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Electronic structure of the α-(BEDT-TTF)2I3 surface by photoelectron spectroscopy

Author

Listed:
  • Émilie Tisserond

    (Laboratoire de Physique des Solides, CNRS-Université Paris-Sud UMR 8502)

  • Niloufar Nilforoushan

    (Laboratoire de Physique des Solides, CNRS-Université Paris-Sud UMR 8502)

  • Marco Caputo

    (Laboratoire de Physique des Solides, CNRS-Université Paris-Sud UMR 8502)

  • Pere Alemany

    (Departament de Ciència de Materials i Química Física and Institut de Química Teórica i Computacional (IQTCUB), Universitat de Barcelona)

  • Enric Canadell

    (Institut de Ciència de Materials de Barcelona (CSIC), Campus UAB)

  • Lama Khalil

    (Laboratoire de Physique des Solides, CNRS-Université Paris-Sud UMR 8502
    Synchrotron SOLEIL)

  • Ivana Vobornik

    (CNR-IOM Laboratorio TASC)

  • Jun Fujii

    (CNR-IOM Laboratorio TASC)

  • Pranab Kumar Das

    (CNR-IOM Laboratorio TASC
    International Centre for Theoretical Physics (ICTP))

  • Cécile Mézière

    (MOLTECH-Anjou, CNRS-Université d’Angers UMR 6200, Bâtiment K)

  • Patrick Batail

    (MOLTECH-Anjou, CNRS-Université d’Angers UMR 6200, Bâtiment K)

  • Jean-Paul Pouget

    (Laboratoire de Physique des Solides, CNRS-Université Paris-Sud UMR 8502)

  • Claude Pasquier

    (Laboratoire de Physique des Solides, CNRS-Université Paris-Sud UMR 8502)

  • Marino Marsi

    (Laboratoire de Physique des Solides, CNRS-Université Paris-Sud UMR 8502)

  • Miguel Monteverde

    (Laboratoire de Physique des Solides, CNRS-Université Paris-Sud UMR 8502)

Abstract

We report anomalies observed in photoelectron spectroscopy measurements performed on α-(BEDT-TTF)2I3 crystals. In particular, above its metal-insulator transition temperature (T = 135 K), we observe the lack of a sharp Fermi edge in contradiction with the metallic transport properties exhibited by this quasi-bidimensional organic material. We interpret these unusual results as a signature of a one-dimensional electronic behavior confirmed by DFT band structure calculations. Using photoelectron spectroscopy we probe a Luttinger liquid with a large correlation parameter (α > 1) that we interpret to be caused by the chain-like electronic structure of α-(BEDT-TTF)2I3 surface doped by iodine defects. These new surface effects are inaccessible by bulk sensitive measurements of electronic transport techniques. Graphical abstract

Suggested Citation

  • Émilie Tisserond & Niloufar Nilforoushan & Marco Caputo & Pere Alemany & Enric Canadell & Lama Khalil & Ivana Vobornik & Jun Fujii & Pranab Kumar Das & Cécile Mézière & Patrick Batail & Jean-Paul Poug, 2019. "Electronic structure of the α-(BEDT-TTF)2I3 surface by photoelectron spectroscopy," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 92(4), pages 1-6, April.
    • Handle: RePEc:spr:eurphb:v:92:y:2019:i:4:d:10.1140_epjb_e2019-90565-4
    DOI: 10.1140/epjb/e2019-90565-4
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    Keywords

    Solid State and Materials;

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