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

Title: Edge states and local electronic structure around an adsorbed impurity in a topological superconductor

Abstract

Recently, topological superconducting states have attracted much interest. In this work, we consider a topological superconductor with Z 2 topological mirror order [Y.-Y. Tai et al., Phys. Rev. B 91, 041111(R) (2015)] and s ±-wave superconducting pairing symmetry, within a two-orbital model originally designed for iron-based superconductivity [Y.-Y. Tai et al., Europhys. Lett. 103, 67001 (2013)]. We predict the existence of gapless edge states. We also study the local electronic structure around an adsorbed interstitial magnetic impurity in the system, and find the existence of low-energy in-gap bound states even with a weak spin polarization on the impurity. We also discuss the relevance of our results to a recent scanning tunneling microscopy experiment on a Fe(Te,Se) compound with an adsorbed Fe impurity [J.-X. Yin et al., Nat. Phys. 11, 543 (2015)], for which our density functional calculations show the Fe impurity is spin polarized.

Authors:
 [1];  [1];  [1];  [2];  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Univ. of Houston, Houston, TX (United States). Texas Center for Superconductivity and Dept. of Physics
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE Laboratory Directed Research and Development (LDRD) Program; Robert A. Welch Foundation; US Air Force Office of Scientific Research (AFOSR)
OSTI Identifier:
1457246
Alternate Identifier(s):
OSTI ID: 1226095
Report Number(s):
LA-UR-15-24366
Journal ID: ISSN 1098-0121; PRBMDO; TRN: US1901329
Grant/Contract Number:  
AC52-06NA25396; E-1146; FA9550-09-1-0656
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 92; Journal Issue: 17; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE

Citation Formats

Tai, Yuan-Yen, Choi, Hongchul, Ahmed, Towfiq, Ting, C. S., and Zhu, Jian-Xin. Edge states and local electronic structure around an adsorbed impurity in a topological superconductor. United States: N. p., 2015. Web. doi:10.1103/PhysRevB.92.174514.
Tai, Yuan-Yen, Choi, Hongchul, Ahmed, Towfiq, Ting, C. S., & Zhu, Jian-Xin. Edge states and local electronic structure around an adsorbed impurity in a topological superconductor. United States. doi:10.1103/PhysRevB.92.174514.
Tai, Yuan-Yen, Choi, Hongchul, Ahmed, Towfiq, Ting, C. S., and Zhu, Jian-Xin. Mon . "Edge states and local electronic structure around an adsorbed impurity in a topological superconductor". United States. doi:10.1103/PhysRevB.92.174514. https://www.osti.gov/servlets/purl/1457246.
@article{osti_1457246,
title = {Edge states and local electronic structure around an adsorbed impurity in a topological superconductor},
author = {Tai, Yuan-Yen and Choi, Hongchul and Ahmed, Towfiq and Ting, C. S. and Zhu, Jian-Xin},
abstractNote = {Recently, topological superconducting states have attracted much interest. In this work, we consider a topological superconductor with Z2 topological mirror order [Y.-Y. Tai et al., Phys. Rev. B 91, 041111(R) (2015)] and s±-wave superconducting pairing symmetry, within a two-orbital model originally designed for iron-based superconductivity [Y.-Y. Tai et al., Europhys. Lett. 103, 67001 (2013)]. We predict the existence of gapless edge states. We also study the local electronic structure around an adsorbed interstitial magnetic impurity in the system, and find the existence of low-energy in-gap bound states even with a weak spin polarization on the impurity. We also discuss the relevance of our results to a recent scanning tunneling microscopy experiment on a Fe(Te,Se) compound with an adsorbed Fe impurity [J.-X. Yin et al., Nat. Phys. 11, 543 (2015)], for which our density functional calculations show the Fe impurity is spin polarized.},
doi = {10.1103/PhysRevB.92.174514},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 17,
volume = 92,
place = {United States},
year = {2015},
month = {11}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 2 works
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

Generalized Gradient Approximation Made Simple
journal, October 1996

  • Perdew, John P.; Burke, Kieron; Ernzerhof, Matthias
  • Physical Review Letters, Vol. 77, Issue 18, p. 3865-3868
  • DOI: 10.1103/PhysRevLett.77.3865

Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set
journal, October 1996


From ultrasoft pseudopotentials to the projector augmented-wave method
journal, January 1999