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Title: Spin coherence and dephasing of localized electrons in monolayer MoS 2

Here, we report a systematic study of coherent spin precession and spin dephasing in electron-doped monolayer MoS 2. Using time-resolved Kerr rotation spectroscopy and applied in-plane magnetic fields, a nanosecond time scale Larmor spin precession signal commensurate with g-factor |g 0| ≃ 1.86 is observed in several different MoS 2 samples grown by chemical vapor deposition. The dephasing rate of this oscillatory signal increases linearly with magnetic field, suggesting that the coherence arises from a subensemble of localized electron spins having an inhomogeneously broadened distribution of g-factors, g 0 + Δg. In contrast to g 0, Δg is sample-dependent and ranges from 0.042 to 0.115.
Authors:
 [1] ;  [2] ;  [3] ;  [3] ;  [2] ;  [1]
  1. National High Magnetic Field Lab., Los Alamos, NM (United States)
  2. Rice Univ., Houston, TX (United States)
  3. Naval Research Lab., Washington, D.C. (United States)
Publication Date:
Report Number(s):
LA-UR-15-28148
Journal ID: ISSN 1530-6984
Grant/Contract Number:
AC52-06NA25396
Type:
Accepted Manuscript
Journal Name:
Nano Letters
Additional Journal Information:
Journal Volume: 15; Journal Issue: 12; Journal ID: ISSN 1530-6984
Publisher:
American Chemical Society
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; high magnetic field science; 2D Semiconductor; dichalcogenide; monolayer MoS2; spin coherence
OSTI Identifier:
1334146

Yang, Luyi, Chen, Weibing, McCreary, Kathleen M., Jonker, Berend T., Lou, Jun, and Crooker, Scott A.. Spin coherence and dephasing of localized electrons in monolayer MoS2. United States: N. p., Web. doi:10.1021/acs.nanolett.5b03771.
Yang, Luyi, Chen, Weibing, McCreary, Kathleen M., Jonker, Berend T., Lou, Jun, & Crooker, Scott A.. Spin coherence and dephasing of localized electrons in monolayer MoS2. United States. doi:10.1021/acs.nanolett.5b03771.
Yang, Luyi, Chen, Weibing, McCreary, Kathleen M., Jonker, Berend T., Lou, Jun, and Crooker, Scott A.. 2015. "Spin coherence and dephasing of localized electrons in monolayer MoS2". United States. doi:10.1021/acs.nanolett.5b03771. https://www.osti.gov/servlets/purl/1334146.
@article{osti_1334146,
title = {Spin coherence and dephasing of localized electrons in monolayer MoS2},
author = {Yang, Luyi and Chen, Weibing and McCreary, Kathleen M. and Jonker, Berend T. and Lou, Jun and Crooker, Scott A.},
abstractNote = {Here, we report a systematic study of coherent spin precession and spin dephasing in electron-doped monolayer MoS2. Using time-resolved Kerr rotation spectroscopy and applied in-plane magnetic fields, a nanosecond time scale Larmor spin precession signal commensurate with g-factor |g0| ≃ 1.86 is observed in several different MoS2 samples grown by chemical vapor deposition. The dephasing rate of this oscillatory signal increases linearly with magnetic field, suggesting that the coherence arises from a subensemble of localized electron spins having an inhomogeneously broadened distribution of g-factors, g0 + Δg. In contrast to g0, Δg is sample-dependent and ranges from 0.042 to 0.115.},
doi = {10.1021/acs.nanolett.5b03771},
journal = {Nano Letters},
number = 12,
volume = 15,
place = {United States},
year = {2015},
month = {11}
}