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Title: Skyrmion-induced bound states in a superconductor

Authors:
; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1297269
Grant/Contract Number:
E304
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 94; Journal Issue: 6; Related Information: CHORUS Timestamp: 2016-08-17 18:10:26; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English

Citation Formats

Pershoguba, Sergey S., Nakosai, Sho, and Balatsky, Alexander V. Skyrmion-induced bound states in a superconductor. United States: N. p., 2016. Web. doi:10.1103/PhysRevB.94.064513.
Pershoguba, Sergey S., Nakosai, Sho, & Balatsky, Alexander V. Skyrmion-induced bound states in a superconductor. United States. doi:10.1103/PhysRevB.94.064513.
Pershoguba, Sergey S., Nakosai, Sho, and Balatsky, Alexander V. Wed . "Skyrmion-induced bound states in a superconductor". United States. doi:10.1103/PhysRevB.94.064513.
@article{osti_1297269,
title = {Skyrmion-induced bound states in a superconductor},
author = {Pershoguba, Sergey S. and Nakosai, Sho and Balatsky, Alexander V.},
abstractNote = {},
doi = {10.1103/PhysRevB.94.064513},
journal = {Physical Review B},
number = 6,
volume = 94,
place = {United States},
year = {Wed Aug 17 00:00:00 EDT 2016},
month = {Wed Aug 17 00:00:00 EDT 2016}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1103/PhysRevB.94.064513

Citation Metrics:
Cited by: 2works
Citation information provided by
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  • The interaction between the surface of a 3D topological insulator and a skyrmion/anti-skyrmion structure is studied in order to investigate the possibility of electron confinement due to the skyrmion presence. Both hedgehog (Néel) and vortex (Bloch) skyrmions are considered. For the hedgehog skyrmion, the in-plane components cannot be disregarded and their interaction with the surface state of the topological insulator (TI) has to be taken into account. A semi-classical description of the skyrmion chiral angle is obtained using the variational principle. It is shown that both the hedgehog and the vortex skyrmion can induce bound states on the surface ofmore » the TI. However, the number and the properties of these states depend strongly on the skyrmion type and the skyrmion topological number N{sub Sk}. The probability densities of the bound electrons are also derived where it is shown that they are localized within the skyrmion region.« less
  • We have investigated the superconducting phase difference dependence of Andreev levels and Josephson current through a mesoscopic normal-metal layer in contact with two superconducting electrodes with {ital s}-wave and {ital d}-wave pairing symmetry ({ital S}{sub {ital sNS}}{sub {ital d}} junction). It is shown that, regardless of the junction length, due to the sign change of the {ital d}-wave order parameter under suitable arrangements, the zero-energy point of Andreev levels for the negative process appears at {var_phi}=0. In particular, at zero temperature, the amplitude of the total Josephson current through the point contact {ital S}{sub {ital sNS}}{sub {ital d}} junction couldmore » be enhanced by the sign change of the {ital d}-wave order parameter. However, for an {ital S}{sub {ital sNS}}{sub {ital d}} junction of special length, the amplitude of Josephson current may be suppressed by this sign change. Moreover, as a special case, the midgap surface states discovered by Hu [Phys. Rev. Lett. {bold 72}, 1526 (1994)] are recovered naturally. {copyright} {ital 1996 The American Physical Society.}« less