Observation and control of maximal Chern numbers in a chiral topological semimetal-Reference-Cited by-同舟云学术

Observation and control of maximal Chern numbers in a chiral topological semimetal

Published:2020-07-10 Issue:6500 Volume:369 Page:179-183
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Schröter Niels B. M.¹^ORCID,Stolz Samuel²³^ORCID,Manna Kaustuv⁴^ORCID,de Juan Fernando⁵⁶^ORCID,Vergniory Maia G.⁵⁶,Krieger Jonas A.¹⁷⁸^ORCID,Pei Ding⁹,Schmitt Thorsten¹,Dudin Pavel¹⁰^ORCID,Kim Timur K.¹⁰^ORCID,Cacho Cephise¹⁰^ORCID,Bradlyn Barry¹¹^ORCID,Borrmann Horst⁴^ORCID,Schmidt Marcus⁴,Widmer Roland²^ORCID,Strocov Vladimir N.¹,Felser Claudia⁴^ORCID

Affiliation:

1. Swiss Light Source, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland.

2. EMPA, Swiss Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland.

3. Institute of Condensed Matter Physics, Station 3, EPFL, 1015 Lausanne, Switzerland.

4. Max Planck Institute for Chemical Physics of Solids, Dresden D-01187, Germany.

5. Donostia International Physics Center, 20018 Donostia-San Sebastian, Spain.

6. IKERBASQUE, Basque Foundation for Science, Maria Diaz de Haro 3, 48013 Bilbao, Spain.

7. Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland.

8. Laboratorium für Festkörperphysik, ETH Zurich, CH-8093 Zurich, Switzerland.

9. Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, UK.

10. Diamond Light Source, Didcot OX11 0DE, UK.

11. Department of Physics and Institute for Condensed Matter Theory, University of Illinois at Urbana-Champaign, Urbana, IL 61801-3080, USA.

Abstract

A very high Chern number Topologically nontrivial electronic structure can often be characterized by the Chern number, the value of which is related to the magnitude of some of the exotic effects predicted to occur in such systems. Many topological phases discovered so far have a Chern number of 1 or 2, but higher values are also theoretically possible. Schröter et al. predicted that the chiral material palladium gallium (PdGa) would have a Chern number of 4, and they confirmed that prediction using photoemission experiments. Interestingly, the sign of the Chern number was opposite for the two enantiomers of PdGa. Science , this issue p. 179

Funder

H2020 European Research Council

Swiss National Science Foundation

Deutsche Forschungsgemeinschaft DFG

Deutschen Forschungsgemeinschaft, DFG,

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference48 articles.

1. Quantized Hall Conductance in a Two-Dimensional Periodic Potential

2. Topological invariant and the quantization of the Hall conductance