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Article: Interplay between topological insulators and superconductors

TitleInterplay between topological insulators and superconductors
Authors
Issue Date2012
PublisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/
Citation
Physical Review B - Condensed Matter And Materials Physics, 2012, v. 85 n. 4 How to Cite?
AbstractTopological insulators are insulating in the bulk but possess metallic surface states protected by time-reversal symmetry. Here, we report on a detailed electronic transport study in high-quality Bi 2Se 3 topological insulator thin films contacted by superconducting (In, Al, and W) electrodes. The resistance of the film shows an abrupt and significant upturn when the electrodes become superconducting. In turn, the Bi 2Se 3 film greatly weakens the superconductivity of the electrodes, significantly reducing both their transition temperatures and their critical fields. A possible interpretation of these results is that the superconducting electrodes are accessing the surface states and the experimental results are consequences of the interplay between the Cooper pairs of the electrodes and the spin-polarized current of the surface states in Bi 2Se 3. © 2012 American Physical Society.
Persistent Identifierhttp://hdl.handle.net/10722/144568
ISSN
2014 Impact Factor: 3.736
2013 SCImago Journal Rankings: 2.143
ISI Accession Number ID
Funding AgencyGrant Number
Pennsylvania State University Materials Research Science and Engineering Center under US National Science FoundationDMR-0820404
National Basic Research Program of China2012CB921300
Research Grant Council of the Hong Kong Special Administrative RegionHKU 7061/10P
HKU 10/CRF/08
(Chinese) National Science Foundation
Ministry of Science and Technology of China
National Natural Science Foundation of China11174007
Funding Information:

This work was supported by the Pennsylvania State University Materials Research Science and Engineering Center under US National Science Foundation Grant No. DMR-0820404, the National Basic Research Program of China (Grant No. 2012CB921300), the General Research Fund (Grant No. HKU 7061/10P) and Collaborative Research Fund (Grant No. HKU 10/CRF/08) from the Research Grant Council of the Hong Kong Special Administrative Region, the (Chinese) National Science Foundation, the Ministry of Science and Technology of China, the National Natural Science Foundation of China (Grant No. 11174007). We are grateful to J. Jain, X. Qi, S. Zhang, L. Fu, C. Liu, Y. Ran, and M. Tian for illuminating discussions.

References

 

DC FieldValueLanguage
dc.contributor.authorWang, Jen_HK
dc.contributor.authorChang, CZen_HK
dc.contributor.authorLi, Hen_HK
dc.contributor.authorHe, Ken_HK
dc.contributor.authorZhang, Den_HK
dc.contributor.authorSingh, Men_HK
dc.contributor.authorMa, XCen_HK
dc.contributor.authorSamarth, Nen_HK
dc.contributor.authorXie, Men_HK
dc.contributor.authorXue, QKen_HK
dc.contributor.authorChan, MHWen_HK
dc.date.accessioned2012-02-03T06:14:14Z-
dc.date.available2012-02-03T06:14:14Z-
dc.date.issued2012en_HK
dc.identifier.citationPhysical Review B - Condensed Matter And Materials Physics, 2012, v. 85 n. 4en_HK
dc.identifier.issn1098-0121en_HK
dc.identifier.urihttp://hdl.handle.net/10722/144568-
dc.description.abstractTopological insulators are insulating in the bulk but possess metallic surface states protected by time-reversal symmetry. Here, we report on a detailed electronic transport study in high-quality Bi 2Se 3 topological insulator thin films contacted by superconducting (In, Al, and W) electrodes. The resistance of the film shows an abrupt and significant upturn when the electrodes become superconducting. In turn, the Bi 2Se 3 film greatly weakens the superconductivity of the electrodes, significantly reducing both their transition temperatures and their critical fields. A possible interpretation of these results is that the superconducting electrodes are accessing the surface states and the experimental results are consequences of the interplay between the Cooper pairs of the electrodes and the spin-polarized current of the surface states in Bi 2Se 3. © 2012 American Physical Society.en_HK
dc.languageengen_US
dc.publisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/en_HK
dc.relation.ispartofPhysical Review B - Condensed Matter and Materials Physicsen_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong Licenseen_US
dc.rightsPhysical Review B (Condensed Matter and Materials Physics). Copyright © American Physical Society.-
dc.titleInterplay between topological insulators and superconductorsen_HK
dc.typeArticleen_HK
dc.identifier.emailLi, H: hdli1978@hkucc.hku.hken_HK
dc.identifier.emailXie, M: mhxie@hku.hken_HK
dc.identifier.authorityLi, H=rp00739en_HK
dc.identifier.authorityXie, M=rp00818en_HK
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1103/PhysRevB.85.045415en_HK
dc.identifier.scopuseid_2-s2.0-84863011627en_HK
dc.identifier.hkuros198604en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84863011627&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume85en_HK
dc.identifier.issue4en_HK
dc.identifier.spage045415-1en_US
dc.identifier.epage045415-7en_US
dc.identifier.isiWOS:000298987700002-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridWang, J=36077615400en_HK
dc.identifier.scopusauthoridChang, CZ=36238000700en_HK
dc.identifier.scopusauthoridLi, H=36441549600en_HK
dc.identifier.scopusauthoridHe, K=8726956700en_HK
dc.identifier.scopusauthoridZhang, D=36242590000en_HK
dc.identifier.scopusauthoridSingh, M=55469484200en_HK
dc.identifier.scopusauthoridMa, XC=14011898800en_HK
dc.identifier.scopusauthoridSamarth, N=7006288661en_HK
dc.identifier.scopusauthoridXie, M=7202255416en_HK
dc.identifier.scopusauthoridXue, QK=7201986973en_HK
dc.identifier.scopusauthoridChan, MHW=8048092200en_HK

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