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The role of f -electrons in the Fermi surface of the heavy fermion superconductor beta-YbAlB4

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arxiv 0811.4417 v1 pith:MRTXNZRZ submitted 2008-11-26 cond-mat.str-el cond-mat.supr-con

The role of f -electrons in the Fermi surface of the heavy fermion superconductor beta-YbAlB4

E. C. T. O'Farrell , D. A. Tompsett , S. E. Sebastian , N. Harrison , C. Capan , L. Balicas , K. Kuga , T. Matsuo
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M. Tokunaga S. Nakatsuji G. Csanyi Z. Fisk M. L. Sutherland
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classification cond-mat.str-el cond-mat.supr-con
keywords fermisurfacebeta-ybalb4datafermionfieldsheavysuperconductor
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We present a detailed quantum oscillation study of the Fermi surface of the recently discovered Yb-based heavy fermion superconductor beta-YbAlB4 . We compare the data, obtained at fields from 10 to 45 Tesla, to band structure calculations performed using the local density approximation. Analysis of the data suggests that f-holes participate in the Fermi surface up to the highest magnetic fields studied. We comment on the significance of these findings for the unconventional superconducting properties of this material.

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