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Title: Photon energy and polarization-dependent electronic structure of Cr-doped Bi 2 Se 3

Abstract

In this article, we report a comparative study of the electronic structure of Cr-doped and pristine Bi2Se3. Circular dichroism and photon-energy-dependent angle-resolved photoemission experiments were performed. Even though the surface states seen on the Cr-doped samples are gapped, they exhibit strong circular dichroism, for which we provide its origin in accordance with the nontrivial band structure of the bulk. We note the surface electronic structure measurements with linear and circular polarized light show signatures that the orbital composition of the surface states is changed with Cr doping. Our observations not only provide further spectroscopic information about topological materials, but also promotes an alternative experimental tool to control their spin-orbital texture.

Authors:
ORCiD logo [1];  [2];  [1];  [1];  [3]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
  3. Univ. of Connecticut, Storrs, CT (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); University of Connecticut; USDOE Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1603288
Report Number(s):
BNL-213681-2020-JAAM
Journal ID: ISSN 2475-9953; PRMHAR
Grant/Contract Number:  
SC0012704; 4626510
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Materials
Additional Journal Information:
Journal Volume: 4; Journal Issue: 2; Journal ID: ISSN 2475-9953
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Yilmaz, T., Gu, G. D., Vescovo, E., Kaznatcheev, K., and Sinkovic, B. Photon energy and polarization-dependent electronic structure of Cr-doped Bi2Se3. United States: N. p., 2020. Web. https://doi.org/10.1103/PhysRevMaterials.4.024201.
Yilmaz, T., Gu, G. D., Vescovo, E., Kaznatcheev, K., & Sinkovic, B. Photon energy and polarization-dependent electronic structure of Cr-doped Bi2Se3. United States. https://doi.org/10.1103/PhysRevMaterials.4.024201
Yilmaz, T., Gu, G. D., Vescovo, E., Kaznatcheev, K., and Sinkovic, B. Wed . "Photon energy and polarization-dependent electronic structure of Cr-doped Bi2Se3". United States. https://doi.org/10.1103/PhysRevMaterials.4.024201. https://www.osti.gov/servlets/purl/1603288.
@article{osti_1603288,
title = {Photon energy and polarization-dependent electronic structure of Cr-doped Bi2Se3},
author = {Yilmaz, T. and Gu, G. D. and Vescovo, E. and Kaznatcheev, K. and Sinkovic, B.},
abstractNote = {In this article, we report a comparative study of the electronic structure of Cr-doped and pristine Bi2Se3. Circular dichroism and photon-energy-dependent angle-resolved photoemission experiments were performed. Even though the surface states seen on the Cr-doped samples are gapped, they exhibit strong circular dichroism, for which we provide its origin in accordance with the nontrivial band structure of the bulk. We note the surface electronic structure measurements with linear and circular polarized light show signatures that the orbital composition of the surface states is changed with Cr doping. Our observations not only provide further spectroscopic information about topological materials, but also promotes an alternative experimental tool to control their spin-orbital texture.},
doi = {10.1103/PhysRevMaterials.4.024201},
journal = {Physical Review Materials},
number = 2,
volume = 4,
place = {United States},
year = {2020},
month = {2}
}

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