Open Access
Physical Review Letters, volume 123, issue 5, publication number 056801
Topological Protection Brought to Light by the Time-Reversal Symmetry Breaking
Piatrusha S. U.
1
,
Tikhonov E. S.
1, 2
,
KVON Z. D.
3, 4
,
Mikhailov N. N.
3, 4
,
Dvoretsky S. A.
3
,
Khrapai Vadim S.
1, 5
Publication type: Journal Article
Publication date: 2019-07-29
Journal:
Physical Review Letters
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor: 8.6
ISSN: 00319007, 10797114
General Physics and Astronomy
Abstract
Recent topological band theory distinguishes electronic band insulators with respect to various symmetries and topological invariants, most commonly, the time reversal symmetry and the $\rm Z_2$ invariant. The interface of two topologically distinct insulators hosts a unique class of electronic states -- the helical states, which shortcut the gapped bulk and exhibit spin-momentum locking. The magic and so far elusive property of the helical electrons, known as topological protection, prevents them from coherent backscattering as long as the underlying symmetry is preserved. Here we present an experiment which brings to light the strength of topological protection in one-dimensional helical edge states of a $\rm Z_2$ quantum spin-Hall insulator in HgTe. At low temperatures, we observe the dramatic impact of a tiny magnetic field, which results in an exponential increase of the resistance accompanied by giant mesoscopic fluctuations and a gap opening. This textbook Anderson localization scenario emerges only upon the time-reversal symmetry breaking, bringing the first direct evidence of the topological protection strength in helical edge states.
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- We do not take into account publications that without a DOI.
- Statistics recalculated only for publications connected to researchers, organizations and labs registered on the platform.
- Statistics recalculated weekly.
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Piatrusha S. U. et al. Topological Protection Brought to Light by the Time-Reversal Symmetry Breaking // Physical Review Letters. 2019. Vol. 123. No. 5. 056801
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Piatrusha S. U., Tikhonov E. S., KVON Z. D., Mikhailov N. N., Dvoretsky S. A., Khrapai V. S. Topological Protection Brought to Light by the Time-Reversal Symmetry Breaking // Physical Review Letters. 2019. Vol. 123. No. 5. 056801
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TY - JOUR
DO - 10.1103/PhysRevLett.123.056801
UR - https://doi.org/10.1103%2FPhysRevLett.123.056801
TI - Topological Protection Brought to Light by the Time-Reversal Symmetry Breaking
T2 - Physical Review Letters
AU - Piatrusha, S. U.
AU - Tikhonov, E. S.
AU - KVON, Z. D.
AU - Mikhailov, N. N.
AU - Dvoretsky, S. A.
AU - Khrapai, Vadim S.
PY - 2019
DA - 2019/07/29 00:00:00
PB - American Physical Society (APS)
IS - 5
VL - 123
SN - 0031-9007
SN - 1079-7114
ER -
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@article{2019_Piatrusha,
author = {S. U. Piatrusha and E. S. Tikhonov and Z. D. KVON and N. N. Mikhailov and S. A. Dvoretsky and Vadim S. Khrapai},
title = {Topological Protection Brought to Light by the Time-Reversal Symmetry Breaking},
journal = {Physical Review Letters},
year = {2019},
volume = {123},
publisher = {American Physical Society (APS)},
month = {jul},
url = {https://doi.org/10.1103%2FPhysRevLett.123.056801},
number = {5},
doi = {10.1103/PhysRevLett.123.056801}
}