Dresden 2014 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 79: Correlated Electrons - Poster Session
TT 79.60: Poster
Mittwoch, 2. April 2014, 15:00–19:00, P2
Investigations on the Fermi surface of SrCo2P2 — •K. Götze1,2, J. Klotz1,2, C. Geibel3, C. Bergmann3, H. Rosner3, and J. Wosnitza1,2 — 1Hochfeld-Magnetlabor (HLD), Helmholtz-Zentrum Dresden-Rossendorf — 2Institut für Festkörperphysik, TU Dresden — 3Max-Planck-Institut CPfS, Dresden
SrCo2P2 is a non-superconducting member of the 122 pnictides with ThCr2Si2 tetragonal structure type. Although band-structure calculations predict ferromagnetic ordering in this compound, it only exhibits Stoner-enhanced paramagnetism [1]. However, peculiarities of the electronic structure depend on details of the crystal structure (like the P z coordinate) which are not known precisely enough. Therefore, an experimental determination of the Fermi surface is desirable to explain this discrepancy. Probing the de Haas-van Alphen effect by use of a capacitive torque magnetometer setup, we measured the full angular dependence of quantum oscillations and effective masses of SrCo2P2. Our experiments were carried out in a top-loading dilution refrigerator and a 3He system at temperatures ranging from 25 mK to 4.2 K, and in magnetic fields up to 35 T. In combiniation with density-functional band-structure calculations, our results provide detailed information about the Fermi surface of SrCo2P2.
[1] S. Jia et al., Phys. Rev B. 80, 165107 (2009).