235 citations · 717 across the 17 of their papers we have counts for
10 papers · 1 filter
Gate-tunable chiral spin mode in WSe2/WS2 moiré superlattices
Zhexu Shan, Wenjian Su, Kenji Watanabe +4
The interplay between many-body and spin-orbit effects (SOC) can lead to novel phenomena in solids. Chiral spin modes (CSM) are collective spin excitations that arise from such int…
Gate-tunable hot electron extraction in a two-dimensional semiconductor heterojunction
Chenran Xu, Chen Xu, Jichen Zhou +9
Hot carrier solar cells (HCSCs), harvesting excess energy of the hot carriers generated by above-band-gap photoexcitation, is crucial for pushing the solar cell efficiency beyond t…
Stripe phases in WSe2/WS2 moiré superlattices
Chenhao Jin, Zui Tao, Tingxin Li +10
Stripe phases, in which the rotational symmetry of charge density is spontaneously broken, occur in many strongly correlated systems with competing interactions. One representative…
Long valley lifetime of dark excitons in single-layer WSe2
Yanhao Tang, Kin Fai Mak, Jie Shan
Single-layer transition metal dichalcogenides (TMDs) provide a promising material system to explore the electron's valley degree of freedom as a quantum information carrier. The va…
Optical Stark metrology of CdSe quantum dots: Reconciling the size-dependent oscillator strength with theory
Yanhao Tang, Mersedeh Saniepay, Chenjia Mi +2
The effective mass approximation (EMA) predicts large, nearly size-independent exciton oscillator strengths in quantum confined semiconductors. Yet, experimental reports…
Layer- and Frequency-Dependent Second Harmonic Generation in Reflection from GaSe Atomic Crystals
Yanhao Tang, Krishna C. Mandal, John A. McGuire +1
We report optical second-harmonic generation (SHG) in reflection from GaSe crystals of 1 to more than 100 layers using a fundamental picosecond pulsed pump at 1.58 eV and a superco…
Optical Spin Polarization Dynamics in GaSe Nanoslabs
Yanhao Tang, Wei Xie, Krishna C. Mandal +2
We report nearly complete preservation of "spin memory" between optical absorption and photoluminescence (PL) in nanometer slabs of GaSe pumped with up to 0.2 eV excess energy. At…
Exciton spin dynamics in GaSe
Yanhao Tang, Wei Xie, Krishna C. Mandal +2
We analyze exciton spin dynamics in GaSe under nonresonant circularly polarized optical pumping with an exciton spin-flip rate-equation model. The model reproduces polarized time-d…
Linearly polarized remote-edge luminescence in GaSe nanoslabs
Yanhao Tang, Wei Xie, Krishna C. Mandal +2
We report highly linearly polarized remote luminescence that emerges at the cleaved edges of nanoscale gallium selenide slabs tens of micrometers away from the optical excitation s…
Near Unity Optical Spin Polarization in GaSe Nanoslabs
Yanhao Tang, Wei Xie, Krishna C. Mandal +2
We report nearly complete preservation of "spin memory" between optical absorption and photoluminescence (PL) in nanometer slabs of GaSe pumped with 0.2 eV excess energy. At cryoge…