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Title: Magnetic field-tuned Fermi liquid in a Kondo insulator

Abstract

Kondo insulators are expected to transform into metals under a sufficiently strong magnetic field. The closure of the insulating gap stems from the coupling of a magnetic field to the electron spin, yet the required strength of the magnetic field–typically of order 100 T–means that very little is known about this insulator-metal transition. Here we show that Ce 3Bi 4Pd 3, owing to its fortuitously small gap, provides an ideal Kondo insulator for this investigation. A metallic Fermi liquid state is established above a critical magnetic field of only B c ≈ 11 T. A peak in the strength of electronic correlations near B c, which is evident in transport and susceptibility measurements, suggests that Ce 3Bi 4Pd 3 may exhibit quantum criticality analogous to that reported in Kondo insulators under pressure. Metamagnetism and the breakdown of the Kondo coupling are also discussed.

Authors:
ORCiD logo [1]; ORCiD logo [1];  [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; USDOE Laboratory Directed Research and Development (LDRD) Program; National Science Foundation (NSF)
OSTI Identifier:
1603991
Report Number(s):
[LA-UR-19-25216]
[Journal ID: ISSN 2041-1723]
Grant/Contract Number:  
[89233218CNA000001; DMR-1157490; DMR-1644779; 20180025DR]
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
[ Journal Volume: 10; Journal Issue: 1]; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
High Magnetic Field Science; Kondo insulator; Fermi liquid; High magnetic field

Citation Formats

Kushwaha, Satya Kumar, Chan, Mun Keat, Park, Joonbum, Thomas, Sean Michael, Bauer, Eric Dietzgen, Thompson, Joe David, Ronning, Filip, Rosa, Priscila Ferrari Silveira, and Harrison, Neil. Magnetic field-tuned Fermi liquid in a Kondo insulator. United States: N. p., 2019. Web. doi:10.1038/s41467-019-13421-w.
Kushwaha, Satya Kumar, Chan, Mun Keat, Park, Joonbum, Thomas, Sean Michael, Bauer, Eric Dietzgen, Thompson, Joe David, Ronning, Filip, Rosa, Priscila Ferrari Silveira, & Harrison, Neil. Magnetic field-tuned Fermi liquid in a Kondo insulator. United States. doi:10.1038/s41467-019-13421-w.
Kushwaha, Satya Kumar, Chan, Mun Keat, Park, Joonbum, Thomas, Sean Michael, Bauer, Eric Dietzgen, Thompson, Joe David, Ronning, Filip, Rosa, Priscila Ferrari Silveira, and Harrison, Neil. Mon . "Magnetic field-tuned Fermi liquid in a Kondo insulator". United States. doi:10.1038/s41467-019-13421-w. https://www.osti.gov/servlets/purl/1603991.
@article{osti_1603991,
title = {Magnetic field-tuned Fermi liquid in a Kondo insulator},
author = {Kushwaha, Satya Kumar and Chan, Mun Keat and Park, Joonbum and Thomas, Sean Michael and Bauer, Eric Dietzgen and Thompson, Joe David and Ronning, Filip and Rosa, Priscila Ferrari Silveira and Harrison, Neil},
abstractNote = {Kondo insulators are expected to transform into metals under a sufficiently strong magnetic field. The closure of the insulating gap stems from the coupling of a magnetic field to the electron spin, yet the required strength of the magnetic field–typically of order 100 T–means that very little is known about this insulator-metal transition. Here we show that Ce3Bi4Pd3, owing to its fortuitously small gap, provides an ideal Kondo insulator for this investigation. A metallic Fermi liquid state is established above a critical magnetic field of only Bc ≈ 11 T. A peak in the strength of electronic correlations near Bc, which is evident in transport and susceptibility measurements, suggests that Ce3Bi4Pd3 may exhibit quantum criticality analogous to that reported in Kondo insulators under pressure. Metamagnetism and the breakdown of the Kondo coupling are also discussed.},
doi = {10.1038/s41467-019-13421-w},
journal = {Nature Communications},
number = [1],
volume = [10],
place = {United States},
year = {2019},
month = {12}
}

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