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Condensed Matter > Mesoscale and Nanoscale Physics

arXiv:1606.07933 (cond-mat)
[Submitted on 25 Jun 2016]

Title:Work function of bulk-insulating topological insulator Bi2-xSbxTe3-ySey

Authors:Daichi Takane, Seigo Souma, Takafumi Sato, Takashi Takahashi, Kouji Segawa, Yoichi Ando
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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 work function in Bi2-xSbxTe3-ySey by high-resolution photoemission spectroscopy. The obtained work-function values (4.95-5.20 eV) show a systematic variation with the composition, well tracking 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.
Comments: 4pages, 2 figures
Subjects: Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Strongly Correlated Electrons (cond-mat.str-el)
Cite as: arXiv:1606.07933 [cond-mat.mes-hall]
  (or arXiv:1606.07933v1 [cond-mat.mes-hall] for this version)
  https://doi.org/10.48550/arXiv.1606.07933
Related DOI: https://doi.org/10.1063/1.4961987

Submission history

From: Seigo Souma [view email]
[v1] Sat, 25 Jun 2016 17:10:08 UTC (463 KB)
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