Published April 9, 2021 | Version v1
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SmB6 electron-phonon coupling constant from time- and angle-resolved photoelectron spectroscopy

  • 1. Università degli Studi di Trieste, Via A. Valerio 2, I-34127 Trieste, Italy
  • 2. Institute of Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
  • 3. Elettra - Sincrotrone Trieste S.C.p.A., Strada Statale 14, km 163.5, I-34149 Trieste, Italy
  • 4. Van der Waals-Zeeman Institute, Institute of Physics (IoP), University of Amsterdam, Science Park 904, NL-1098 XH Amsterdam, The Netherlands
  • 5. CSNSM, Université Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, F-91405 Orsay, France
  • 6. CNR-IOM, Strada Statale 14, km 163.5, I-34149 Trieste, Italy
  • 7. International Faculty, University of Cologne, D-50937 Cologne, Germany

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Description

This record contains the experimental results of the first ultrafast spectroscopic investigation of the electronic properties of SmB6, proposed to realize a Kondo topological insulator. We employ a multi-temperature model to extract the electron-phonon coupling constant in the range 0.13-0.04, within the assumption of a strong coupling to the optical phonon modes in the range 10-19 meV.

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References

Journal reference
A. Sterzi et al., Physical Review B 94, 081111 (R) (2017), doi: 10.1103/PhysRevB.94.081111