Infrared spectroscopy study of the in-plane response of YBa 2 Cu 3 O 6.6 in magnetic fields up to 30 Tesla - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Physical Review Research Année : 2020

Infrared spectroscopy study of the in-plane response of YBa 2 Cu 3 O 6.6 in magnetic fields up to 30 Tesla

F. Lyzwa
  • Fonction : Auteur
B. Xu
  • Fonction : Auteur
P. Marsik
  • Fonction : Auteur
E. Sheveleva
  • Fonction : Auteur
I. Crassee
  • Fonction : Auteur
C. Bernhard
  • Fonction : Auteur

Résumé

With terahertz and infrared spectroscopy we studied the in-plane response of an underdoped, twinned YBa 2 Cu 3 O 6.6 single crystal with T c = 58(1) K in high magnetic fields up to B = 30 Tesla (T) applied along the c axis. Our goal was to investigate the field-induced suppression of superconductivity and to observe the signatures of the three-dimensional (3D) incommensurate copper charge density wave (Cu-CDW), which was previously shown to develop at such high magnetic fields. Our study confirms that a B field in excess of 20 T gives rise to a full suppression of the macroscopic response of the superconducting condensate. However, it reveals surprisingly weak signatures of the 3D Cu-CDW at high magnetic fields. At 30 T there is only a weak reduction of the spectral weight of the Drude-response (by about 3%), which is accompanied by an enhancement of the so-called mid-infrared (MIR) band as well as a narrow electronic mode around 240 cm −1 (and, possibly, another one around 90 cm −1), which is interpreted in terms of a pinned phase mode of the CDW. The pinned phase mode and the MIR band are strong features already without magnetic field, which suggests that prominent but short-ranged and slowly fluctuating (compared to the picosecond infrared timescale) CDW correlations exist all along, i.e., even at zero magnetic field.
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Dates et versions

hal-02996483 , version 1 (23-11-2020)

Identifiants

Citer

F. Lyzwa, B. Xu, P. Marsik, E. Sheveleva, I. Crassee, et al.. Infrared spectroscopy study of the in-plane response of YBa 2 Cu 3 O 6.6 in magnetic fields up to 30 Tesla. Physical Review Research, 2020, 2 (2), ⟨10.1103/PhysRevResearch.2.023218⟩. ⟨hal-02996483⟩
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