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Detailed band structure of twinned and detwinned BaFe2As2 studied with angle-resolved photoemission spectroscopy

H. Pfau, C. R. Rotundu, J. C. Palmstrom, S. D. Chen, M. Hashimoto, D. Lu, A. F. Kemper, I. R. Fisher, and Z.-X. Shen
Phys. Rev. B 99, 035118 – Published 9 January 2019

Abstract

We study the band structure of twinned and detwinned BaFe2As2 using angle-resolved photoemission spectroscopy. The combination of measurements in the ordered and normal states along four high-symmetry momentum directions Γ/ZX/Y enables us to identify the complex reconstructed band structure in the ordered state in great detail. We clearly observe the nematic splitting of the dxz and dyz orbitals as well as folding due to magnetic order with a wave vector of (π,π,π). We are able to assign all observed bands. In particular we suggest an assignment of the electron bands different from previous reports. The high-quality spectra allow us to achieve a comprehensive understanding of the band structure of BaFe2As2.

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  • Received 8 October 2018
  • Revised 11 December 2018

DOI:https://doi.org/10.1103/PhysRevB.99.035118

©2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

H. Pfau1,2,*, C. R. Rotundu1, J. C. Palmstrom1,3, S. D. Chen3, M. Hashimoto4, D. Lu4, A. F. Kemper5, I. R. Fisher1,3, and Z.-X. Shen1,2,3

  • 1Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
  • 2Department of Physics, Stanford University, Stanford, California 94305, USA
  • 3Geballe Laboratory for Advanced Materials, Department of Applied Physics, Stanford University, Stanford, California 94305, USA
  • 4Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA
  • 5Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, USA

  • *hpfau@stanford.edu

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Issue

Vol. 99, Iss. 3 — 15 January 2019

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