1. Electronic structure of the α-(BEDT-TTF)2I3 surface by photoelectron spectroscopy
- Author
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Pranab Kumar Das, Emilie Tisserond, Miguel Monteverde, Ivana Vobornik, Cécile Mézière, Jun Fujii, N. Nilforoushan, Claude Pasquier, Patrick Batail, Marino Marsi, Lama Khalil, Pere Alemany, Jean-Paul Pouget, Enric Canadell, Marco Caputo, Laboratoire de Physique des Solides, Université Paris-Sud - Paris 11 (UP11), Laboratoire de Physique des Solides (LPS), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Universitat de Barcelona (UB), Institut de Ciència de Materials de Barcelona (ICMAB), Consejo Superior de Investigaciones Científicas [Spain] (CSIC), Istituto Officina dei Materiali-CNR (IOM), Laboratorio Nazionale TASC (CNR-INFM), Istituto Nazionale per la Fisica della Materia, Department of Condensed Matter Physics and Materials Science, MOLTECH-ANJOU (MOLTECH-ANJOU), Centre National de la Recherche Scientifique (CNRS)-Université d'Angers (UA), Ministerio de Economía y Competitividad (España), Generalitat de Catalunya, Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Department of Condensed Matter Physics and Materials Science [TIFR] (CMPMS), Tata Institute for Fundamental Research (TIFR), MOLTECH-Anjou, and Université d'Angers (UA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Electronic structure ,Materials science ,Solid-state physics ,Estructura electrònica ,01 natural sciences ,Molecular physics ,010305 fluids & plasmas ,Metal ,X-ray photoelectron spectroscopy ,Luttinger liquid ,Condensed Matter::Superconductivity ,0103 physical sciences ,010306 general physics ,Electronic band structure ,Materials ,ComputingMilieux_MISCELLANEOUS ,[PHYS]Physics [physics] ,Espectroscòpia de fotoelectrons ,Transition temperature ,Doping ,Condensed Matter Physics ,Electronic, Optical and Magnetic Materials ,Photoelectron spectroscopy ,Solid State ,visual_art ,visual_art.visual_art_medium ,Condensed Matter::Strongly Correlated Electrons - 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., We acknowledge A. Santander-Syro, M. Gabay and P. Auban- Senzier for fruitful discussions. Work in Spain was supported by the Spanish Ministerio de Econom a y Competitividad (Grants FIS2015-64886-C5-4-P and CTQ2015-64579-C3-3-P) and Generalitat de Catalunya (2017SGR1506, 2017SGR1289 and XRQTC). E.C. acknowledges support of the Spanish MINECO through the Severo Ochoa Centers of Excellence Program under Grant SEV-2015-0496. P.A. acknowledges support from the Maria de Maeztu Units of Excellence Program under Grant MDM-2017-0767.
- Published
- 2019
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