Fermi Surface of KFe$_2$As$_2$ from Quantum Oscillations in Magnetostriction

D. A. Zocco; K. Grube; F. Eilers; T. Wolf; H. v. Löhneysen

doi:10.7566/JPSCP.3.015007

Fermi Surface of KFe$_2$As$_2$ from Quantum Oscillations in Magnetostriction

Superconductivity 2014-06-30 v1

Authors: D. A. Zocco , K. Grube , F. Eilers , T. Wolf , H. v. Löhneysen

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Abstract

We present a study of the Fermi surface of KFe $_2$ As $_2$ single crystals. Quantum oscillations were observed in magnetostriction measured down to 50 mK and in magnetic fields $H$ up to 14 T. For $H \parallel c$ , the calculated effective masses are in agreement with recent de Haas-van Alphen and ARPES experiments, showing enhanced values with respect to the ones obtained from previous band calculations. For $H \parallel a$ , we observed a small orbit at a cyclotron frequency of 64 T, characterized by an effective mass of $\sim 0.8 m_e$ , supporting the presence of a three-dimensional pocket at the Z-point.

Keywords

Fermi surface quantum oscillations magnetostriction KFe$_2$As$_2$ effective mass de Haas-van Alphen

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@article{arxiv.1401.4403,
  title  = {Fermi Surface of KFe$_2$As$_2$ from Quantum Oscillations in Magnetostriction},
  author = {D. A. Zocco and K. Grube and F. Eilers and T. Wolf and H. v. Löhneysen},
  journal= {arXiv preprint arXiv:1401.4403},
  year   = {2014}
}

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SCES Conference, Tokyo 2013

Fermi Surface of KFe$_2$As$_2$ from Quantum Oscillations in Magnetostriction

Abstract

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