Observation of trion Rydberg states in monolayer MoSe<sub>2</sub>

Chun Hung Lui; Erfu Liu; Jeremiah van Baren; Takashi Taniguchi; Kenji Watanabe; Hongyi Yu; Wang Yao; Zhengguang Lu; Dmitry Smirnov

Observation of trion Rydberg states in monolayer MoSe₂

ORAL

Abstract

Trions in monolayer transition metal dichalcogenides (TMDs) attract much attention due to their large binding energy (20 ~ 50 meV). The high stability of trions makes them possible to form excited states. Here we report the observation of trion Rydberg states in monolayer TMD. By measuring the photoluminescence of ultraclean boron-nitride-encapsulated MoSe₂, we reveal the first and second excited Rydberg states of trions. The excited-state trions exhibit much stronger interaction with the Fermi sea as well as higher valley polarization and coherence than the ground-state trions. The results reveal rich physics of few-body quantum states in two-dimensional systems.

March 4, 2019, 8:48 AM – March 4, 2019, 9:00 AM

Presenters

Chun Hung Lui

Department of Physics and Astronomy, University of California, Riverside, University of California, Riverside

Authors

Chun Hung Lui

Department of Physics and Astronomy, University of California, Riverside, University of California, Riverside
Erfu Liu

University of California, Riverside
Jeremiah van Baren

University of California, Riverside
Takashi Taniguchi

National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305 0044, Japan, National Institute for Materials Science, Advanced Materials Laboratory, National Institute for Materials Science, , 1-1 Namiki, Tsukuba 305-0044, Japan, National Institute for Material Science, 1-1 Namiki, Tsukuba 305-0044, National Institute of Materials Science, NIMS, Japan, Advanced Materials Laboratory, NIMS, National Institute for Materials Science, Tsukuba, Japan, Advanced Materials Laboratory, National Institute for Materials Science, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0044, Japan, National Institute for Materials Science (NIMS), NIMS Tsukuba, NIMS, National Institute for Material Science, National Institute for Materials Science, Japan, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Japan, National Institute for Materials Science , Japan, Advanced Materials Laboratory, National Institute for Materials Science, Japan, Advanced Materials Laboratory, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan, National Institute for Materials Science, Tsukuba, Ibaraki 305- 0044, Japan, National Institute for Material Science - Japan, National Institute for Materials Science, Namiki Tsukuba Ibaraki, Japan, National Institute of Material Science, Advanced Material Lab, NIMS, Advanced Materials Laboratory, National Institute for Materials Science, Tsukuba, Japan, Advanced Materials Laboratory, National Institute for Materials Science, Tsukuba, Ibaraki, Japan, National Institute for Materials Science, Tsukuba, 1-1 Namiki, Tsukuba, National Institute for Materials Science, NIMS/Tsukuba, National Institute for Materials Science, 1-1 Namiki, Tsukuba, 305-0044 Japan, National Institute for Materials Science, Namiki, 305-0044, Japan, National Institute for Material Science, Japan, Advanced Materials Laboratory, NIMS, Japan, Advanced Materials Labaratory, National Institute for Materials Science, National Institute of Material Science, 1-1 Namiki, Tsukuba, Ibaraki 205-0044, Japan, National Institute of Materials Science, Japan
Kenji Watanabe

National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305 0044, Japan, Advanced Materials Laboratory, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan, National Institute for Materials Science, Advanced Materials Laboratory, National Institute for Materials Science, , 1-1 Namiki, Tsukuba 305-0044, Japan, National Institute for Material Science, 1-1 Namiki, Tsukuba 305-0044, National Institute of Materials Science, NIMS, Japan, Advanced Materials Laboratory, NIMS, National Institute for Materials Science, Tsukuba, Japan, National Institute for Materials Science, Japan, Advanced Materials Laboratory, National Institute for Materials Science, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0044, Japan, National Institute for Materials Science (NIMS), NIMS Tsukuba, National Institute for Materials Science (Japan), NIMS, National Institute for Material Science, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Japan, National Institute for Materials Science , Japan, National Institute for Materials Science, Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan., Advanced Materials Laboratory, National Institute for Materials Science, Japan, Advanced Materials Laboratory, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan, National Institute for Materials Science, Tsukuba, Ibaraki 305- 0044, Japan, National Institute for Material Science - Japan, National Institute for Materials Science, Namiki Tsukuba Ibaraki, Japan, National Institute of Material Science, Advanced Material Lab, NIMS, Advanced Materials Laboratory, National Institute for Materials Science, Tsukuba, Japan, Advanced Materials Laboratory, National Institute for Materials Science, Tsukuba, Ibaraki, Japan, National Institute for Materials Science, Tsukuba, 1-1 Namiki, Tsukuba, National Institute for Materials Science, NIMS/Tsukuba, National Institute for Materials Science, 1-1 Namiki, Tsukuba, 305-0044 Japan, National Institute for Materials Science, Namiki, 305-0044, Japan, National Institute for Material Science, Japan, Advanced Materials Laboratory, NIMS, Japan, Columbia University, Advanced Materials Labaratory, National Institute for Materials Science, National Institute of Material Science, 1-1 Namiki, Tsukuba, Ibaraki 205-0044, Japan, National Institute of Materials Science, Japan
Hongyi Yu

The University of Hong Kong, Department of Physics and Center of Theoretical and Computational Physics, University of Hong Kong
Wang Yao

The University of Hong Kong, University of Hong Kong, Department of Physics and Center of Theoretical and Computational Physics, University of Hong Kong, Physics, The University of Hong Kong
Zhengguang Lu

National High Magnetic Field Laboratory, National High Magnetic Field Lab, Condensed Matter Science, National High Magnetic Field Laboratory
Dmitry Smirnov

National High Magnetic Field Laboratory, Natl High Magnetic Field Lab, National High Magnetic Field Lab, Condensed Matter Science, National High Magnetic Field Laboratory