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

Abstract

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:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1334146
Report Number(s):
LA-UR-15-28148
Journal ID: ISSN 1530-6984
Grant/Contract Number:  
AC52-06NA25396
Resource 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
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

Citation Formats

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., 2015. 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. Tue . "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}
}

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