Effect of structural relaxation on the metal–insulator transition in heavily underdoped YBa 2 Cu 3 O 7−δ single crystals

R.V. Vovk, O.V. Dobrovolskiy, Z.F. Nazyrov, K.A. Kotvitskaya, Alexander Chroneos

Research output: Contribution to journalArticle

Abstract

We report the results of a study of the effect of structural relaxation on the basal-plane conductivity of heavily underdoped high- Tc YBa 2 Cu 3 O 7−δ single crystals. An increase of the oxygen deficiency in YBa 2 Cu 3 O 7−δ has been found to strengthen localization effects and to lead to the realization of a transition of the metal–insulator type, which always precedes the superconducting transition. In addition, a 5-day room-temperature annealing of the samples has been revealed to result in a notable shift of the metal–insulator transition point toward higher temperatures.
Original languageEnglish
Pages (from-to)277-283
JournalJournal of Low Temperature Physics
Volume180
Issue number3-4
DOIs
Publication statusPublished - 2015

Bibliographical note

The full text of this item is not available from the repository.
The final publication is available at Springer via http://dx.doi.org/10.1007/s10909-015-1304-z.

Keywords

  • Annealing
  • Metal–insulator transition
  • Superconducting cuprates

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