Observation of the J-sheet of the Fermi surface of YbRh2Si2

We report a previously unobserved quantum oscillation frequency in YbRh2Si2. This is the first quantum oscillation that can definitely be assigned to the larger of the two major sheets of the Fermi surface predicted by band structure calculations. Previously observed frequencies were interpreted in...

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Bibliographic Details
Published in:arXiv.org 2009-10
Main Authors: Sutton, A B, Rourke, P M C, Taufour, V, McCollam, A, Lapertot, G, Knebel, G, Flouquet, J, Julian, S R
Format: Article
Language:English
Subjects:
Fermi surfaces
Mathematical analysis
Online Access:Get full text
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Summary:We report a previously unobserved quantum oscillation frequency in YbRh2Si2. This is the first quantum oscillation that can definitely be assigned to the larger of the two major sheets of the Fermi surface predicted by band structure calculations. Previously observed frequencies were interpreted in terms of a large Fermi surface, which includes the Yb 4f-hole in the Fermi volume, that has been so strongly spin-split that it closely resembles the small Fermi surface, which does not include the Yb 4f -hole in the Fermi volume. The new frequency can also be incorporated into this picture, however there are some indications that the a need for more advanced energy band calculations.
ISSN:2331-8422
DOI:10.48550/arxiv.0910.1082