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

This content will become publicly available on September 20, 2020

Title: High harmonic generation in magnetically-doped topological insulators

Abstract

As a new class of condensed matter, topological insulators challenge the traditional wisdom of condensed matter physics. Doping topological insulators with magnetic elements can realize the quantum anomalous Hall state, a two-dimensional bulk insulator with non-zero Chern number. High harmonic generation (HHG) has emerged as a very promising tool to probe electronic prop- erties. However, its application to magnetically doped topological insulators has not been realized. Here, we predict that high harmonics from six quintuple layers of Bi 2Se 3 (6QL-Bi 2Se 3 ) carry crucial information about its structure. HHG sensitively depends on crystal symmetry and laser polarization. While in the parent compound 6QL-Bi 2Se 3 all the harmonic orders are odd, once it is doped with a magnetic Cr atom, selective even and odd harmonics appear, depending on whether the laser field is in-plane or out-of-plane. With spin-orbit coupling, both even and odd harmonics appear. We find that these seemingly complicated harmonics have a simple origin: microscopic interplay between symmetry operations and laser polarization. Our finding demonstrates the unexplored power of HHG in topological insulators and will have a broad impact on future research.

Authors:
 [1];  [2];  [1];  [1];  [1];  [3]
  1. Lanzhou Univ. (China). Key Lab. for Magnetism and Magnetic Materials of the Ministry of Education; Lanzhou Univ. (China). Key Lab. of Special Function Materials and Structure Design of the Ministry of Education
  2. Lanzhou Univ. (China). Key Lab. for Magnetism and Magnetic Materials of the Ministry of Education; Lanzhou Univ. (China). Key Lab. of Special Function Materials and Structure Design of the Ministry of Education; Indiana State Univ., Terre Haute, IN (United States). Dept. of Physics
  3. Changshu Institute of Technology, Chanshu (China). College of Physics and Electronic Engineering
Publication Date:
Research Org.:
Indiana State Univ., Terre Haute, IN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1563123
Grant/Contract Number:  
FG02-06ER46304
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 100; Journal Issue: 12; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Jia, Lei, Zhang, Zhiya, Yang, D. Z., Si, M. S., Zhang, G. P., and Liu, Y. S. High harmonic generation in magnetically-doped topological insulators. United States: N. p., 2019. Web. doi:10.1103/PhysRevB.100.125144.
Jia, Lei, Zhang, Zhiya, Yang, D. Z., Si, M. S., Zhang, G. P., & Liu, Y. S. High harmonic generation in magnetically-doped topological insulators. United States. doi:10.1103/PhysRevB.100.125144.
Jia, Lei, Zhang, Zhiya, Yang, D. Z., Si, M. S., Zhang, G. P., and Liu, Y. S. Fri . "High harmonic generation in magnetically-doped topological insulators". United States. doi:10.1103/PhysRevB.100.125144.
@article{osti_1563123,
title = {High harmonic generation in magnetically-doped topological insulators},
author = {Jia, Lei and Zhang, Zhiya and Yang, D. Z. and Si, M. S. and Zhang, G. P. and Liu, Y. S.},
abstractNote = {As a new class of condensed matter, topological insulators challenge the traditional wisdom of condensed matter physics. Doping topological insulators with magnetic elements can realize the quantum anomalous Hall state, a two-dimensional bulk insulator with non-zero Chern number. High harmonic generation (HHG) has emerged as a very promising tool to probe electronic prop- erties. However, its application to magnetically doped topological insulators has not been realized. Here, we predict that high harmonics from six quintuple layers of Bi2Se3 (6QL-Bi2Se3 ) carry crucial information about its structure. HHG sensitively depends on crystal symmetry and laser polarization. While in the parent compound 6QL-Bi2Se3 all the harmonic orders are odd, once it is doped with a magnetic Cr atom, selective even and odd harmonics appear, depending on whether the laser field is in-plane or out-of-plane. With spin-orbit coupling, both even and odd harmonics appear. We find that these seemingly complicated harmonics have a simple origin: microscopic interplay between symmetry operations and laser polarization. Our finding demonstrates the unexplored power of HHG in topological insulators and will have a broad impact on future research.},
doi = {10.1103/PhysRevB.100.125144},
journal = {Physical Review B},
number = 12,
volume = 100,
place = {United States},
year = {2019},
month = {9}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on September 20, 2020
Publisher's Version of Record

Save / Share:

Works referenced in this record:

Topological insulators in Bi2Se3, Bi2Te3 and Sb2Te3 with a single Dirac cone on the surface
journal, May 2009

  • Zhang, Haijun; Liu, Chao-Xing; Qi, Xiao-Liang
  • Nature Physics, Vol. 5, Issue 6, p. 438-442
  • DOI: 10.1038/nphys1270

Topological field theory of time-reversal invariant insulators
journal, November 2008

  • Qi, Xiao-Liang; Hughes, Taylor L.; Zhang, Shou-Cheng
  • Physical Review B, Vol. 78, Issue 19, Article No. 195424
  • DOI: 10.1103/PhysRevB.78.195424