Universität zu Köln

Li, Mingda ORCID: 0000-0002-7055-6368, Dai, Zuyang, Cui, Wenping ORCID: 0000-0002-9900-5092, Wang, Zhe ORCID: 0000-0003-4103-0751, Katmis, Ferhat, Wang, Jiayue, Le, Peisi, Wu, Lijun and Zhu, Yimei (2014). Tunable THz surface plasmon polariton based on a topological insulator/layered superconductor hybrid structure. Phys. Rev. B, 89 (23). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

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Abstract

We theoretically investigate the surface plasmon polariton (SPP) at the interface between a three-dimensional strong topological insulator (TI) and a layered superconductor/magnetic insulator structure, within the random phase approximation. The tunability of the SPP through electronic doping can be enhanced when the magnetic permeability of the layered structure becomes higher. When the interface is gapped by superconductivity or perpendicular magnetism, the SPP dispersion is further distorted, accompanied by a shift of group velocity and penetration depth. Such a shift of the SPP reaches a maximum when the magnitude of the Fermi level approaches the gap value, and may lead to observable effects. The tunable SPP at the interface between layered-superconductor and magnetic materials in proximity to the TI surface may provide new insight in the detection of Majorana fermions.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Li, Mingda UNSPECIFIED orcid.org/0000-0002-7055-6368 UNSPECIFIED Dai, Zuyang UNSPECIFIED UNSPECIFIED UNSPECIFIED Cui, Wenping UNSPECIFIED orcid.org/0000-0002-9900-5092 UNSPECIFIED Wang, Zhe UNSPECIFIED orcid.org/0000-0003-4103-0751 UNSPECIFIED Katmis, Ferhat UNSPECIFIED UNSPECIFIED UNSPECIFIED Wang, Jiayue UNSPECIFIED UNSPECIFIED UNSPECIFIED Le, Peisi UNSPECIFIED UNSPECIFIED UNSPECIFIED Wu, Lijun UNSPECIFIED UNSPECIFIED UNSPECIFIED Zhu, Yimei UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-435621
DOI:	10.1103/PhysRevB.89.235432
Journal or Publication Title:	Phys. Rev. B
Volume:	89
Number:	23
Date:	2014
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	2469-9969
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language GRAPHENE PLASMONICS; METAMATERIALS; DEVICES Multiple languages Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/43562