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Pressure induced heavy electron states in TmTe

Authors
Journal
Infrared Physics & Technology
1350-4495
Publisher
Elsevier
Publication Date
Volume
51
Issue
5
Identifiers
DOI: 10.1016/j.infrared.2007.12.038
Keywords
  • Infrared Spectromicroscopic Reflection Measurement
  • Tmte
  • Heavy Fermion State

Abstract

Abstract We performed a spectromicroscopic measurement on TmTe single crystal with fractured surface in THz to visible regions (25 meV to 2.5 eV) at 300 K and at pressures up to 6 GPa by using a diamond anvil cell (DAC) at the spectromicroscopy station (BL43IR) of SPring-8 in the THz region and also at Kobe University in the IR–visible regions. At pressures above around 1 GPa, a prominent Drude-like structure due to the appearance of the conduction electrons was resolved in the reflection spectra. From the analysis of the spectra by a simple Drude model, we found that the pressure-induced metallic state behaves as a heavy electron system.

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