Role of $f$ Electrons in the Fermi Surface of the Heavy Fermion Superconductor $\ensuremath{\beta}\mathrm{\text{\ensuremath{-}}}{\mathrm{YbAlB}}_{4}$

Role of $f$ Electrons in the Fermi Surface of the Heavy Fermion Superconductor $β − {YbAlB}_{4}$

E. C. T. O’Farrell, D. A. Tompsett, S. E. Sebastian, N. Harrison, C. Capan, L. Balicas, K. Kuga, A. Matsuo, K. Kindo, M. Tokunaga, S. Nakatsuji, G. Csányi, Z. Fisk, and M. L. Sutherland

Phys. Rev. Lett. 102, 216402 – Published 27 May 2009

Abstract

We present a detailed quantum oscillation study of the Fermi surface of the recently discovered Yb-based heavy fermion superconductor $β − {YbAlB}_{4}$ . We compare the data, obtained at fields from 10 to 45 T, 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.

Received 28 November 2008

DOI:https://doi.org/10.1103/PhysRevLett.102.216402

Authors & Affiliations

E. C. T. O’Farrell¹, D. A. Tompsett¹, S. E. Sebastian¹, N. Harrison², C. Capan³, L. Balicas⁴, K. Kuga⁵, A. Matsuo⁵, K. Kindo⁵, M. Tokunaga⁵, S. Nakatsuji⁵, G. Csányi⁶, Z. Fisk³, and M. L. Sutherland¹

¹Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, United Kingdom
²NHMFL, MS-E536, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
³Department of Physics and Astronomy, University of California, Irvine, California 92697-4575, USA
⁴National High Magnetic Field Laboratory, Tallahassee, Florida 32310, USA
⁵Institute for Solid State Physics, University of Tokyo, Kashiwa, Japan 277-8581
⁶Department of Engineering, Cambridge University, Trumpington Street, Cambridge CB2 1PZ, United Kingdom

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Vol. 102, Iss. 21 — 29 May 2009

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Physical Review Letters

Role of f Electrons in the Fermi Surface of the Heavy Fermion Superconductor β−YbAlB4

E. C. T. O’Farrell, D. A. Tompsett, S. E. Sebastian, N. Harrison, C. Capan, L. Balicas, K. Kuga, A. Matsuo, K. Kindo, M. Tokunaga, S. Nakatsuji, G. Csányi, Z. Fisk, and M. L. Sutherland

Phys. Rev. Lett. 102, 216402 – Published 27 May 2009

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Role of $f$ Electrons in the Fermi Surface of the Heavy Fermion Superconductor $β − {YbAlB}_{4}$