Observation of a Highly Spin Polarized Topological Surface State in GeBi$_{2}$Te$_{4}$

K. Okamoto; K. Kuroda; H. Miyahara; K. Miyamoto; T. Okuda; Z. S. Aliev; M. B. Babanly; I. R. Amiraslanov; K. Shimada; H. Namatame; M. Taniguchi; E. V. Chulkov; A. Kimura

doi:10.1103/PhysRevB.86.195304

Observation of a Highly Spin Polarized Topological Surface State in GeBi$_{2}$Te$_{4}$

Mesoscale and Nanoscale Physics 2015-06-05 v1

Authors: K. Okamoto , K. Kuroda , H. Miyahara , K. Miyamoto , T. Okuda , Z. S. Aliev , M. B. Babanly , I. R. Amiraslanov , K. Shimada , H. Namatame , M. Taniguchi , E. V. Chulkov , A. Kimura

View on arXiv ↗ PDF ↗ DOI ↗

Abstract

Spin polarization of a topological surface state for GeBi $_2$ Te $_4$ , the newly discovered three-dimensional topological insulator, has been studied by means of the state of the art spin- and angle-resolved photoemission spectroscopy. It has been revealed that the disorder in the crystal has a minor effect on the surface state spin polarization and it exceeds 75% near the Dirac point in the bulk energy gap region ( $\sim$ 180 meV). This new finding for GeBi $_{2}$ Te $_{4}$ promises not only to realize a highly spin polarized surface isolated transport but to add new functionality to its thermoelectric and thermomagnetic properties.

Keywords

topological insulator spin polarization surface state GeBi2Te4 spin-ARPES Dirac point bulk energy gap

Cite

@article{arxiv.1207.2088,
  title  = {Observation of a Highly Spin Polarized Topological Surface State in GeBi$_{2}$Te$_{4}$},
  author = {K. Okamoto and K. Kuroda and H. Miyahara and K. Miyamoto and T. Okuda and Z. S. Aliev and M. B. Babanly and I. R. Amiraslanov and K. Shimada and H. Namatame and M. Taniguchi and E. V. Chulkov and A. Kimura},
  journal= {arXiv preprint arXiv:1207.2088},
  year   = {2015}
}

Comments

5 pages, 4 figures

Observation of a Highly Spin Polarized Topological Surface State in GeBi$_{2}$Te$_{4}$

Abstract

Keywords

Cite

Comments

Related papers