Cited by 118Rare-earth and actinide compoundsPhysics of Superconductivity and MagnetismAdvanced Condensed Matter Physics

Closing the spin gap in the Kondo insulator Ce3Bi4Pt3 at high magnetic fields

Jaime, Marcelo, Movshovich, Roman, Stewart, Gregory R., Beyermann, Ward P., Berisso, Mariano Gomez, Hundley, Michael F., Canfield, Paul C., Sarrao, John L.·2000·Nature

Abstract

Kondo insulator materials--such as CeRhAs, CeRhSb, YbB12, Ce3Bi4Pt3 and SmB6--are 3d, 4f and 5f intermetallic compounds that have attracted considerable interest in recent years. At high temperatures, they behave like metals. But as temperature is reduced, an energy gap opens in the conduction band at the Fermi energy and the materials become insulating. This contrasts with other f-electron compounds, which are metallic at all temperatures. The formation of the gap in Kondo insulators has been proposed to be a consequence of hybridization between the conduction band and the f-electron levels, giving a 'spin' gap. If this is indeed the case, metallic behaviour should be recovered when the gap is closed by changing external parameters, such as magnetic field or pressure. Some experimental evidence suggests that the gap can be closed in SmB6 (refs 5, 8) and YbB12 (ref. 9). Here we present specific-heat measurements of Ce3Bi4Pt3 in d.c. and pulsed magnetic fields up to 60 tesla. Numerical results and the analysis of our data using the Coqblin-Schrieffer model demonstrate unambiguously a field-induced insulator-to-metal transition.

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Crossref · 10.1038/35012027

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  • Earlier work demonstrated c_V(T) measurements up to 60 T in a stabilized magnetic field plateau that was ∼100 ms long.

    “Earlier work at the National High Magnetic Fields Laboratory 16,17 demonstrated c V (T ) measurements up to 60 T, carried out in a stabilized magnetic field plateau that was ∼100 ms long.”

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Research works printed but not linked: 2

  1. Aeppli, G. & Fisk, Z. Kondo insulators. Comments Cond. Mat. Phys. 16, 155–165 (1992).
  2. Jaime, M. et al. in Physical Phenomena at High Magnetic Fields-III (eds Fisk, Z., Gor’kov, L. & Schrieffer, R.) 148–153 (World Scientific, Singapore, 1999).

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Authors
Jaime, M., Movshovich, R., Stewart, G. R., Beyermann, W. P., Berisso, M. G., Hundley, M. F., Canfield, P. C., & Sarrao, J. L.
Affiliations
  • Los Alamos National Laboratory (US)
  • University of Florida (US)
  • University of California, Riverside (US)
  • Iowa State University (US)
Corresponding author
Jaime, Marcelo
Venue
Nature
Published
2000-05
Volume
405
Issue
6783
Pages
160-163
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W1991150737
Cited by
118
References
25
Citations by year
2026: 1 · 2025: 3 · 2023: 6 · 2022: 9 · 2021: 4 · 2020: 3 · 2019: 8 · 2018: 8 · 2017: 8 · 2016: 2 · 2015: 7 · 2014: 7 · 2013: 6 · 2012: 3
FWCI
3.78
Type
journal article
Language
en
Open access
closed
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
Topics
  • Physical Sciences › Physics and Astronomy › Condensed Matter Physics › Rare-earth and actinide compounds
  • Physical Sciences › Physics and Astronomy › Condensed Matter Physics › Physics of Superconductivity and Magnetism
  • Physical Sciences › Physics and Astronomy › Condensed Matter Physics › Advanced Condensed Matter Physics
Keywords
Kondo insulator, Ce3Bi4Pt3, spin gap, specific heat, pulsed magnetic field, Coqblin-Schrieffer model, f-electron hybridization, rare-earth intermetallic compounds, high magnetic fields

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