Weak topological insulator with protected gapless helical states
Physical Review B Volume 84 Issue 3
Page 035443-
published_at 2011
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| File | |
| Title ( eng ) |
Weak topological insulator with protected gapless helical states
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| Creator |
Tanaka Akihiro
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| Source Title |
Physical Review B
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| Volume | 84 |
| Issue | 3 |
| Start Page | 035443 |
| Abstract |
A workable model for describing dislocation lines introduced into a three-dimensional topological insulator is proposed. We show how fragile surface Dirac cones of a weak topological insulator evolve into protected gapless helical modes confined to the vicinity of a dislocation line. It is demonstrated that surface Dirac cones of a topological insulator (either strong or weak) acquire a finite-size energy gap when the surface is deformed into a cylinder penetrating the otherwise surfaceless system. We show that, when a dislocation with a nontrivial Burgers vector is introduced, the finite-size energy gap plays the role of stabilizing the one-dimensional gapless states.
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| NDC |
Physics [ 420 ]
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| Language |
eng
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| Resource Type | journal article |
| Publisher |
American Physical Society
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| Date of Issued | 2011 |
| Rights |
(c) 2011 American Physical Society
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| Publish Type | Version of Record |
| Access Rights | open access |
| Source Identifier |
[ISSN] 1098-0121
[DOI] 10.1103/PhysRevB.84.035443
[NCID] AA11187113
[DOI] http://dx.doi.org/10.1103/PhysRevB.84.035443
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