Research

IRG 2: Layered Quantum Materials

IRG 2 is creating and studying new forms of quantum matter in atomically layered materials and controlling novel topological and excitonic phase transitions within these materials, with potentially disruptive impact on energy and information technologies.

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Publications

  1. Unraveling Intrinsic Flexoelectricity in Twisted Double Bilayer Graphene

    Li, Y.; Wang, X.; Tang, D.; Wang, X.; Watanabe, K.; Taniguchi, T.; Gamelin, D. R.; Cobden, D. H.; Yankowitz, M.; Xu, X.; Li, J.
  2. Highly Anisotropic Excitons and Multiple Phonon Bound States in a Van der Waals Antiferromagnetic Insulator.

    Kyle Hwangbo, Qi Zhang, Qianni Jiang, Yong Wang, Jordan Fonseca, Chong Wang, Geoffrey M. Diederich, Daniel R. Gamelin, Di Xiao, Jiun-Haw Chu, Wang Yao & Xiaodong Xu
  3. Defect-Induced Magnetic Skyrmion in Two-Dimensional Chromium Tri-Iodide Monolayer

    Ryan A. Beck, Lixin Lu, Peter V. Sushko, Xiaodong Xu, Xiaosong Li
  4. Spin Photovoltaic Effect in Magnetic van der Waals Heterostructures

    T. Song, E. Anderson, M. Wei-Yuan T, K. Seyler, T. Taniguchi, K. Watanabe, M. A. McGuire, X. Li, T. Cao, D. Xiao, W. Yao, X. Xu
  5. Bismuth-doping Alters Structural Phase Transitions in Methylammonium Lead Tribromide Single Crystals

    Jedlicka E., Wang J., Mutch J., Jung Y., Went P., Mohammed J., Ziffer M., Giridharagopal R., Walsh A., Chu J.-H., Ginger D. S.
  6. Surface Modification of Black Phosphorus with Group 13 Lewis Acids for Ambient Protection and Electronic Tuning

    Daniel Tofan, Yukako Sakazaki, Kendahl Walz Mitra, Ruoming Peng, Seokhyeong Lee, Mo Li, Alexandra Velian
  7. Competing Correlated States and Abundant Orbital Magnetism in Twisted Monolayer-Bilayer Graphene

    Minhao He, Ya-Hui Zhang, Yuhao Li, Zaiyao Fei, Kenji Watanabe, Takashi Taniguchi, Xiaodong Xu, Matthew Yankowitz
  8. Imaging Topological Spin Structures Using Light-Polarization and Magnetic Microscopy

    Till Lenz, Georgios Chatzidrosos, Zhiyuan Wang, Lykourgos Bougas, Yannick Dumeige, Arne Wickenbrock, Nico Kerber, Jakub Zázvorka, Fabian Kammerbauer, Mathias Kläui, Zeeshawn Kazi, Kai-Mei C. Fu, Kohei M. Itoh, Hideyuki Watanabe, and Dmitry Budker
  9. Designing Artificial Two-Dimensional Landscapes via Room-Temperature Atomic-Layer Substitution

    Yunfan Guo, Yuxuan Lin, Kaichen Xie, Biao Yuan, Jiadi Zhu, Pin-Chun Shen, Ang-Yu Lu, Cong Su, Enzheng Shi, Kunyan Zhang, Zhengyang Cai, Jihoon Park, Qingqing Ji, Jiangtao Wang, Xiaochuan Dai, Xuezeng Tian, Shengxi Huang, Letian Dou, Ju Li, Yi Yu, Juan-Carlos Idrobo, Ting Cao, Tomás Palacios, Jing Kong
  10. Experimental Measurement of the Intrinsic Excitonic Wavefunction

    Michael K. L. Man, Julien Madéo, Chakradhar Sahoo, Kaichen Xie, Marshall Campbell, Vivek Pareek, Arka Karmakar, E Laine Wong, Abdullah Al-Mahboob, Nicholas S. Chan, David R. Bacon, Xing Zhu, Mohamed Abdelrasoul, Xiaoquin Li, Tony F. Heinz, Felipe H. da Jornada, Ting Cao, Keshav M. Dani
  11. Surface Functionalization of Black Phosphorus with Nitrenes: Identification of P=N Bonds Using Isotopic Labeling

    Kendahl Walz Mitra, Christine H. Chang, Michael P. Hanrahan, Jiaying Yang, Daniel Tofan, William M. Holden, Niranjan Govind, Gerald Seidler, Aaron J. Rossini, Alexandra Velian
  12. Anomaly-Induced sound Absorption in Weyl Semimetals

    Ohad Antebi, D. A. Pesin, A. V. Andreev, Roni Ilan
  13. Directly Visualizing the Momentum-Forbidden Dark Excitons and Their Dynamics in Atomically Thin Semiconductors

    Julien Madéo, Michael K. L. Man, Chakradhar Sahoo, Marshall Campbell, Vivek Pareek, E. Laine Wong, Abdullah Al-Mahboob, Nicholas S. Chan, Arka Karmakar, Bala Murali Krishna Mariserla, Xiaoqin Li, Tony F. Heinz, Ting Cao, Keshav M. Dani
  14. Conductivity of Superconductors in the Flux Flow Regime

    M. Smith, A. V. Andreev, M. V. Feigel’man, B. Z. Spivak
  15. Intertwined Topological and Magnetic Orders in Atomically Thin Chern Insulator MnBi2Te4

    Dmitry Ovchinnikov, Xiong Huang, Zhong Lin, Zaiyao Fei, Jiaqi Cai, Tiancheng Song, Minhao He, Qianni Jiang, Chong Wang, Hao Li, Yayu Wang, Yang Wu, Di Xiao, Jiun-Haw Chu, Jiaqiang Yan, Cui-Zu Chang, Yong-Tao Cui, Xiaodong Xu
  16. Low Temperature Emergence of an Orbital-Selective Mott Phase in FeTe1-xSex

    J. Huang, R. Yu, Z. Xu, J.-X. Zhu, Q. Jiang, M. Wang, H. Wu, T. Chen, J. D. Denlinger, S.-K. Mo, M. Hashimoto, G. Gu, P. Dai, J.-H. Chu, D. Lu, Q. Si, R. J. Birgeneau, M. Yi
  17. Determination of the Spin Axis in Quantum Spin Hall Insulator WTe2

    Wenjin Zhao, Elliott Runburg, Zaiyao Fei, Joshua Mutch, Paul Malinowski, Bosong Sun, Xiong Huang, Dmytro Pesin, Yong-Tao Cui, Xiaodong Xu, Jiun-Haw Chu, David H. Cobden
  18. Electrically Tunable Correlated and Topological States in Twisted Monolayer-Bilayer Graphene

    Shaowen Chen, Minhao He, Ya-Hui Zhang, Valerie Hsieh, Zaiyao Fei, K. Watanabe, T. Taniguchi, David H. Cobden, Xiaodong Xu, Cory R. Dean & Matthew Yankowitz
  19. Magnetic Domains and Domain Wall Pinning in Two-Dimensional Ferromagnets Revealed by Nanoscale Imaging

    Q.-C. Sun, T. Song, E. Anderson, T. Shalomayeva, J. Förster, A. Brunner, T. Taniguchi, K. Watanabe, J. Gräfe, R. Stöhr, X. Xu, J. Wrachtrup
  20. Symmetry Breaking in Twisted Double Bilayer Graphene

    Minhao He, Yuhao Li, Jiaqi Cai, Yang Liu, K. Watanabe, T. Taniguchi, Xiaodong Xu, Matthew Yankowitz
  21. Hydrodynamic Electron Transport Near Charge Neutrality

    Songci Li, Alex Levchenko, and A. V. Andreev
  22. Suppression of Superconductivity by Anisotropic Strain near a Nematic Quantum Critical Point

    Paul Malinowski, Qianni Jiang, Joshua J. Sanchez, Joshua Mutch, Zhaoyu Liu, Preston Went, Jian Liu, Philip J. Ryan, Jong-Woo Kim & Jiun-Haw Chu
  23. Hierarchical Nanosheets Built from Superatomic Clusters: Properties, Exfoliation and Single-Crystal-to-Single-Crystal Intercalation

    Jonathan A. Kephart, Catherine G. Romero, Chun-Chih Tseng, Kevin J. Anderton, Matthew Yankowitz, Werner Kaminsky and Alexandra Velian
  24. Nematic Fluctuations in an Orbital Selective Superconductor Fe1+yTe1−xSex

    Qianni Jiang, Yue Shi, Morten H. Christensen, Joshua Sanchez, Bevin Huang, Zhong Lin, Zhaoyu Liu, Paul Malinowski, Xiaodong Xu, Rafael M. Fernandes, Jiun-Haw Chu
  25. The Spontaneous Elastoresistivity Coefficient within the Nematic Ordered Phase of Iron Pnictides

    J. J Sanchez, P. Malinowski, J. Mutch, J. Liu, J-W. Kim, P. J. Ryan, J.-H. Chu
  26. Metasurface Integrated Monolayer Exciton Polariton

    Yueyang Chen, Shengnan Miao, Tianmeng Wang, Ding Zhong, Abhi Saxena, Colin Chow, James Whitehead, Dario Gerace, Xiaodong Xu, Su-Fei Shi, and Arka Majumdar
  27. Signature for Non-Stoner Ferromagnetism in the van der Waals Ferromagnet Fe3GeTe2

    X. Xu, Y. W. Li, S. R. Duan, S. L. Zhang, Y. J. Chen, L. Kang, A. J. Liang, C. Chen, W. Xia, Y. Xu, P. Malinowski, X. D. Xu, J.-H. Chu, G. Li, Y. F. Guo, Z. K. Liu, L. X. Yang, and Y. L. Chen
  28. Microscopic Model of Stacking-Fault Potential and Exciton Wave Function in GaAs

    Durnev, M.; Glazov M. M.; Linpeng X.; Viitaniemi M. L. K.; Matthews B.; Spurgeon S. R.; Sushko P. V.; Wieck A. D.; Ludwig A.; Fu K.-M. C.
  29. Magnetic Proximity and Nonreciprocal Current Switching in a Monolayer WTe2 Helical Edge

    Zhao, W.; Fei, Z.; Song, T.; Choi, H. K.; Palomaki, T.; Sun, B.; Malinowski, P.; McGuire, A. M.; Chu, J.-H.; Xu, X.; Cobden, D. C.
  30. Apparatus Design for Measuring of the Strain Dependence of the Seebeck Coefficient of Single Crystals

    Qian, T.; Mutch, J.; Wu, L.; Went, P.; Jiang, Q.; Malinowski, P.; Yang, J.; Chu, J.-H.
  31. Valley Phonons and Exciton Complexes in a Monolayer Semiconductor

    He, M.; Rivera, P.; Tuan, D. V.; Wilson, N. P.; Yang, M.; Taniguchi, T.; Watanabe, K.; Yan, J.; Mandrus, D. G.; Yu, H.; Dery, H.; Yao, W.; Xu, X.
  32. Coupling of Photonic Crystal Cavity and Interlayer Exciton in 2D Heterobilayer

    Rivera, P.; Fryett, T. K.; Chen, Y.; Liu, C-H.; Ray, E.; Hatami, F.; Yan, J.; Mandrus, D.; Yao, W.; Majumdar, A.; Xu, X.
  33. Switching 2D Magnetic States via Pressure Tuning of Layer Stacking

    Song, T.; Fei, Z.; Yankowitz, M.; Lin, Z.; Jiang, Q.; Hwangbo, K.; Zhang, Q.; Sun, B.; Taniguchi, T.; Watanabe, K.; McGuire, M. A.; Graf, D.; Cao, T.; Chu, J.-H.; Cobden, D. H.; Dean, C. R.; Xiao, D.; Xu, X.
  34. Visualizing Electrostatic Gating Effects in Two-Dimensional Heterostructures

    Nguyen, P.; Teutsch, N. C.; Wilson, N. P.; Kahn, J.; Xia, X.; Graham, A. J.; Kandyba, V.; Giampietri, A.; Barinov, A.; Constantinescu, G. C.; Yeung, N.; Hine, N. D. M.; Xu, X.; Cobden, D. H.; Wilson, N. R.
  35. Evidence for a Strain Tuned Topological Phase Transition in ZrTe5

    Mutch, J.; Chen, W-C.; Went, P.; Qian, T.; Wilson, I. Z.; Andreev, A.; Chen, C.-C., Chu, J.-H.
  36. Atomically Thin CrCl3: An In-Plane Layered Antiferromagnetic Insulator

    Cai, X.; Song, T.; Wilson, N. P.; Clark, G.; He, M.; Zhang, X.; Taniguchi, T.; Watanabe, K.; Yao, W.; Xiao, D.; McGuire, M. A.; Cobden, D. C.; Xu, X.
  37. Imaging Quantum Spin Hall Edges in Monolayer WTe2

    Shi, Y.; Kahn, J.; Niu, B.; Fei, Z.; Sun, B.; Cai, X.; Francisco, B. A.; Wu, D.; Shen, Z. X.; Xu, X.; Cobden, D. H.; Cui, Y. T.
  38. Voltage Control of a van der Waals Spin-Filter Magnetic Tunnel Junction

    Song, T.; Tu, W. Y.; Carnahan, C.; Cai, X.; Taniguchi, T.; Watanabe, K.; McGuire, M. A.; Cobden, D. H.; Xiao, D.; Yao, W.; Xu, X.
  39. Gate-Induced Superconductivity in a Monolayer Topological Insulator

    Sajadi, E.; Palomaki, T. A.; Fei, Z.; Zhao, W.; Bement, P.; Olsen, C.; Luescher, S.; Xu, X.; Folk, J. A.; Cobden, D. H.
  40. Ultrathin van der Waals Metalenses

    Liu, C-H.; Zheng, J.; Colburn, S.; Fryett, T. K.; Chen, Y.; Xu, X.; Majumdar, A.
  41. Deterministic Positioning of Colloidal Quantum Dots on Silicon Nitride Nanobeam Cavities

    Chen, Y.; Ryou, A.; Friedfeld, M. R.; Fryett, T.; Whitehead, J.; Cossairt, B. M.; Majumdar, A.
  42. Two-Dimensional Itinerant Ising Ferromagnetism in Atomically thin Fe3GeTe2

    Fei, Z.; Huang, B.; Malinowski, P.; Wang, W.; Song, T.; Sanchez, J.; Yao, W.; Xiao, D.; Zhu, X.; May, A.; Wu, W.; Cobden, D. H.; Chu, J.; Xu, X.
  43. Ferroelectric Switching of a Two-Dimensional Metal

    Fei, Z.; Zhao, W.; Palomaki, T. A.; Sun, B.; Miller, M. K.; Zhao, Z.; Yan, J.; Xu, X.; Cobden, D. H.
  44. Giant Tunneling Magnetoresistance in Spin-Filter van der Waals Heterostructures

    Song, T.; Cai, X.; Tu, M. W.; Zhang, X.; Huang, B.; Wilson, N. P.; Seyler, K. L.; Zhu, L.; Taniguchi, T.; Watanabe, K.; McGuire, M. A.; Cobden, D. H.; Xiao, D.; Yao, W.; Xu, X.
  45. Encapsulated Silicon Nitride Nanobeam Cavity for Nanophotonics using Layered Materials

    Fryett, T. K.; Chen, Y.; Whitehead, J.; Peycke, Z. M.; Xu, X.; Majumdar, A.