skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Topological phase transitions and quantum Hall effect in the graphene family

Abstract

Monolayer staggered materials of the graphene family present intrinsic spin-orbit coupling and can be driven through several topological phase transitions using external circularly polarized lasers and static electric or magnetic fields. We show how topological features arising from photoinduced phase transitions and the magnetic-field-induced quantum Hall effect coexist in these materials and simultaneously impact their Hall conductivity through their corresponding charge Chern numbers. We also show that the spectral response of the longitudinal conductivity contains signatures of the various phase-transition boundaries, that the transverse conductivity encodes information about the topology of the band structure, and that both present resonant peaks which can be unequivocally associated with one of the four inequivalent Dirac cones present in these materials. As a result, this complex optoelectronic response can be probed with straightforward Faraday rotation experiments, allowing the study of the crossroads between quantum Hall physics, spintronics, and valleytronics.

Authors:
 [1]; ORCiD logo [2]; ORCiD logo [2]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1435530
Alternate Identifier(s):
OSTI ID: 1434180
Report Number(s):
LA-UR-17-30904
Journal ID: ISSN 2469-9950; PRBMDO
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 97; Journal Issue: 16; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Energy Sciences; Material Science

Citation Formats

Ledwith, Patrick John, Kort-Kamp, Wilton Junior de Melo, and Dalvit, Diego Alejandro Roberto. Topological phase transitions and quantum Hall effect in the graphene family. United States: N. p., 2018. Web. doi:10.1103/PhysRevB.97.165426.
Ledwith, Patrick John, Kort-Kamp, Wilton Junior de Melo, & Dalvit, Diego Alejandro Roberto. Topological phase transitions and quantum Hall effect in the graphene family. United States. doi:10.1103/PhysRevB.97.165426.
Ledwith, Patrick John, Kort-Kamp, Wilton Junior de Melo, and Dalvit, Diego Alejandro Roberto. Sun . "Topological phase transitions and quantum Hall effect in the graphene family". United States. doi:10.1103/PhysRevB.97.165426.
@article{osti_1435530,
title = {Topological phase transitions and quantum Hall effect in the graphene family},
author = {Ledwith, Patrick John and Kort-Kamp, Wilton Junior de Melo and Dalvit, Diego Alejandro Roberto},
abstractNote = {Monolayer staggered materials of the graphene family present intrinsic spin-orbit coupling and can be driven through several topological phase transitions using external circularly polarized lasers and static electric or magnetic fields. We show how topological features arising from photoinduced phase transitions and the magnetic-field-induced quantum Hall effect coexist in these materials and simultaneously impact their Hall conductivity through their corresponding charge Chern numbers. We also show that the spectral response of the longitudinal conductivity contains signatures of the various phase-transition boundaries, that the transverse conductivity encodes information about the topology of the band structure, and that both present resonant peaks which can be unequivocally associated with one of the four inequivalent Dirac cones present in these materials. As a result, this complex optoelectronic response can be probed with straightforward Faraday rotation experiments, allowing the study of the crossroads between quantum Hall physics, spintronics, and valleytronics.},
doi = {10.1103/PhysRevB.97.165426},
journal = {Physical Review B},
number = 16,
volume = 97,
place = {United States},
year = {Sun Apr 15 00:00:00 EDT 2018},
month = {Sun Apr 15 00:00:00 EDT 2018}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on April 15, 2019
Publisher's Version of Record

Save / Share: