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Title: Coexistence of type-II Dirac point and weak topological phase in Pt 3 Sn

Abstract

Intriguing topological phases may appear in both insulating and semimetallic states. Topological insulators exhibit topologically nontrivial band inversion, while topological Dirac/Weyl semimetals show “relativistic” linear band crossings. Here, we report an unusual topological state of Pt 3Sn, where the two topological features appear simultaneously. Based on first-principles calculations, we show that Pt 3Sn is a three-dimensional weak topological semimetal with topologically nontrivial band inversion between the valence and conduction bands, where the band structure also possesses type-II Dirac points at the boundary of two electron pockets. The formation of the Dirac points can be understood in terms of the representations of relevant symmetry groups and the compatibility relations. The topological surface states appear in accordance with the nontrivial bulk band topology. As a result, the unique coexistence of the two distinct topological features in Pt 3Sn enlarges the material scope in topological physics, and is potentially useful for spintronics.

Authors:
 [1];  [1];  [1]
  1. Ames Lab. and Iowa State Univ., Ames, IA (United States)
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1409680
Alternate Identifier(s):
OSTI ID: 1407440
Report Number(s):
IS-J-9495
Journal ID: ISSN 2469-9950; PRBMDO
Grant/Contract Number:  
AC02-07CH11358; AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 96; Journal Issue: 20; 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

Kim, Minsung, Wang, Cai -Zhuang, and Ho, Kai -Ming. Coexistence of type-II Dirac point and weak topological phase in Pt3Sn. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.96.205107.
Kim, Minsung, Wang, Cai -Zhuang, & Ho, Kai -Ming. Coexistence of type-II Dirac point and weak topological phase in Pt3Sn. United States. doi:10.1103/PhysRevB.96.205107.
Kim, Minsung, Wang, Cai -Zhuang, and Ho, Kai -Ming. Mon . "Coexistence of type-II Dirac point and weak topological phase in Pt3Sn". United States. doi:10.1103/PhysRevB.96.205107. https://www.osti.gov/servlets/purl/1409680.
@article{osti_1409680,
title = {Coexistence of type-II Dirac point and weak topological phase in Pt3Sn},
author = {Kim, Minsung and Wang, Cai -Zhuang and Ho, Kai -Ming},
abstractNote = {Intriguing topological phases may appear in both insulating and semimetallic states. Topological insulators exhibit topologically nontrivial band inversion, while topological Dirac/Weyl semimetals show “relativistic” linear band crossings. Here, we report an unusual topological state of Pt3Sn, where the two topological features appear simultaneously. Based on first-principles calculations, we show that Pt3Sn is a three-dimensional weak topological semimetal with topologically nontrivial band inversion between the valence and conduction bands, where the band structure also possesses type-II Dirac points at the boundary of two electron pockets. The formation of the Dirac points can be understood in terms of the representations of relevant symmetry groups and the compatibility relations. The topological surface states appear in accordance with the nontrivial bulk band topology. As a result, the unique coexistence of the two distinct topological features in Pt3Sn enlarges the material scope in topological physics, and is potentially useful for spintronics.},
doi = {10.1103/PhysRevB.96.205107},
journal = {Physical Review B},
number = 20,
volume = 96,
place = {United States},
year = {2017},
month = {11}
}

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Cited by: 4 works
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    Works referencing / citing this record:

    Semi-metals as potential thermoelectric materials
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    Semi-metals as potential thermoelectric materials
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