Dichotomy between the Hole and Electron Behavior in Multiband Superconductor FeSe Probed by Ultrahigh Magnetic Fields

M. D. Watson, T. Yamashita, S. Kasahara, W. Knafo, M. Nardone, J. Béard, F. Hardy, A. McCollam, A. Narayanan, S. F. Blake, T. Wolf, A. A. Haghighirad, C. Meingast, A. J. Schofield, H. V. Löhneysen, Y. Matsuda, A. I. Coldea, T. Shibauchi

研究成果査読

114 被引用数 (Scopus)

抄録

Magnetoresistivity ρxx and Hall resistivity ρxy in ultrahigh magnetic fields up to 88 T are measured down to 0.15 K to clarify the multiband electronic structure in high-quality single crystals of superconducting FeSe. At low temperatures and high fields we observe quantum oscillations in both resistivity and the Hall effect, confirming the multiband Fermi surface with small volumes. We propose a novel approach to identify from magnetotransport measurements the sign of the charge carriers corresponding to a particular cyclotron orbit in a compensated metal. The observed significant differences in the relative amplitudes of the quantum oscillations between the ρxx and ρxy components, together with the positive sign of the high-field ρxy, reveal that the largest pocket should correspond to the hole band. The low-field magnetotransport data in the normal state suggest that, in addition to one hole and one almost compensated electron band, the orthorhombic phase of FeSe exhibits an additional tiny electron pocket with a high mobility.

本文言語English
論文番号027006
ジャーナルPhysical Review Letters
115
2
DOI
出版ステータスPublished - 7月 10 2015
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学一般

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