Surface electronic structure of the topological Kondo-insulator candidate correlated electron system SmB6

M. Neupane, N. Alidoust, S-Y. Xu, T. Kondo, Y. Ishida, D. J. Kim, Chang Liu, I. Belopolski, Y. J. Jo, T-R. Chang, H-T. Jeng, T. Durakiewicz, L. Balicas, H. Lin, A. Bansil, S. Shin, Z. Fisk and M. Z. Hasan ()
Additional contact information
M. Neupane: Princeton University
N. Alidoust: Princeton University
S-Y. Xu: Princeton University
T. Kondo: ISSP, University of Tokyo
Y. Ishida: ISSP, University of Tokyo
D. J. Kim: University of California at Irvine
Chang Liu: Princeton University
I. Belopolski: Princeton University
Y. J. Jo: Kyungpook National University
T-R. Chang: National Tsing Hua University
H-T. Jeng: National Tsing Hua University
T. Durakiewicz: Condensed Matter and Magnet Science Group, Los Alamos National Laboratory
L. Balicas: National High Magnetic Field Laboratory, Florida State University
H. Lin: Northeastern University
A. Bansil: Northeastern University
S. Shin: ISSP, University of Tokyo
Z. Fisk: University of California at Irvine
M. Z. Hasan: Princeton University

Nature Communications, 2013, vol. 4, issue 1, 1-7

Abstract: Abstract The Kondo insulator SmB6 has long been known to exhibit low-temperature transport anomalies whose origin is of great interest. Here we uniquely access the surface electronic structure of the anomalous transport regime by combining state-of-the-art laser and synchrotron-based angle-resolved photoemission techniques. We observe clear in-gap states (up to ~4 meV), whose temperature dependence is contingent on the Kondo gap formation. In addition, our observed in-gap Fermi surface oddness tied with the Kramers’ point topology, their coexistence with the two-dimensional transport anomaly in the Kondo hybridization regime, as well as their robustness against thermal recycling, taken together, collectively provide strong evidence for protected surface metallicity with a Fermi surface whose topology is consistent with the theoretically predicted topological Fermi surface. Our observations of systematic surface electronic structure provide the fundamental electronic parameters for the anomalous Kondo ground state of correlated electron material SmB6.

Date: 2013
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/ncomms3991 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:4:y:2013:i:1:d:10.1038_ncomms3991

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/ncomms3991

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().