Angle-resolved photoemission spectroscopy study of HgBa2CuO4+δ

I. M. Vishik, N. Barišić, M. K. Chan, Y. Li, D. D. Xia, G. Yu, X. Zhao, W. S. Lee, W. Meevasana, T. P. Devereaux, M. Greven, and Z.-X. Shen
Phys. Rev. B 89, 195141 – Published 29 May 2014

Abstract

HgBa2CuO4+δ (Hg1201) has been shown to be a model cuprate for scattering, optical, and transport experiments, but angle-resolved photoemission spectroscopy (ARPES) data are still lacking owing to the absence of a charge-neutral cleavage plane. We report on progress in achieving the experimental conditions for which quasiparticles can be observed in the near-nodal region of the Fermi surface. The d-wave superconducting gap in near-optimally-doped Hg1201 is found to have a maximum of 39 meV. At low temperature, a kink is detected in the nodal dispersion at approximately 51 meV below the Fermi level, an energy that is different from other cuprates with comparable Tc. The superconducting gap, Fermi surface, and nodal band renormalization measured here provide a crucial momentum-space complement to other experimental probes.

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  • Received 7 February 2014
  • Revised 7 April 2014

DOI:https://doi.org/10.1103/PhysRevB.89.195141

©2014 American Physical Society

Authors & Affiliations

I. M. Vishik1, N. Barišić2,3, M. K. Chan2, Y. Li4,5, D. D. Xia2,6,*, G. Yu2, X. Zhao2,6, W. S. Lee7,8, W. Meevasana9, T. P. Devereaux7,8, M. Greven2, and Z.-X. Shen7,8

  • 1Massachusetts Institute of Technology, Department of Physics, Cambridge, Massachusetts, 02139, USA
  • 2University of Minnesota, School of Physics and Astronomy, Minneapolis, Minnesota 55455, USA
  • 3Institute of Solid State Physics, Vienna University of Technology, Vienna, 1040, Austria
  • 4Peking University, International Center for Quantum Materials, School of Physics, Beijing, 100871, China
  • 5Collaborative Innovation Center of Quantum Matter, Beijing, 100871, China
  • 6State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China
  • 7Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
  • 8Geballe Laboratory for Advanced Materials, Departments of Physics and Applied Physics, Stanford University, Stanford, California 94305, USA
  • 9School of Physics, Suranaree University of Technology, Muang, Nakhon Ratchasima, 30000, Thailand

  • *Present address: School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, Shenyang, 110016, China.

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Vol. 89, Iss. 19 — 15 May 2014

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