CaltechAUTHORS
  A Caltech Library Service

Direct observation of spin-polarized surface states in the parent compound of a topological insulator using spin- and angle-resolved photoemission spectroscopy in a Mott-polarimetry mode

Hsieh, D. and Wray, L. and Qian, D. and Xia, Y. and Dil, J. H. and Meier, F. and Patthey, L. and Osterwalder, J. and Bihlmayer, G. and Hor, Y. S. and Cava, R. J. and Hasan, M. Z. (2010) Direct observation of spin-polarized surface states in the parent compound of a topological insulator using spin- and angle-resolved photoemission spectroscopy in a Mott-polarimetry mode. New Journal of Physics, 12 (12). Art. No. 125001. ISSN 1367-2630. http://resolver.caltech.edu/CaltechAUTHORS:20140815-135044188

[img] PDF - Published Version
Creative Commons Attribution.

1574Kb

Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:20140815-135044188

Abstract

We report high-resolution spin-resolved photoemission spectroscopy (spin-ARPES) measurements on the parent compound Sb of the recently discovered three-dimensional topological insulator Bi_(1–x)Sb_x (Hsieh et al 2008 Nature 452 970, Hsieh et al 2009 Science 323 919). By modulating the incident photon energy, we are able to map both the bulk and the (111) surface band structure, from which we directly demonstrate that the surface bands are spin polarized by the spin–orbit interaction and connect the bulk valence and conduction bands in a topologically non-trivial way. A unique asymmetric Dirac surface state gives rise to a k-splitting of its spin-polarized electronic channels. These results complement our previously published works on this class of materials and re-confirm our discovery of topological insulator states in the Bi_(1–x)Sb_x series.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1088/1367-2630/12/12/125001DOIArticle
http://iopscience.iop.org/1367-2630/12/12/125001/fulltext/PublisherArticle
ORCID:
AuthorORCID
Hsieh, D.0000-0002-0812-955X
Additional Information:© 2010 The Authors. Authors, their institutions and third parties all have the same rights to reuse articles published in New Journal of Physics in accordance with the Creative Commons Attribution 3.0 Unported (CC-BY) license. Received 22 January 2010. Published 1 December 2010. We thank C L Kane for theoretical discussions.
Issue or Number:12
Record Number:CaltechAUTHORS:20140815-135044188
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20140815-135044188
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:48623
Collection:CaltechAUTHORS
Deposited By: Joy Painter
Deposited On:20 Aug 2014 22:50
Last Modified:22 Aug 2019 22:32

Repository Staff Only: item control page