The influence of Th substitution on the crystal structure and the crystal field spectrum of the high- Tc superconductor HoBa2Cu 3O6.95

N. Golosova, A. Mirmelstein, V. Bobrovskii, E. Mitberg, A. Podlesnyak, K. Conder, A. Furrer

Research output: Contribution to journalArticlepeer-review

Abstract

To investigate the charge states in the CuO2 planes of the high-Tc superconductor HoBa2Cu3O 6.95 induced by the in-plane electron doping, we studied the crystal structure and the crystal field (CF) effects for Ho1-yTh yBa2Cu3O6.95 (y≈0.07, 0.13) by neutron powder diffraction and inelastic neutron scattering methods, respectively. The Th-induced variation of the CF transitions is found to be compatible with an idea of charge carrier compensation in the CuO2 planes due to electron doping. However, opposite to the case of the underdoped ErBa2Cu3Ox (6<x<7) and overdoped Ho 1-yCayBa2Cu3O6.95, we could not identify spatial domains with different doping level resulting from a partial substitution of Th4+ for Ho3+ sites.

Original languageEnglish
Pages (from-to)e335-e337
JournalPhysica B: Physics of Condensed Matter
Volume350
Issue number1-3 SUPPL. 1
DOIs
StatePublished - Jul 15 2004
Externally publishedYes

Funding

Financial support by INTAS (Grant 99-0256), the Russian Ministry of Industry, Science and Technologies (Contracts No. 40.020.1.1.1166, Project No. 6/03, and No. 40.012.1.1.1150), and Special Federal Program of Basic Research at Russian Academy of Sciences “Quantum macrophysics” is gratefully acknowledged. This work was partially performed at the SINQ, Paul Scherrer Institute, Villigen, Switzerland.

Keywords

  • Crystal field
  • High-T superconductor
  • Inelastic neutron scattering
  • Neutron powder diffraction

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