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Charge density waves in graphite : towards the magnetic ultraquantum limit
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Arnold, F., Isidori, A., Kampert, Erik, Yager, B., Eschrig, M. and Saunders, J. (2017) Charge density waves in graphite : towards the magnetic ultraquantum limit. Physical Review Letters, 119 (13). 136601. doi:10.1103/PhysRevLett.119.136601
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Official URL: http://dx.doi.org/10.1103/PhysRevLett.119.136601
Abstract
Graphite is a model system for the study of three-dimensional electrons and holes in the magnetic quantum limit, in which the charges are confined to the lowest Landau levels. We report magneto-transport measurements in pulsed magnetic fields up to 60 T, which resolve the collapse of two charge density wave states in two, electron and hole, Landau levels at 52.3 and 54.2 T, respectively. We report evidence for a commensurate charge density wave at 47.1 T in the electron Landau level, and discuss the likely nature of the density wave instabilities over the full field range. The theoretical modeling of our results predicts that the ultraquantum limit is entered above 73.5 T. This state is an insulator, and we discuss its correspondence to the “metallic” state reported earlier. We propose that this (interaction-induced) insulating phase supports surface states that carry no charge or spin within the planes, but does, however, support charge transport out of plane.
| Item Type: | Journal Article | ||||||
|---|---|---|---|---|---|---|---|
| Subjects: | Q Science > QC Physics | ||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||||
| Library of Congress Subject Headings (LCSH): | Graphite -- Magnetic properties , Semimetals | ||||||
| Journal or Publication Title: | Physical Review Letters | ||||||
| Publisher: | American Physical Society | ||||||
| ISSN: | 0031-9007 | ||||||
| Official Date: | 26 September 2017 | ||||||
| Dates: |
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| Volume: | 119 | ||||||
| Number: | 13 | ||||||
| Article Number: | 136601 | ||||||
| DOI: | 10.1103/PhysRevLett.119.136601 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||
| Funder: | Forschungszentrum Dresden-Rossendorf, European Magnetic Field Laboratory (EMFL), University of London. Royal Holloway. Hubbard Theory Consortium, Max-Planck-Gesellschaft zur Förderung der Wissenschaften [Max Planck Society for the Advancement of Science], Engineering and Physical Sciences Research Council (EPSRC) | ||||||
| Grant number: | EP/H048375/1, EP/J010618/1 (EPSRC) |
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