@article{f2381300d0cc45429b9952790620046e,
title = "Giant Valley-Polarized Rydberg Excitons in Monolayer WSe2Revealed by Magneto-photocurrent Spectroscopy",
abstract = "A strong Coulomb interaction could lead to a strongly bound exciton with high-order excited states, similar to the Rydberg atom. The interaction of giant Rydberg excitons can be engineered for a correlated ordered exciton array with a Rydberg blockade, which is promising for realizing quantum simulation. Monolayer transition metal dichalcogenides, with their greatly enhanced Coulomb interaction, are an ideal platform to host the Rydberg excitons in two dimensions. Here, we employ helicity-resolved magneto-photocurrent spectroscopy to identify Rydberg exciton states up to 11s in monolayer WSe2. Notably, the radius of the Rydberg exciton at 11s can be as large as 214 nm, orders of magnitude larger than the 1s exciton. The giant valley-polarized Rydberg exciton not only provides an exciting platform to study the strong exciton-exciton interaction and nonlinear exciton response but also allows the investigation of the different interplay between the Coulomb interaction and Landau quantization, tunable from a low- to high-magnetic-field limit.",
keywords = "11s exciton, Landau quantization, Rydberg exciton, Strong Coulomb interaction, photocurrent spectroscopy, valley polarization",
author = "Tianmeng Wang and Zhipeng Li and Yunmei Li and Zhengguang Lu and Shengnan Miao and Zhen Lian and Yuze Meng and Mark Blei and Takashi Taniguchi and Kenji Watanabe and Sefaattin Tongay and Dmitry Smirnov and Chuanwei Zhang and Shi, {Su Fei}",
note = "Funding Information: This work is primarily supported by AFOSR through Grant FA9550-18-1-0312. T.W. and S.-F.S. acknowledge support from ACS PRF through Grant 59957-DNI10. Z. Lian and S.-F.S. acknowledge support from NYSTAR through Focus Center-NY–RPI Contract C150117. The device fabrication was supported by the Micro and Nanofabrication Clean Room (MNCR) at Rensselaer Polytechnic Institute (RPI). S.T. acknowledges support from NSF DMR-1904716, DMR-1838443, CMMI-1933214, and DOE-SC0020653. K.W. and T.T. acknowledge support from the Elemental Strategy Initiative conducted by the MEXT, Japan, Grant Number JPMXP0112101001, JSPS KAKENHI Grant Numbers JP20H00354 and the CREST(JPMJCR15F3), JST. Z. Lu and D.S. acknowledge support from the US Department of Energy (DE-FG02-07ER46451) for magneto-photoluminescence measurements performed at the National High Magnetic Field Laboratory, which is supported by National Science Foundation through NSF/DMR-1644779 and the State of Florida. Y.L. and C.Z. are supported by AFOSR (Grant No. FA9550-16-1-0387), NSF (Grant No. PHY-1806227), and ARO (Grant No. W911NF-17-1-0128). S.-F.S. also acknowledges the support from NSF through Career Award DMR-1945420. Publisher Copyright: Copyright {\textcopyright} 2020 American Chemical Society.",
year = "2020",
month = oct,
day = "14",
doi = "10.1021/acs.nanolett.0c03167",
language = "English (US)",
volume = "20",
pages = "7635--7641",
journal = "Nano Letters",
issn = "1530-6984",
publisher = "American Chemical Society",
number = "10",
}