Observation of the J-sheet of the Fermi surface of YbRh2Si2
A. B. Sutton (1), P. M. C. Rourke (1, 2), V. Taufour (3), A., McCollam (1, 4), G. Lapertot (3), G. Knebel (3), J. Flouquet (3), S. R., Julian (1) ((1) University of Toronto, Toronto, Canada, (2) University of, Bristol, Bristol, UK, (3) CEA Grenoble, Grenoble, France
TL;DR
This paper reports the first observation of a quantum oscillation frequency in YbRh2Si2 that confirms the existence of the larger Fermi surface sheet predicted by band structure calculations, providing new insights into its electronic structure.
Contribution
First experimental detection of a quantum oscillation frequency associated with the larger Fermi surface sheet in YbRh2Si2, supporting theoretical predictions.
Findings
Observation of a new quantum oscillation frequency.
Confirmation of the larger Fermi surface sheet in YbRh2Si2.
Implication for more advanced band structure calculations.
Abstract
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.
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