Publications

Publications after 2012

92. Daehun Lee,Yue Jiang,Xiaoru Zhang,Shahin Jahanbani,Chengyu Wen,Qicheng Zhang,A.T. Charlie Johnson, and Keji Lai, "Klein tunneling of gigahertz elastic waves in nanoelectromechanical metamaterials", Device (2024).
91. Dong Seob Kim, Roy C Dominguez, Rigo Mayorga-Luna, Dingyi Ye, Jacob Embley, Tixuan Tan, Yue Ni, Zhida Liu, Mitchell Ford, Frank Y Gao, Saba Arash, Kenji Watanabe, Takashi Taniguchi, Suenne Kim, Chih-Kang Shih, Keji Lai, Wang Yao, Li Yang, Xiaoqin Li, and Yoichi Miyahara, "Electrostatic moiré potential from twisted hexagonal boron nitride layers", Nature Materials 23, 65 (2024).
90. Jia Yu, Yuchen Zhou, Xiao Wang, Ananth Dodabalapur, and Keji Lai, "Visualization of Mesoscopic Conductivity Fluctuations in Amorphous Semiconductor Thin-Film Transistors", Nano Letters 23, 11749 (2023).
89. Zhanzhi Jiang, Su Kong Chong, Peng Zhang, Peng Deng, Shizai Chu, Shahin Jahanbani, Kang L. Wang, and Keji Lai, "Implementing microwave impedance microscopy in a dilution refrigerator", Review of Scientific Instruments 94, 053701 (2023).
88. Congcong Zhang, Teng Tu, Jingyue Wang, Yongchao Zhu, Congwei Tan, Liang Chen, Mei Wu, Ruixue Zhu, Yizhou Liu, Huixia Fu, Jia Yu, Yichi Zhang, Xuzhong Cong, Xuehan Zhou, Jiaji Zhao, Tianran Li, Zhimin Liao, Xiaosong Wu, Keji Lai, Binghai Yan, Peng Gao, Qianqian Huang, Hai Xu, Huiping Hu, Hongtao Liu, Jianbo Yin, Hailin Peng, "Single-crystalline van der Waals layered dielectric with high dielectric constant", Nature Materials 22, 832 (2023).
87. Daehun Lee, Shahin Jahanbani, Jack Kramer, Ruochen Lu, Keji Lai, "Nanoscale imaging of super-high-frequency microelectromechanical resonators with femtometer sensitivity", Nature Communications 14, 1188 (2023).
86. Lucas Caretta, Yu-Tsun Shao, Jia Yu, Antonio B Mei, Bastien F Grosso, Cheng Dai, Piush Behera, Daehun Lee, Margaret McCarter, Eric Parsonnet, Harikrishnan K. P, Fei Xue, Xiangwei Guo, Edward S Barnard, Steffen Ganschow, Zijian Hong, Archana Raja, Lane W Martin, Long-Qing Chen, Manfred Fiebig, Keji Lai, Nicola A Spaldin, David A Muller, Darrell G Schlom, Ramamoorthy Ramesh, "Non-volatile electric-field control of inversion symmetry", Nature Materials 22, 207 (2023).
85. Keji Lai, "Spontaneous polarization in van der Waals materials: Two-dimensional ferroelectrics and device applications", Journal of Applied Physics 132, 121102 (2022).
84. Yichi Zhang, Jia Yu, Ruixue Zhu, Mengdi Wang, Congwei Tan, Teng Tu, Xuehan Zhou, Congcong Zhang, Mengshi Yu, Xiaoyin Gao, Yufei Wang, Hongtao Liu, Peng Gao, Keji Lai and Hailin Peng, "A single-crystalline native dielectric for two-dimensional semiconductors with an equivalent oxide thickness below 0.5 nm", Nature Electronics 5, 643 (2022).
83. Linbo Shao, Di Zhu, Marco Colangelo, Daehun Lee, Neil Sinclair, Yaowen Hu, Peter T Rakich, Keji Lai, Karl K Berggren, Marko Loncar, "Electrical control of surface acoustic waves", Nature Electronics 5, 348 (2022).
82. Qicheng Zhang, Daehun Lee, Lu Zheng, Xuejian Ma, Shawn I Meyer, Li He, Han Ye, Ze Gong, Bo Zhen, Keji Lai, AT Johnson, "Gigahertz topological valley Hall effect in nanoelectromechanical phononic crystals", Nature Electronics 5, 157 (2022). See news coverage at UT CNS News.
81. Yujin Cho, Sean M Anderson, Bernardo S Mendoza, Shun Okano, N Arzate, Anatoli I Shkrebtii, Di Wu, Keji Lai, Ramon Carriles, DRT Zahn, MC Downer, "Second-harmonic and linear spectroscopy of a-In₂Se₃", Physical Review Materials 6, 034006 (2022).
80. Daehun Lee, Shawn Meyer, Songbin Gong, Ruochen Lu, and Keji Lai, "Visualization of acoustic power flow in suspended thin-film lithium niobate phononic devices", Applied Physics Letters 119, 214101 (2021).
79. Mengke Liu, Joshua Leveillee, Shuangzan Lu, Jia Yu, Hyunsue Kim, Cheng Tian, Youguo Shi, Keji Lai, Chendong Zhang, Feliciano Giustino, and Chih-Kang Shih, "Monolayer 1T-NbSe₂ as a 2D-correlated magnetic insulator", Science Advances 7, eabi6339 (2021).
78. Daehun Lee, Qiyu Liu, Lu Zheng, Xuejian Ma, Huan Li, Mo Li, and Keji Lai, "Direct visualization of gigahertz acoustic wave propagation in suspended phononic circuits", Physical Review Applied 16, 034047 (2021).
77. Xuejian Ma, Fei Zhang, Zhaodong Chu, Ji Hao, Xihan Chen, Jiamin Quan, Zhiyuan Huang, Xiaoming Wang, Xiaoqin Li, Yanfa Yan, Kai Zhu, and Keji Lai, "Superior photo-carrier diffusion dynamics in organic-inorganic hybrid perovskites revealed by spatiotemporal conductivity imaging", Nature Communications 12, 5009 (2021).
76. Jiamin Quan, Lukas Linhart, Miao-Ling Lin, Daehun Lee, Jihang Zhu, Chun-Yuan Wang, Wei-Ting Hsu, Junho Choi, Jacob Embley, Carter Young, Takashi Taniguchi, Kenji Watanabe, Chih-Kang Shih, Keji Lai, Allan H. MacDonald, Ping-Heng Tan, Florian Libisch, and Xiaoqin Li, "Phonon renormalization in reconstructed MoS₂ moire superlattices", Nature Materials 20, 1110 (2021).
75. Marc Reynaud, Pei-Yu Chen, Wente Li, Therese Paoletta, Sunah Kwon, Dae Hun Lee, Ilya Beskin, Agham B Posadas, Moon J Kim, Chad M Landis, Keji Lai, John G Ekerdt, Alexander A Demkov, "Electro-optic response in epitaxially stabilized orthorhombic mm2 BaTiO₃", Physical Review Materials 5, 035201 (2021).
74. Ryo Noguchi, Masaru Kobayashi, Zhanzhi Jiang, Kenta Kuroda, Takanari Takahashi, Zifan Xu, Daehun Lee, Motoaki Hirayama, Masayuki Ochi, Tetsuroh Shirasawa, Peng Zhang, Chun Lin, Cedric Bareille, Shunsuke Sakuragi, Hiroaki Tanaka, So Kunisada, Kifu Kurokawa, Koichiro Yaji, Ayumi Harasawa, Viktor Kandyba, Alessio Giampietri, Alexei Barinov, Timur K. Kim, Cephise Cacho, Makoto Hashimoto, Donghui Lu, Shik Shin, Ryotaro Arita, Keji Lai, Takao Sasagawa, and Takeshi Kondo, "Evidence for a higher-order topological insulator in a three-dimensional material built from van der Waals stacking of bismuth-halide chains", Nature Materials 20, 473 (2021).
73. Zhaodong Chu, Emma C. Regan, Xuejian Ma, Danqing Wang, Zifan Xu, M. Iqbal Bakti Utama, Kentaro Yumigeta, Mark Blei, Kenji Watanabe, Takashi Taniguchi, Sefaattin Tongay, Feng Wang, and Keji Lai, "Nanoscale Conductivity Imaging of Correlated Electronic States in WSe₂/WS₂ Moire Superlattices", Physical Review Letters 125, 186803 (2020).
72. Teng Tu, Yichi Zhang, Tianran Li, Jia Yu, Lingmei Liu, Jinxiong Wu, Congwei Tan, Jilin Tang, Yan Liang, Congcong Zhang, Yumin Dai, Yu Han, Keji Lai, Hailin Peng, "Uniform high-k amorphous native oxide synthesized by oxygen plasma for top-gated transistors", Nano Letters 20, 7469 (2020).
71. Lu Zheng, Linbo Shao, Marko Loncar, Keji Lai, "Imaging Acoustic Waves by Microwave Microscopy: Microwave Impedance Microscopy for Visualizing Gigahertz Acoustic Waves", IEEE Microwave Magazine 21, 60 (2020).
70. Tianran Li, Teng Tu, Yuanwei Sun, Huixia Fu, Jia Yu, Lei Xing, Ziang Wang, Huimin Wang, Rundong Jia, Jinxiong Wu, Congwei Tan, Yan Liang, Yichi Zhang, Congcong Zhang, Yumin Dai, Chenguang Qiu, Ming Li, Ru Huang, Liying Jiao, Keji Lai, Binghai Yan, Peng Gao, Hailin Peng, "A native oxide high-k gate dielectric for two-dimensional electronics", Nature Electronics 3, 473 (2020).
69. Zhaodong Chu, Lu Zheng, Keji Lai, "Microwave Microscopy and Its Applications", Annual Review of Materials Research 50, 105 (2020).
68. Md Hasibul Alam, Zifan Xu, Sayema Chowdhury, Zhanzhi Jiang, Deepyanti Taneja, Sanjay K Banerjee, Keji Lai, Maria Helena Braga, Deji Akinwande, "Lithium-ion electrolytic substrates for sub-1V high-performance transition metal dichalcogenide transistors and amplifiers", Nature Communications 11, 3203 (2020).
67. Zhaodong Chu, Chun-Yuan Wang, Jiamin Quan, Chenhui Zhang, Chao Lei, Ali Han, Xuejian Ma, Hao-Ling Tang, Dishan Abeysinghe, Matthew Staab, Xixiang Zhang, Allan H MacDonald, Vincent Tung, Xiaoqin Li, Chih-Kang Shih, Keji Lai, "Unveiling defect-mediated carrier dynamics in monolayer semiconductors by spatiotemporal microwave imaging", Proceedings of the National Academy of Sciences 117, 13908 (2020).
66. Ashish Gangshettiwar, Yanglin Zhu, Zhanzhi Jiang, Jin Peng, Yu Wang, Jiaming He, Jianshi Zhou, Zhiqiang Mao, Keji Lai, "Emergence of a competing stripe phase near the Mott transition in Ti-doped bilayer calcium ruthenates", Physical Review B 101, 201106(R) (2020).
65. Peng Chen, Louis Ponet, Keji Lai, Roberto Cingolani, Sergey Artyukhin, "Domain wall-localized phonons in BiFeO3: spectrum and selection rules", npj Computational Materials 6, 48 (2020).
64. Edward L Lin, Agham B Posadas, Lu Zheng, Hsin Wei Wu, Pei-Yu Chen, Brennan M Coffey, Keji Lai, Alexander A Demkov, Davis J Smith, John G Ekerdt, "Epitaxial integration of ferroelectric and conductive perovskites on silicon", Journal of Vacuum Science & Technology A 38, 022403 (2020).
63. Yen-Lin Huang, Lu Zheng, Peng Chen, Xiaoxing Cheng, Shang-Lin Hsu, Tiannan Yang, Xiaoyu Wu, Louis Ponet, Ramamoorthy Ramesh, Long-Qing Chen, Sergey Artyukhin, Ying-Hao Chu, and Keji Lai, "Unexpected Giant Microwave Conductivity in a Nominally Silent BiFeO3 Domain Wall", Advanced Materials 32, 1905132 (2020).
62. Smarak Maity, Linbo Shao, Stefan Bogdanovic, Srujan Meesala, Young-Ik Sohn, Neil Sinclair, Benjamin Pingault, Michelle Chalupnik, Cleaven Chia, Lu Zheng, Keji Lai, Marko Loncar, "Coherent acoustic control of a single silicon vacancy spin in diamond", Nature communications 11, 193 (2020).
61. Linbo Shao, Mengjie Yu, Smarak Maity, Neil Sinclair, Lu Zheng, Cleaven Chia, Amirhassan Shams-Ansari, Cheng Wang, Mian Zhang, Keji Lai, Marko Loncar, "Microwave-to-optical conversion using lithium niobate thin-film acoustic resonators", Optica 6, 1498-1505 (2019).
60. Edward L Lin, Agham B Posadas, Lu Zheng, J Elliott Ortmann, Stefan Abel, Jean Fompeyrine, Keji Lai, Alexander A Demkov, John G Ekerdt, "Atomic layer deposition of epitaxial ferroelectric barium titanate on Si (001) for electronic and photonic applications", Journal of Applied Physics 126, 064101 (2019).
59. Linbo Shao, Smarak Maity, Lu Zheng, Lue Wu, Amirhassan Shams-Ansari, Young-Ik Sohn, Eric Puma, MN Gadalla, Mian Zhang, Cheng Wang, Evelyn Hu, Keji Lai, Marko Loncar, "Phononic Band Structure Engineering for High-Q Gigahertz Surface Acoustic Wave Resonators on Lithium Niobate", Physical Review Applied 12, 014022 (2019).
58. Di Wu, Wei Li, Amritesh Rai, Xiaoyu Wu, Hema CP Movva, Maruthi Nagavalli Yogeesh, Zhaodong Chu, Sanjay K Banerjee, Deji Akinwande, and Keji Lai, "Visualization of Local Conductance in MoS2-WSe2 Heterostructure Transistors", Nano letters 19, 1976 (2019).
57. Zhaodong Chu, Ali Han, Chao Lei, Sergei Lopatin, Peng Li, David Wannlund, Di Wu, Kevin Herrera, Xixiang Zhang, Allan H MacDonald, Xiaoqin Li, Lain-Jong Li, and Keji Lai, "Energy-Resolved Photoconductivity Mapping in a Monolayer-Bilayer WSe2 Lateral Heterostructure", Nano letters 18, 7200 (2018).
56. Kristy J Kormondy, Yujin Cho, Agham B Posadas, Lu Zheng, Keji Lai, Qingxiao Wang, Moon J Kim, Qian He, Albina Y Borisevich, Michael C Downer, and Alexander A Demkov, "Piezoelectric modulation of nonlinear optical response in BaTiO3 thin film", Applied Physics Letters 113, 132902 (2018).
55. Xiaoyu Wu, Kai Du, Lu Zheng, Di Wu, Sang-Wook Cheong, and Keji Lai, "Microwave conductivity of ferroelectric domains and domain walls in a hexagonal rare-earth ferrite", Physical Review B 98, 081409(R) (2018).
54. Lu Zheng, Di Wu, Xiaoyu Wu, and Keji Lai, "Visualization of Surface-Acoustic-Wave Potential by Transmission-Mode Microwave Impedance Microscopy", Physical Review Applied 9, 061002 (2018).
53. Lu Zheng, Hui Dong, Xiaoyu Wu, Yen-Lin Huang, Wenbo Wang, Weida Wu, Zheng Wang, and Keji Lai, "Interferometric imaging of nonlocal electromechanical power transduction in ferroelectric domains", Proceedings of the National Academy of Sciences 115 (21) 5338-5342 (2018). See news coverage at UT CNS News.
52. Yujin Cho, Patrick Ponath, Lu Zheng, Benjamin Hatanpaa, Keji Lai, Alexander A Demkov, and Michael C Downer, "Polarization retention in ultra-thin barium titanate films on Ge (001)", Applied Physics Letters 112, 162901 (2018).
51. Xiaoyu Wu, Zhenqi Hao, Di Wu, Lu Zheng, Zhanzhi Jiang, Vishal Ganesan, Yayu Wang, and Keji Lai, "Quantitative measurements of nanoscale permittivity and conductivity using tuning-fork-based microwave impedance microscopy", Review of Scientific Instruments 89, 043704 (2018).
50. Zhaodong Chu, Mengjin Yang, Philip Schulz, Di Wu, Xin Ma, Edward Seifert, Liuyang Sun, Xiaoqin Li, Kai Zhu, and Keji Lai, "Impact of grain boundaries on efficiency andstability of organic-inorganic trihalide perovskites", Nature Communications 8, 2230 (2017). See news coverage at NREL News.
49. Zhanzhi Jiang, Xiaoyu Wu, Hyungwoo Lee, Jung-Woo Lee, Jianan Li, Guanglei Cheng, Chang-Beom Eom, Jeremy Levy, and Keji Lai, "Direct imaging of sketched conductive nanostructures at the LaAlO₃/SrTiO₃ interface", Applied Physics Letters 111, 233104 (2017).
48. Yutsung Tsai, Zhaodong Chu, Yimo Han, Chih-Piao Chuu, Di Wu, Alex Johnson, Fei Cheng, Mei-Yin Chou, David A. Muller, Xiaoqin Li, Keji Lai, and Chih-Kang Shih, "Tailoring Semiconductor Lateral Multijunctions for Giant Photoconductivity Enhancement", Advanced Materials 29, 1703680 (2017).
47. Yu Zhou, Di Wu, Yihan Zhu, Yujin Cho, Qing He, Xiao Yang, Kevin Herrera, Zhaodong Chu, Yu Han, Michael C. Downer, Hailin Peng, and Keji Lai, "Out-of-Plane Piezoelectricity and Ferroelectricity in Layered α-In₂Se₃ Nanoflakes", Nano Letters, 17 (9), 5508 (2017).
46. Tom T. A. Lummen, J. Leung, Amit Kumar, X. Wu, Y. Ren, Brian K. VanLeeuwen, Ryan C. Haislmaier, Martin Holt, Keji Lai, Sergei V. Kalinin, and Venkatraman Gopalan, "Emergent Low-Symmetry Phases and Large Property Enhancements in Ferroelectric KNbO₃ Bulk Crystals", Advanced Materials 29, 1700530 (2017).
45. Xiaoyu Wu, Urko Petralanda, Lu Zheng, Yuan Ren, Rongwei Hu, Sang-Wook Cheong, Sergey Artyukhin, Keji Lai, "Low-energy Structural Dynamics of Ferroelectric Domain Walls in Hexagonal Rare-earth Manganites", Science Advances 3 (5), e1602371 (2017). See news coverage at UT CNS News.
44. Di Wu, Xiao Li, Lan Luan, Xiaoyu Wu, Wei Li, Maruthi N Yogeesh, Rudresh Ghosh, Zhaodong Chu, Deji Akinwande, Qian Niu, Keji Lai, "Uncovering edge states and electrical inhomogeneity in MoS₂ field-effect transistors", Proceedings of the National Academy of Sciences 113 (31), 8583-8588 (2016). See news coverage at UT News, PhysOrg, AzoNano, ScienceDaily, DOE research highlight.
43. C Tan, Y Liu, H Chou, JS Kim, D Wu, D Akinwande, K Lai, "Laser-assisted oxidation of multi-layer tungsten diselenide nanosheets", Applied Physics Letters 108 (8), 083112 (2016).
42. Worasom Kundhikanjana, Zhigao Sheng, Yongliang Yang, Keji Lai, Eric Yue Ma, Yong-Tao Cui, Michael A Kelly, Masao Nakamura, Masashi Kawasaki, Yoshinori Tokura, Qiaochu Tang, Kun Zhang, Xinxin Li, Zhi-Xun Shen, "Direct Imaging of Dynamic Glassy Behavior in a Strained Manganite Film", Physical Review Letters 115 (26), 265701 (2015).
41. Di Wu, Alexander J Pak, Yingnan Liu, Yu Zhou, Xiaoyu Wu, Yihan Zhu, Min Lin, Yu Han, Yuan Ren, Hailin Peng, Yu-Hao Tsai, Gyeong S Hwang, Keji Lai, "Thickness-Dependent Dielectric Constant of Few-Layer In₂Se₃ Nanoflakes", Nano Letters 15 (12), 8136-8140 (2015).
40. Yingnan Liu, Cheng Tan, Harry Chou, Avinash Nayak, Di Wu, Rudresh Ghosh, Hsiao-Yu Chang, Yufeng Hao, Xiaohan Wang, Joon-Seok Kim, Richard Piner, Rodney S Ruoff, Deji Akinwande, Keji Lai, "Thermal Oxidation of WSe₂ Nanosheets Adhered on SiO₂/Si Substrates", Nano Letters 15 (8), 4979-4984 (2015).
39. Y Ren, H Yuan, X Wu, Z Chen, Y Iwasa, Y Cui, HY Hwang, K Lai, "Direct Imaging of Nanoscale Conductance Evolution in Ion-Gel-Gated Oxide Transistors", Nano Letters 15 (7), 4730-4736 (2015).
38. Eric Yue Ma, M Reyes Calvo, Jing Wang, Biao Lian, Mathias Muhlbauer, Christoph Brune, Yong-Tao Cui, Keji Lai, Worasom Kundhikanjana, Yongliang Yang, Matthias Baenninger, Markus Konig, Christopher Ames, Hartmut Buhmann, Philipp Leubner, Laurens W Molenkamp, Shou-Cheng Zhang, David Goldhaber-Gordon, Michael A Kelly, Zhi-Xun Shen, "Unexpected edge conduction in mercury telluride quantum wells under broken time-reversal symmetry", Nature Communications 6, 7252 (2015).
37. Patrick Ponath, Kurt Fredrickson, Agham B Posadas, Yuan Ren, Xiaoyu Wu, Rama K Vasudevan, M Baris Okatan, S Jesse, Toshihiro Aoki, Martha R McCartney, David J Smith, Sergei V Kalinin, Keji Lai, Alexander A Demkov, "Carrier density modulation in a germanium heterostructure by ferroelectric switching", Nature Communications 6, 6067 (2015). See news coverage at EETimes.
36. Joon-Seok Kim, Yingnan Liu, Weinan Zhu, Seohee Kim, Di Wu, Li Tao, Ananth Dodabalapur, Keji Lai, Deji Akinwande, "Toward air-stable multilayer phosphorene thin-films and transistors", Scientific Reports, 5, 8989 (2015).
35. Y Liu, R Ghosh, D Wu, A Ismach, R Ruoff, K Lai, "Mesoscale imperfections in MoS₂ atomic layers grown by a vapor transport technique", Nano Letters 14 (8), 4682-4686 (2014). See news coverage in NanoTechWeb.
34. Yongliang Yang, Eric Yue Ma, Yong-Tao Cui, Alexandre Haemmerli, Keji Lai, Worasom Kundhikanjana, Nahid Harjee, Beth L Pruitt, Michael Kelly, Zhi-Xun Shen, "Shielded piezoresistive cantilever probes for nanoscale topography and electrical imaging", Journal of Micromechanics and Microengineering 24 (4), 045026 (2014).
33. Worasom Kundhikanjana, Yongliang Yang, Q Tanga, K Zhang, K Lai, Y Ma, MA Kelly, XX Li, ZX Shen, "Unexpected surface implanted layer in static random access memory devices observed by microwave impedance microscope", Semiconductor Science and Technology 28 (2), 025010 (2013).

Earlier publications of Dr. Lai

32. Yongliang Yang, Keji Lai, Qiaochu Tang, Worasom Kundhikanjana, Michael A Kelly, Kun Zhang, Zhi-xun Shen, Xinxin Li, "Batch-fabricated cantilever probes with electrical shielding for nanoscale dielectric and conductivity imaging", Journal of Micromechanics and Microengineering 22 (11), 115040 (2012).
31. JJ Cha, D Kong, SS Hong, JG Analytis, K Lai, Y Cui, "Weak Antilocalization in Bi₂(Se_xTe_1-x)₃ Nanoribbons and Nanoplates", Nano Letters 12 (2), 1107-1111 (2012).
30. Desheng Kong, Yulin Chen, Judy J Cha, Qianfan Zhang, James G Analytis, Keji Lai, Zhongkai Liu, Seung Sae Hong, Kristie J Koski, Sung-Kwan Mo, Zahid Hussain, Ian R Fisher, Zhi-Xun Shen, Yi Cui, "Ambipolar field effect in the ternary topological insulator (Bi_xSb_1-x)₂Te₃ by composition tuning", Nature Nanotechnology 6 (11), 705-709 (2011).
29. K Lai, W Kundhikanjana, MA Kelly, ZX Shen, J Shabani, M Shayegan, "Imaging of Coulomb-driven quantum Hall edge states", Physical Review Letters 107 (17), 176809 (2011).
28. Desheng Kong, Judy J Cha, Keji Lai, Hailin Peng, James G Analytis, Stefan Meister, Yulin Chen, Hai-Jun Zhang, Ian R Fisher, Zhi-Xun Shen, Yi Cui, "Rapid surface oxidation as a source of surface degradation factor for Bi₂Se₃", ACS Nano 5 (6), 4698-4703 (2011).
27. K Lai, W Kundhikanjana, MA Kelly, ZX Shen, "Nanoscale microwave microscopy using shielded cantilever probes", Applied Nanoscience 1 (1), 13-18 (2011).
26. W Kundhikanjana, K Lai, MA Kelly, ZX Shen, "Cryogenic microwave imaging of metal-insulator transition in doped silicon", Review of Scientific Instruments 82 (3), 033705 (2011).
25. Seung Sae Hong, Worasom Kundhikanjana, Judy J Cha, Keji Lai, Desheng Kong, Stefan Meister, Michael A Kelly, Zhi-Xun Shen, Yi Cui, "Ultrathin topological insulator Bi₂Se₃ nanoribbons exfoliated by atomic force microscopy", Nano Letters 10 (8), 3118-3122 (2010).
24. Keji Lai, Masao Nakamura, Worasom Kundhikanjana, Masashi Kawasaki, Yoshinori Tokura, Michael A Kelly, Zhi-Xun Shen, "Mesoscopic percolating resistance network in a strained manganite thin film", Science 329 (5988), 190-193 (2010).
23. Hailin Peng, Keji Lai, Desheng Kong, Stefan Meister, Yulin Chen, Xiao-Liang Qi, Shou-Cheng Zhang, Zhi-Xun Shen, Yi Cui, "Aharonov-Bohm interference in topological insulator nanoribbons", Nature Materials 9 (3), 225-229 (2010).
22. Desheng Kong, Jason C Randel, Hailin Peng, Judy J Cha, Stefan Meister, Keji Lai, Yulin Chen, Zhi-Xun Shen, Hari C Manoharan, Yi Cui, "Topological insulator nanowires and nanoribbons", Nano Letters 10 (1), 329-333 (2009).
21. W Kundhikanjana, K Lai, H Wang, H Dai, MA Kelly, Z Shen, "Hierarchy of electronic properties of chemically derived and pristine graphene probed by microwave imaging", Nano Letters 9 (11), 3762-3765 (2009).
20. K Lai, W Kundhikanjana, H Peng, Y Cui, MA Kelly, ZX Shen, "Tapping mode microwave impedance microscopy", Review of Scientific Instruments 80 (4), 043707 (2009).
19. Keji Lai, Hailin Peng, Worasom Kundhikanjana, David T Schoen, Chong Xie, Stefan Meister, Yi Cui, Michael A Kelly, Zhi-Xun Shen, "Nanoscale electronic inhomogeneity in In₂Se₃ nanoribbons revealed by microwave impedance microscopy", Nano letters 9 (3), 1265-1269 (2009).
18. K Lai, W Kundhikanjana, MA Kelly, ZX Shen, "Calibration of shielded microwave probes using bulk dielectrics", Applied Physics Letters 93 (12), 123105 (2008).
17. K Lai, W Kundhikanjana, M Kelly, ZX Shen, "Modeling and characterization of a cantilever-based near-field scanning microwave impedance microscope", Review of Scientific Instruments 79 (6), 06370 (2008).
16. J Liu, TM Lu, J Kim, K Lai, DC Tsui, YH Xie, "The proximity effect of the regrowth interface on two-dimensional electron density in strained Si", Applied Physics Letters 92 (11), 112113 (2008).
15. K Lai, MB Ji, N Leindecker, MA Kelly, ZX Shen, "Atomic-force-microscope-compatible near-field scanning microwave microscope with separated excitation and sensing probes", Review of Scientific Instruments 78 (6), 063702 (2007).
14. H Zhu, K Lai, DC Tsui, SP Bayrakci, NP Ong, M Manfra, L Pfeiffer, K West, "Density and well width dependences of the effective mass of two-dimensional holes in (100) GaAs quantum wells measured using cyclotron resonance at microwave frequencies", Solid State Communications 141 (9), 510-513 (2007).
13. TM Lu, DR Luhman, K Lai, DC Tsui, LN Pfeiffer, KW West, "Undoped high mobility two-dimensional hole-channel GaAs/Al_xGa_1-xAs heterostructure field-effect transistors with atomic-layer-deposited dielectric", Applied Physics Letters 90 (11), 112113 (2007).
12. K Lai, W Pan, DC Tsui, S Lyon, M Muhlberger, F Schaffler, "Linear temperature dependence of the conductivity in Si two-dimensional electrons near the apparent metal-to-insulator transition", Physical Review B 75 (3), 033314 (2007).
11. TM Lu, J Liu, J Kim, K Lai, DC Tsui, YH Xie, "Capacitively induced high mobility two-dimensional electron gas in undoped Si/Si_1-xGe_x heterostructures with atomic-layer-deposited dielectric", Applied Physics Letters 90, 182114 (2007).
10. K Lai, W Pan, DC Tsui, S Lyon, M Muhlberger, F Schaffler, "Quantum Hall ferromagnetism in a two-valley strained Si quantum well", Physica E: Low-dimensional Systems and Nanostructures 34 (1), 176-178 (2006).
9. K Lai, TM Lu, W Pan, DC Tsui, S Lyon, J Liu, YH Xie, M Muhlberger, F Schaffler, "Valley splitting of Si/Si_1-xGe_x heterostructures in tilted magnetic fields", Physical Review B 73 (16), 161301 (2006).
8. K Lai, W Pan, DC Tsui, S Lyon, M Muhlberger, F Schaffler, "Intervalley gap anomaly of two-dimensional electrons in silicon", Physical Review Letters 96 (7), 076805 (2006).
7. K Lai, W Pan, DC Tsui, SA Lyon, M Muhlberger, F Schaffler, "Two-dimensional metal-insulator transition and in-plane magnetoresistance in a high-mobility strained Si quantum well", Physical Review B 72 (8), 081313 (2005).
6. K Lai, PD Ye, W Pan, DC Tsui, SA Lyon, M Muhlberger, F Schaffler, "Modulation of the high mobility two-dimensional electrons in Si/SiGe using atomic-layer-deposited gate dielectric", Applied Physics Letters, 87 (14), 142103 (2005).
5. Ravi Pillarisetty, Hwayong Noh, E Tutuc, EP De Poortere, K Lai, DC Tsui, M Shayegan, "Coulomb drag near the metal-insulator transition in two dimensions", Physical Review B 71 (11), 115307 (2005).
4. K Lai, W Pan, DC Tsui, S Lyon, M Muhlberger, F Schaffler, "Two-flux composite fermion series of the fractional quantum hall states in strained Si", Physical Review Letters 93 (15), 156805 (2004).
3. K Lai, W Pan, DC Tsui, YH Xie, "Fractional quantum Hall effect at v = 2/3 and 4/3 in strained Si quantum wells", Physical Review B 69 (12), 125337 (2004).
2. K Lai, W Pan, DC Tsui, Ya-Hong Xie, "Observation of the apparent metal-insulator transition of high-mobility two-dimensional electron system in a Si/Si_1-xGe_x heterostructure", Applied Physics Letters 84 (2), 302-304 (2004).
1. W Pan, K Lai, SP Bayrakci, NP Ong, DC Tsui, LN Pfeiffer, KW West, "Cyclotron resonance at microwave frequencies in two-dimensional hole system in AlGaAs/GaAs quantum wells", Applied Physics Letters 83 (17), 3519-3521 (2003).

Lai Research Group @ UT Austin

Nanoscale ElectroMagnetic Laboratory

Publications

Publications after 2012

Earlier publications of Dr. Lai