Universität zu Köln

Takane, Daichi, Souma, Seigo, Sato, Takafumi ORCID: 0000-0002-4544-5463, Takahashi, Takashi, Segawa, Kouji and Ando, Yoichi ORCID: 0000-0002-3553-3355 (2016). Work function of bulk-insulating topological insulator Bi2-xSbxTe3-ySey. Appl. Phys. Lett., 109 (9). MELVILLE: AMER INST PHYSICS. ISSN 1077-3118

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Abstract

Recent discovery of bulk insulating topological insulator (TI) Bi2-xSbxTe3-ySey paved a pathway toward practical device application of TIs. For realizing TI-based devices, it is necessary to contact TIs with a metal. Since the band-bending at the interface dominates the character of devices, knowledge of TIs' work function is of essential importance. We have determined the compositional dependence of the work function in Bi2-xSbxTe3-ySey by high-resolution photoemission spectroscopy. The obtained work-function values (4.95-5.20 eV) track the energy shift of the surface chemical potential seen by angle-resolved photoemission spectroscopy. The present result serves as a useful guide for developing TI-based electronic devices. Published by AIP Publishing.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Takane, Daichi UNSPECIFIED UNSPECIFIED UNSPECIFIED Souma, Seigo UNSPECIFIED UNSPECIFIED UNSPECIFIED Sato, Takafumi UNSPECIFIED orcid.org/0000-0002-4544-5463 UNSPECIFIED Takahashi, Takashi UNSPECIFIED UNSPECIFIED UNSPECIFIED Segawa, Kouji UNSPECIFIED UNSPECIFIED UNSPECIFIED Ando, Yoichi UNSPECIFIED orcid.org/0000-0002-3553-3355 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-266218
DOI:	10.1063/1.4961987
Journal or Publication Title:	Appl. Phys. Lett.
Volume:	109
Number:	9
Date:	2016
Publisher:	AMER INST PHYSICS
Place of Publication:	MELVILLE
ISSN:	1077-3118
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Physics > Institute of Physics II
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language SPIN-POLARIZED CURRENTS; ELECTRICAL DETECTION; SURFACE; BI2SE3; BI1.5SB0.5TE1.7SE1.3; BI2TE2SE; TORQUE Multiple languages Physics, Applied Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/26621