Yamamoto, K. T., Shiomi, Y., Segawa, Kouji, Ando, Yoichi ORCID: 0000-0002-3553-3355 and Saitoh, E. (2016). Universal scaling for the spin-electricity conversion on surface states of topological insulators. Phys. Rev. B, 94 (2). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

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Abstract

We have investigated spin-electricity conversion on surface states of bulk-insulating topological insulator (TI) materials using a spin-pumping technique. The sample structure is Ni-Fe|Cu|TI trilayers, in which magnetic proximity effects on the TI surfaces are negligibly small owing to the inserted Cu layer. Voltage signals produced by the spin-electricity conversion are clearly observed and are enhanced with decreasing temperature, in line with the dominant surface transport at lower temperatures. The efficiency of the spin-electricity conversion is greater for TI samples with a higher resistivity of bulk states and longer mean free path of surface states, consistent with the surface spin-electricity conversion.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Yamamoto, K. T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Shiomi, Y.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Segawa, KoujiUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ando, YoichiUNSPECIFIEDorcid.org/0000-0002-3553-3355UNSPECIFIED
Saitoh, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-270142
DOI: 10.1103/PhysRevB.94.024404
Journal or Publication Title: Phys. Rev. B
Volume: 94
Number: 2
Date: 2016
Publisher: AMER PHYSICAL SOC
Place of Publication: COLLEGE PK
ISSN: 2469-9969
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
TORQUEMultiple languages
Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed MatterMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/27014

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