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Title: Quantum transport properties of monolayer graphene with antidot lattice

Abstract

Quantum transport properties in monolayer graphene are sensitive to structural modifications. In this work we find that the introduction of a hexagonal lattice of antidots has a wide impact on weak localization and Shubnikov-de Haas (SdH) oscillation of graphene. The antidot lattice reduces both phase coherence and intervalley scattering length. Remarkably, even with softened intervalley scattering, i.e., the phase-breaking time is shorter than intervalley scattering time, coherence between time reversed states remains adequate to retain weak localization, an offbeat and rarely reported occurrence. Whereas SdH oscillation is boosted by the antidot lattice, the amplitude of the SdH signal rises rapidly with the increasing antidot radius. But both effective mass and carrier density are reduced in a larger antidot lattice. A bandgap of ~10 meV is opened. The antidot lattice is an effective dopant-free way to manipulate electronic properties in graphene.

Authors:
ORCiD logo [1];  [2];  [3];  [4];  [2];  [3]
  1. Yale Univ. West Campus, West Haven, CT (United States); Univ. of South Carolina, Columbia, SC (United States)
  2. Benedict College, Columbia, SC (United States)
  3. Univ. of South Carolina, Columbia, SC (United States)
  4. Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)
Publication Date:
Research Org.:
Florida A & M University, Tallahassee, FL (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF); State of Florida
OSTI Identifier:
1614546
Alternate Identifier(s):
OSTI ID: 1558710
Grant/Contract Number:  
NA0002630; DMR-1157490
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 126; Journal Issue: 8; Journal ID: ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Physics; Crystal lattices; Magnetic ordering; Electronic bandstructure; Transport properties; Shubnikov-de Haas effect; Graphene; Resistivity measurements; Landau levels; Quantum coherence; Geometric phases

Citation Formats

Wang, Leizhi, Yin, Ming, Zhong, Bochen, Jaroszynski, Jan, Mbamalu, Godwin, and Datta, Timir. Quantum transport properties of monolayer graphene with antidot lattice. United States: N. p., 2019. Web. doi:10.1063/1.5100813.
Wang, Leizhi, Yin, Ming, Zhong, Bochen, Jaroszynski, Jan, Mbamalu, Godwin, & Datta, Timir. Quantum transport properties of monolayer graphene with antidot lattice. United States. https://doi.org/10.1063/1.5100813
Wang, Leizhi, Yin, Ming, Zhong, Bochen, Jaroszynski, Jan, Mbamalu, Godwin, and Datta, Timir. Fri . "Quantum transport properties of monolayer graphene with antidot lattice". United States. https://doi.org/10.1063/1.5100813. https://www.osti.gov/servlets/purl/1614546.
@article{osti_1614546,
title = {Quantum transport properties of monolayer graphene with antidot lattice},
author = {Wang, Leizhi and Yin, Ming and Zhong, Bochen and Jaroszynski, Jan and Mbamalu, Godwin and Datta, Timir},
abstractNote = {Quantum transport properties in monolayer graphene are sensitive to structural modifications. In this work we find that the introduction of a hexagonal lattice of antidots has a wide impact on weak localization and Shubnikov-de Haas (SdH) oscillation of graphene. The antidot lattice reduces both phase coherence and intervalley scattering length. Remarkably, even with softened intervalley scattering, i.e., the phase-breaking time is shorter than intervalley scattering time, coherence between time reversed states remains adequate to retain weak localization, an offbeat and rarely reported occurrence. Whereas SdH oscillation is boosted by the antidot lattice, the amplitude of the SdH signal rises rapidly with the increasing antidot radius. But both effective mass and carrier density are reduced in a larger antidot lattice. A bandgap of ~10 meV is opened. The antidot lattice is an effective dopant-free way to manipulate electronic properties in graphene.},
doi = {10.1063/1.5100813},
journal = {Journal of Applied Physics},
number = 8,
volume = 126,
place = {United States},
year = {Fri Aug 23 00:00:00 EDT 2019},
month = {Fri Aug 23 00:00:00 EDT 2019}
}

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