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Quasi-two-dimensional Fermi surface topography of the delafossite PdRhO2

F. Arnold, M. Naumann, S. Khim, H. Rosner, V. Sunko, F. Mazzola, P. D. C. King, A. P. Mackenzie, and E. Hassinger
Phys. Rev. B 96, 075163 – Published 31 August 2017
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    Abstract

    We report on a combined study of the de Haas-van Alphen effect and angle-resolved photoemission spectroscopy on single crystals of the metallic delafossite PdRhO2 rounded off by ab initio band structure calculations. A high-sensitivity torque magnetometry setup with superconducting quantum interference device readout and synchrotron-based photoemission with a light spot size of 50μm enabled high-resolution data to be obtained from samples as small as 150×100×20(μm)3. The Fermi surface shape is nearly cylindrical with a rounded hexagonal cross section enclosing a Luttinger volume of 1.00(1) electrons per formula unit.

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    • Received 27 June 2017
    • Revised 7 August 2017

    DOI:https://doi.org/10.1103/PhysRevB.96.075163

    ©2017 American Physical Society

    Physics Subject Headings (PhySH)

    1. Research Areas
    Electronic structureFermi surfaceMetals
    1. Physical Systems
    2-dimensional systems
    1. Techniques
    Density functional theoryde Haas-van Alphen effect
    Condensed Matter, Materials & Applied Physics

    Authors & Affiliations

    F. Arnold1, M. Naumann1,2, S. Khim1, H. Rosner1, V. Sunko1,3, F. Mazzola3, P. D. C. King3, A. P. Mackenzie1,3,*, and E. Hassinger1,2,†

    • 1Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany
    • 2Physik-Department, Technische Universität München, 85748 Garching, Germany
    • 3Scottish Universities Physics Alliance, School of Physics and Astronomy, University of St. Andrews, St. Andrews, Fife KY16 9SS, United Kingdom

    • *Corresponding author: mackenzie@cpfs.mpg.de
    • †Corresponding author: elena.hassinger@cpfs.mpg.de

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    Vol. 96, Iss. 7 — 15 August 2017

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    • Figure 1
      Figure 1

      Planar Fermi surface topography of PdRhO2 as determined by angle-resolved photo-emission spectroscopy (ARPES), density functional theory (DFT) calculations, and in-plane Fermi surface harmonics quoted later in Table 1. DFT and surface harmonics data have been rescaled by −6% to fit the ARPES results.

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    • Figure 2
      Figure 2

      Magnetic torque de Haas-van Alphen signal of PdRhO2 at T≈100mK. (a) shows the magnetic field dependence of the de Haas-van Alphen oscillations for a selection of magnetic field angles within the ZΓL plane. The data were background subtracted by a second-order polynomial. A zoom of the high field oscillations is shown in (b). (c) displays the Fourier transforms corresponding to the oscillations shown in (a). Data have been multiplied and offset for clarity. The dashed line shows the 1/cos(θ)-angular dependence of the mean quantum oscillation frequency F¯ for a 2D Fermi surface.

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    • Figure 3
      Figure 3

      The graph shows the angular dependence of the symmetrized quantum oscillation frequencies for magnetic field angles within the crystallographic ZΓK plane (a) and ZΓL plane (b). Dark blue and violet symbols are data points taken on the same PdRhO2 single crystal, whereas light blue symbols originate from a second sample from the same growth batch. Black dashed lines correspond to the cylindrical harmonic expansion of best fit. The associated harmonic parameters can be found in Table 1.

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