@article{9fadb473757e43dab47b079a76c48404,
title = "Nanoscale Conductivity Imaging of Correlated Electronic States in WSe2/WS2 Moir{\'e} Superlattices",
abstract = "We report the nanoscale conductivity imaging of correlated electronic states in angle-aligned WSe2/WS2 heterostructures using microwave impedance microscopy. The noncontact microwave probe allows us to observe the Mott insulating state with one hole per moir{\'e} unit cell that persists for temperatures up to 150 K, consistent with other characterization techniques. In addition, we identify for the first time a Mott insulating state at one electron per moir{\'e} unit cell. Appreciable inhomogeneity of the correlated states is directly visualized in the heterobilayer region, indicative of local disorders in the moir{\'e} superlattice potential or electrostatic doping. Our work provides important insights on 2D moir{\'e} systems down to the microscopic level.",
author = "Zhaodong Chu and Regan, {Emma C.} and Xuejian Ma and Danqing Wang and Zifan Xu and Utama, {M. Iqbal Bakti} and Kentaro Yumigeta and Mark Blei and Kenji Watanabe and Takashi Taniguchi and Sefaattin Tongay and Feng Wang and Keji Lai",
note = "Funding Information: The work at UT-Austin (Z. C., X. M., and Z. X., and K. L.) was supported by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences, under Award No. DE-SC0019025. The MIM instrumentation is supported by the Welch Foundation Grant No. F-1814. The ODRC measurements are supported by the Director, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231 (van der Waals heterostructures program, KCWF16). The heterostructure fabrication is supported by the U.S. Army Research Office under MURI Grant No. W911NF-17-1-0312. K. W. and T. T. acknowledge support from the Elemental Strategy Initiative conducted by the MEXT, Japan, Grant No. JPMXP0112101001, JSPS KAKENHI Grant No. JP20H00354 and the CREST (JPMJCR15F3), JST. S. T acknowledges support from DOE-SC0020653, NSF DMR 1552220, DMR 1904716, and NSF CMMI 1933214. E. C. R. acknowledges support from the Department of Defense (DoD) through the National Defense Science & Engineering Graduate Fellowship (NDSEG) Program. The authors also thank H. Li and S. Li for sharing unpublished scanning tunneling microscopy results on samples. Publisher Copyright: {\textcopyright} 2020 American Physical Society.",
year = "2020",
month = oct,
day = "30",
doi = "10.1103/PhysRevLett.125.186803",
language = "English (US)",
volume = "125",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "18",
}