Observation of Dirac Node Formation and Mass Acquisition in a Topological Crystalline Insulator-Reference-Cited by-同舟云学术

Observation of Dirac Node Formation and Mass Acquisition in a Topological Crystalline Insulator

Published:2013-09-27 Issue:6153 Volume:341 Page:1496-1499
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Okada Yoshinori¹²,Serbyn Maksym³,Lin Hsin⁴,Walkup Daniel¹,Zhou Wenwen¹,Dhital Chetan¹,Neupane Madhab⁵,Xu Suyang⁵,Wang Yung Jui⁴,Sankar R.⁶,Chou Fangcheng⁶,Bansil Arun⁴,Hasan M. Zahid⁵⁷,Wilson Stephen D.¹,Fu Liang³,Madhavan Vidya¹

Affiliation:

1. Department of Physics, Boston College, Chestnut Hill, MA 02467, USA.

2. World Premier International–Advanced Institute for Materials Research, Tohoku University, Sendai, 980-8577, Japan.

3. Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139,USA.

4. Department of Physics, Northeastern University, Boston, MA 02115, USA.

5. Joseph Henry Laboratory, Department of Physics, Princeton University, Princeton, NJ 08544, USA.

6. Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan.

7. Princeton Center for Complex Materials, Princeton University, Princeton, NJ 08544, USA.

Abstract

Half-Massless Certain materials, such as topological crystalline insulators (TCIs), host robust surface states that have a Dirac (graphene-like) dispersion associated with massless carriers; the breaking of protective symmetry within such materials should cause the carriers to acquire mass. Okada et al. (p. 1496 , published online 29 August) used scanning tunneling microscopy to map out the energies of the electronic levels of the TCI Pb 1- x Sn x Se as a function of the strength of an external magnetic field. The massless Dirac fermions coexisted with massive ones, presumably as a consequence of a distortion of the crystalline structure affecting only one of the two mirror symmetries.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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