TY - JOUR
T1 - Disorder-dependent valley properties in monolayer WS e2
AU - Tran, Kha
AU - Singh, Akshay
AU - Seifert, Joe
AU - Wang, Yiping
AU - Hao, Kai
AU - Huang, Jing-Kai
AU - Li, Lain-Jong
AU - Taniguchi, Takashi
AU - Watanabe, Kenji
AU - Li, Xiaoqin
N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].
PY - 2017/7/18
Y1 - 2017/7/18
N2 - We investigate the effect of disorder on exciton valley polarization and valley coherence in monolayer WSe2. By analyzing the polarization properties of photoluminescence, the valley coherence (VC) and valley polarization (VP) are quantified across the inhomogeneously broadened exciton resonance. We find that disorder plays a critical role in the exciton VC, while affecting VP less. For different monolayer samples with disorder characterized by their Stokes shift (SS), VC decreases in samples with higher SS while VP does not follow a simple trend. These two methods consistently demonstrate that VC as defined by the degree of linearly polarized photoluminescence is more sensitive to disorder, motivating further theoretical studies. © 2017 American Physical Society.
AB - We investigate the effect of disorder on exciton valley polarization and valley coherence in monolayer WSe2. By analyzing the polarization properties of photoluminescence, the valley coherence (VC) and valley polarization (VP) are quantified across the inhomogeneously broadened exciton resonance. We find that disorder plays a critical role in the exciton VC, while affecting VP less. For different monolayer samples with disorder characterized by their Stokes shift (SS), VC decreases in samples with higher SS while VP does not follow a simple trend. These two methods consistently demonstrate that VC as defined by the degree of linearly polarized photoluminescence is more sensitive to disorder, motivating further theoretical studies. © 2017 American Physical Society.
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U2 - 10.1103/PhysRevB.96.041302
DO - 10.1103/PhysRevB.96.041302
M3 - RGC 21 - Publication in refereed journal
SN - 2469-9950
VL - 96
JO - Physical Review B
JF - Physical Review B
IS - 4
M1 - 041302
ER -