Publications

K. Xu, M. Barber, E. Y. Ma, J. Xia, M. Hatnean, G. Balakrishnan, J. Zaanen, Z.-X. Shen, Intrinsic one-dimensional conducting channels in the Kondo insulator SmB6, arXiv:2106.00112

A. Waghmare, J. Bromley, J. Shan, E. Y. Ma, Nonlinear response of microwave impedance microscopy, Applied Physics Letters 126, 133505 (2025) Editor's Pick (PDF)

N. Cira, M. Paull, S. Sinha, F. Zanini, E. Y. Ma, I. Riedel-Kruse, Structure, motion, and multiscale search of traveling networks, Nature Communications 16, 1922 (2025)

N. Morrison, Ho. Taghinejad, J. Analytis, E. Y. Ma, Efficiency of machine learning optimizers and meta-optimization for nanophotonic inverse design tasks, APL Machine Learning 3, 1 (2025) 

N. Morrison, Ho. Taghinejad, J. Analytis, E. Y. Ma, Coherent spin wave excitation with radio-frequency spin–orbit torque, Journal of Applied Physics 136, 113901 (2024) 

J. Shan, N. Morrison, S.-D. Chen, F. Wang, E. Y. Ma, Johnson-noise-limited cancellation-free microwave impedance microscopy with monolithic silicon cantilever probes, Nature Communications 15, 5043 (2024)

N. Morrison, S. Pan, E. Y. Ma, Physics-agnostic inverse design using transfer matrices, APL Machine Learning 2, 016115 (2024)

J. Shan, N. Morrison, and E. Y. Ma, Circuit-level design principles for transmission-mode microwave impedance microscopy, Applied Physics Letters 122, 123505 (2023) (PDF) 

E. Y. Ma, J. Hu, L. Waldecker, K. Watanabe, T. Taniguchi, F. Liu, and T. Heinz, The Reststrahlen Effect in the Optically Thin Limit: A Framework for Resonant Response in Thin Media, Nano Letters 22, 8389 (2022) (PDF, Cover art)

J. Shan, A. Pierce, and E. Y. Ma, Universal signal scaling in microwave impedance microscopy, Applied Physics Letters 121, 123507 (2022) (PDF) 

M. Barber, E. Y. Ma and Z.-X. Shen, Microwave impedance microscopy and its application to quantum materials, Nature Reviews Physics 4, 61 (2022)

M. Poudineh*, C. Maikawa*, E. Y. Ma, J. Pan, D. Mamerow, Y. Hang, S. Baker, S. Kim, E. Appel, J. Vuckovic, and Tom Soh, A fluorescence sandwich immunoassay for the real-time continuous detection of glucose and insulin in live animals, Nature Biomedical Engineering 5, 53 (2021)

K. Xu, S. Chen, Y. He, J. He, S. Tang, C. Jia, E. Y. Ma, S. Mo, D. Lu, M. Hashimoto, T. Devereaux, Z.-X. Shen, Metallic surface states in a correlated d-electron topological Kondo insulator candidate FeSb2, Proceedings of the National Academy of Sciences 117, 15409 (2020)

E. Y. Ma, L. Waldecker, D. Rhodes, K. Watanabe, T. Taniguchi, J. Hone, and Tony F. Heinz, High-resolution optical micro-spectroscopy extending from the near-infrared to the vacuum-ultraviolet, Review of Scientific Instrument 91, 073107 (2020)

A. Y. Piggott*, E. Y. Ma*, L. Su*, G. H. Ahn, N. V. Sapra, D. J. F. Vercruysse, A. M. Netherton, A. S. P. Khope, J. E. Bowers, and J. Vuckvic, Inverse-designed photonics for semiconductor foundries, ACS Photonics 7, 569 (2020)

O. Karni, E. Barre, S. Lau, R. Gillen, E. Y. Ma, B. Kim, K. Watanabe, T. Taniguchi, J. Maultzsch, K. Barmak, R. H. Page, and T. F. Heinz, Infrared interlayer exciton emission in MoS2/WSe2 heterostructures, Physical Review Letters 123, 247402 (2019)

M. Allen, Y.-T. Cui, E. Y. Ma, M. Mogi, M. Kawamura, I. C. Fulga, D. Goldhaber-Gordon, Y. Tokura, and Z.-X. Shen, Visualization of an axion insulating state at the transition between 2 chiral quantum anomalous Hall states, Proceedings of the National Academy of Sciences 116, 14511 (2019)

E. Y. Ma*, B. Guzelturk*, G. Li, L. Cao, Z.-X. Shen, A. M. Lindenberg, and T. F. Heinz, Recording interfacial currents on the subnanometer length and femtosecond time scale by terahertz emission, Science Advances 5, eaau0073 (2019)

C. Jin, E. Y. Ma, O. Karni, E. C. Regan, F. Wang, and T. F. Heinz, Ultrafast dynamics in van der Waals heterostructures, Nature Nanotechnology 13, 994 (2018)

Z. Ye, L. Waldecker, E. Y. Ma, D. Rhodes, A. Antony, B. Kim, X.-X. Zhang, M. Deng, Y. Jiang, Z. Lu, D. Smirnov, K. Watanabe, T. Taniguchi, J. Hone, and Tony F. Heinz, Efficient generation of neutral and charged biexcitons in encapsulated WSe2 monolayers, Nature Communications 9, 3718 (2018)

Y.-T. Cui and E. Y. Ma, Microwave impedance microscopy, Chapter in Capacitance Spectroscopy of Semiconductors, Jenny Stanford Publishing (2018)

Scott R. Johnston, E. Y. Ma, and Z.-X. Shen, Optically coupled methods for microwave impedance microscopy, Review of Scientific Instrument 89, 043703 (2018)

S. R. Johnston, Y. Yang, Y.-T. Cui, E. Y. Ma, T. Kämpfe, L. M. Eng, J. Zhou, Y.-F. Chen, M. Lu, and Z.-X. Shen, Measurement of Surface Acoustic Wave Resonances in Ferroelectric Domains by Microwave Microscopy, Journal of Applied Physics 122, 074101 (2017)

C. Zhang, Z. Liu, Z. Chen, Y. Xie, R. He, S. Tang, J. He, W. Li, T. Jia, S. N. Rebec, E. Y. Ma, H. Yan, M. Hashimoto, D. Lu, S.-K. Mo, Y. Hikita, R. G. Moore, H. Y. Hwang, D. Lee, and Z.-X. Shen, Ubiquitous strong electron–phonon coupling at the interface of FeSe/SrTiO3, Nature Communications 8, 14468 (2017)

Y.-T. Cui, B. Wen, E. Y. Ma, G. Diankov, Z. Han, F. Amet, T. Taniguchi, K. Watanabe, D. Goldhaber-Gordon, C. R. Dean, and Z.-X. Shen, Unconventional correlation between quantum Hall transport quantization and bulk state filling in gated graphene devices, Physical Review Letters 117, 186601 (2016)

Z. Wei, E. Y. Ma, Y.-T. Cui, S. Johnston, Y. Yang, K. Agarwal, M. A. Kelly, Z.-X. Shen and X. Chen, Quantitative analysis of effective height of probes in microwave impedance microscopy, Review of Scientific Instrument 87, 094701 (2016)

Y.-T. Cui*, E. Y. Ma* and Z.-X. Shen, Quartz tuning fork based microwave impedance microscopy, Review of Scientific Instrument 87, 063711 (2016)

Z. Wei, Y.-T. Cui, E. Y. Ma, S. Johnston, Y. Yang, R. Chen, M. Kelly, Z.-X. Shen, and X. Chen, Quantitative theory for probe-sample interaction with inhomogeneous perturbation in near-field scanning microwave microscopy, IEEE Transactions on Microwave Theory and Techniques 64, 1402 (2016)

E. Y. Ma*, Y.-T. Cui*, K. Ueda*, S. Tang, K. Chen, N. Tamura, P. M. Wu, J. Fujioka, Y. Tokura, and Z.-X. Shen, Mobile metallic domain walls in an all-in-all-out magnetic insulator, Science 350, 538 (2015)

W. Kundhikanjana, Z. Sheng, Y. Yang, K. Lai, E. Y. Ma, Y.-T. Cui, M. A. Kelly, M. Nakamura, M. Kawasaki, Y. Tokura, Q. Tang, K. Zhang, X. Li, and Z.-X. Shen, Direct imaging of dynamic glassy behavior in a strained manganite film, Physical Review Letters 115, 265701 (2015)

E. Y. Ma, B. Bryant, Y. Tokunaga, G. Aeppli, Y. Tokura, and Z.-X. Shen, Charge-order domain walls with enhanced conductivity in a layered manganite, Nature Communications 6, 7595 (2015)

E. Y. Ma, M. R. Calvo, J. Wang, B. Lian, M. Mühlbauer, C. Brüne, Y.-T. Cui, K. Lai, W. Kundhikanjana, Y. Yang, M. Baenninger, M. König, C. Ames, H. Buhmann, P. Leubner, L. W. Molenkamp, S.-C. Zhang, D. Goldhaber-Gordon, M. A. Kelly, and Z.-X. Shen, Unexpected edge conduction in mercury telluride quantum wells under broken time-reversal symmetry, Nature Communications 6, 7252 (2015)

M. D. Allendorf, M. E. Foster, F. Leonard, V. Stavila, P. L. Feng, F. P. Doty, K. Leong, E. Y. Ma, S. R. Johnston, and A. A. Talin, Guest-induced emergent properties in metal–organic frameworks, The Journal of Physical Chemistry Letters 6, 1182 (2015)

Y. Yang, E. Y. Ma, Y. T. Cui, A. Haemmerli, K. Lai, W. Kundhikanjana, N. Harjee, B. L. Pruitt, M. Kelly, and Z.-X. Shen, Shielded piezoresistive cantilever probes for nanoscale topography and electrical imaging, Journal of Micromechanics and Microengineering 24, 045026 (2014)

Y. Yang, E. Y. Ma, A. Haemmerli, K. Lai, W. Kundhikanjana, N. Harjee, B. Pruitt, X. Li, M. Kelly, and Z.-X. Shen, Piezoresistive cantilever probes for simultaneous nanoscale topography and conductivity imaging, IEEE 26th International Conference on Micro Electro Mechanical Systems (MEMS), 323 (2013)

W. Kundhikanjana, Y. Yang, Q. Tanga, K. Zhang, K. Lai, E. Y. Ma, M. Kelly, X. X. Li, and Z.-X. Shen, Unexpected surface implanted layer in static random access memory devices observed by microwave impedance microscope, Semiconductor Science and Technology 28, 025010 (2013)

J. J. Lee, F. T. Schmitt, R. G. Moore, I. M. Vishik, E. Y. Ma, and Z.-X. Shen, Intrinsic ultrathin topological insulators grown via molecular beam epitaxy characterized by in-situ angle resolved photoemission spectroscopy, Applied Physics Letters 101, 013118 (2012)

J. P. Cryan, J. M. Glownia, D. W. Broege, E. Y. Ma, P. H. Bucksbaum, Ensemble of linear molecules in nondispersing rotational quantum states: A molecular stopwatch, Physical Review X 1, 011002

X. Zhu, Y. Zhang, J. Zhang, J. Xu, E. Y. Ma, Z. Li, D. P. Yu, Ultrafine and smooth full metal nanostructures for plasmonics, Advanced Materials 22, 4345 (2010)

X. L. Zhu, E. Y. Ma, J. S. Zhang, J. Xu, X. F. Wu, Y. Zhang, X. B. Han, Q. Fu, Z. M. Liao, L. Chen, and D. P. Yu, Confined three-dimensional plasmon modes inside a ring-shaped nanocavity on a silver film imaged by cathodoluminescence microscopy, Physical Review Letters 105, 127402 (2010)

A. Waghmare, J. Bromley, J. Shan, E. Y. Ma, Nonlinear microwave impedance microscopy, US provisional

Y.-T. Cui, E. Y. Ma, Z.-X. Shen, Microwave impedance microscopy using a tuning fork, US Patent 10060862

E. Y. Ma, Y.-T. Cui, K. Ueda, J. Fujioka, Y. Tokura, Z.-X. Shen, R. B. Laughlin, Metallic-magnetic-domain-wall-based nonvolatile tunable resistor for memory and sensor applications, US Patent 10210970