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  Thermodynamic signatures of the field-induced states of graphite

LeBoeuf, D., Rischau, C. W., Seyfarth, G., Küchler, R., Berben, M., Wiedmann, S., et al. (2017). Thermodynamic signatures of the field-induced states of graphite. Nature Communications, 8(1): 1337, pp. 1-6. doi:10.1038/s41467-017-01394-7.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002E-2663-8 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002E-2667-F
Genre: Journal Article

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 Creators:
LeBoeuf, D.1, Author
Rischau, C. W.1, Author
Seyfarth, G.1, Author
Küchler, R.2, Author              
Berben, M.1, Author
Wiedmann, S.1, Author
Tabis, W.1, Author
Frachet, M.1, Author
Behnia, K.1, Author
Fauqué, B.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              

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 Abstract: When a magnetic field confines the carriers of a Fermi sea to their lowest Landau level, electron−electron interactions are expected to play a significant role in determining the electronic ground state. Graphite is known to host a sequence of magnetic field-induced states driven by such interactions. Three decades after their discovery, thermodynamic signatures of these instabilities are still elusive. Here we report the detection of these transitions with sound velocity measurements. The evolution of elastic constant anomalies with temperature and magnetic field allows to draw a detailed phase diagram which shows that the ground state evolves in a sequence of thermodynamic phase transitions. Our analysis indicates that the electron−electron interaction is not the sole driving force of these transitions and that lattice degrees of freedom play an important role.

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Language(s): eng - English
 Dates: 2017-11-072017-11-07
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
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Title: Nature Communications
  Abbreviation : Nat. Commun.
Source Genre: Journal
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Publ. Info: London : Nature Publishing Group
Pages: 1337 Volume / Issue: 8 (1) Sequence Number: 1337 Start / End Page: 1 - 6 Identifier: ISSN: 2041-1723
CoNE: https://pure.mpg.de/cone/journals/resource/2041-1723