Bulk Electronic Structure of Superconducting LaRu2P2 Single Crystals Measured by Soft-X-Ray Angle-Resolved Photoemission Spectroscopy

E. Razzoli, M. Kobayashi, V. N. Strocov, B. Delley, Z. Bukowski, J. Karpinski, N. C. Plumb, M. Radovic, J. Chang, T. Schmitt, L. Patthey, J. Mesot, and M. Shi
Phys. Rev. Lett. 108, 257005 – Published 19 June 2012
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Abstract

We present a soft x-ray angle-resolved photoemission spectroscopy (SX-ARPES) study of the stoichiometric pnictide superconductor LaRu2P2. The observed electronic structure is in good agreement with density functional theory (DFT) calculations. However, it is significantly different from its counterpart in high-temperature superconducting Fe pnictides. In particular, the bandwidth renormalization present in the Fe pnictides (23) is negligible in LaRu2P2 even though the mass enhancement is similar in both systems. Our results suggest that the superconductivity in LaRu2P2 has a different origin with respect to the iron pnictides. Finally, we demonstrate that the increased probing depth of SX-ARPES, compared to the widely used ultraviolet ARPES, is essential in determining the bulk electronic structure in the experiment.

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  • Received 26 January 2012

DOI:https://doi.org/10.1103/PhysRevLett.108.257005

© 2012 American Physical Society

Authors & Affiliations

E. Razzoli1, M. Kobayashi1,2, V. N. Strocov1, B. Delley3, Z. Bukowski4, J. Karpinski4, N. C. Plumb1, M. Radovic1,5, J. Chang1,5, T. Schmitt1, L. Patthey1, J. Mesot1,5, and M. Shi1

  • 1Swiss Light Source, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
  • 2Department of Applied Chemistry, School of Engineering, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
  • 3Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
  • 4Laboratory for Solid State Physics, ETH Zürich, CH-8093 Zürich, Switzerland
  • 5Institut de la Matiere Complexe, EPF Lausanne, CH-1015, Lausanne, Switzerland

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Issue

Vol. 108, Iss. 25 — 22 June 2012

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