Disentanglement of Surface and Bulk Rashba Spin Splittings in Noncentrosymmetric BiTeI

Gabriel Landolt, Sergey V. Eremeev, Yury M. Koroteev, Bartosz Slomski, Stefan Muff, Titus Neupert, Masaki Kobayashi, Vladimir N. Strocov, Thorsten Schmitt, Ziya S. Aliev, Mahammad B. Babanly, Imamaddin R. Amiraslanov, Evgueni V. Chulkov, Jürg Osterwalder, and J. Hugo Dil
Phys. Rev. Lett. 109, 116403 – Published 13 September 2012
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Abstract

BiTeI has a layered and noncentrosymmetric structure where strong spin-orbit interaction leads to a giant Rashba spin splitting in the bulk bands. We present direct measurements of the bulk band structure obtained with soft x-ray angle-resolved photoemission (ARPES), revealing the three-dimensional Fermi surface. The observed spindle torus shape bears the potential for a topological transition in the bulk by hole doping. Moreover, the bulk electronic structure is clearly disentangled from the two-dimensional surface electronic structure by means of high-resolution and spin-resolved ARPES measurements in the ultraviolet regime. All findings are supported by ab initio calculations.

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  • Received 10 April 2012

DOI:https://doi.org/10.1103/PhysRevLett.109.116403

© 2012 American Physical Society

Authors & Affiliations

Gabriel Landolt1,2, Sergey V. Eremeev3,4, Yury M. Koroteev3,4, Bartosz Slomski1,2, Stefan Muff1, Titus Neupert2, Masaki Kobayashi2, Vladimir N. Strocov2, Thorsten Schmitt2, Ziya S. Aliev5, Mahammad B. Babanly5, Imamaddin R. Amiraslanov6, Evgueni V. Chulkov7, Jürg Osterwalder1, and J. Hugo Dil1,2

  • 1Physik-Institut, Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
  • 2Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen, Switzerland
  • 3Institute of Strength Physics and Materials Science, Russian Academy of Sciences, Siberian Branch, Akademicheskiy prospekt 2/4, Tomsk, 634021, Russia
  • 4Tomsk State University, Tomsk, 634050, Russia
  • 5General and Inorganic Chemistry Department, Baku State University, Baku, AZ1148, Azerbaijan
  • 6Institute of Physics, Azerbaijan National Academy of Science, Baku, AZ1143, Azerbaijan
  • 7Donostia International Physics Center (DIPS) and CFM, Centro Mixto CSIC-UPV/EHU, Departamento de Física de Materiales, UPV/EHU, 20080 San Sebastián, Spain

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Issue

Vol. 109, Iss. 11 — 14 September 2012

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