Band Engineering of Dirac Semimetals Using Charge Density Waves

Shiming Lei, Samuel M.L. Teicher, Andreas Topp, Kehan Cai, Jingjing Lin, Guangming Cheng, Tyger H. Salters, Fanny Rodolakis, Jessica L. McChesney, Saul Lapidus, Nan Yao, Maxim Krivenkov, Dmitry Marchenko, Andrei Varykhalov, Christian R. Ast, Roberto Car, Jennifer Cano, Maia G. Vergniory, N. Phuan Ong, Leslie M. Schoop

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

New developments in the field of topological matter are often driven by materials discovery, including novel topological insulators, Dirac semimetals, and Weyl semimetals. In the last few years, large efforts have been made to classify all known inorganic materials with respect to their topology. Unfortunately, a large number of topological materials suffer from non-ideal band structures. For example, topological bands are frequently convoluted with trivial ones, and band structure features of interest can appear far below the Fermi level. This leaves just a handful of materials that are intensively studied. Finding strategies to design new topological materials is a solution. Here, a new mechanism is introduced, which is based on charge density waves and non-symmorphic symmetry, to design an idealized Dirac semimetal. It is then shown experimentally that the antiferromagnetic compound GdSb0.46Te1.48 is a nearly ideal Dirac semimetal based on the proposed mechanism, meaning that most interfering bands at the Fermi level are suppressed. Its highly unusual transport behavior points to a thus far unknown regime, in which Dirac carriers with Fermi energy very close to the node seem to gradually localize in the presence of lattice and magnetic disorder.

Original languageEnglish (US)
Article number2101591
JournalAdvanced Materials
Volume33
Issue number30
DOIs
StatePublished - Jul 28 2021

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Keywords

  • Dirac semimetals
  • charge density waves
  • nonsymmorphic symmetry

Fingerprint

Dive into the research topics of 'Band Engineering of Dirac Semimetals Using Charge Density Waves'. Together they form a unique fingerprint.

Cite this