期刊
PHYSICAL REVIEW LETTERS
卷 111, 期 2, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.111.026601
关键词
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资金
- NRI-NSF [DMR-1124601]
- NSF [ECCS-1231570]
- DTRA [HDTRA1-13-1-0013]
- Direct For Mathematical & Physical Scien [1124601] Funding Source: National Science Foundation
- Division Of Materials Research [1124601] Funding Source: National Science Foundation
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [1231570] Funding Source: National Science Foundation
We present a theory that elucidates the major momentum and spin relaxation processes for electrons, holes, and hot excitons in monolayer transition-metal dichalcogenides. We expand on spin flips induced by flexural phonons and show that the spin relaxation is ultrafast for electrons in free-standing membranes while being mitigated in supported membranes. This behavior due to interaction with flexural phonons is universal in two-dimensional membranes that respect mirror symmetry, and it leads to a counterintuitive inverse relation between mobility and spin relaxation.
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