Interplay between freezing and superconductivity in the optimally doped under hydrostatic pressure

B. Simovič; M. Nicklas; P. C. Hammel; M. Hücker; B. Büchner; J. D. Thompson

doi:10.1209/epl/i2004-10030-0

All issues

Volume 66 / No 5 (June 2004)

Europhys. Lett., 66 5 (2004) 722-728

Abstract

Issue		Europhys. Lett. Volume 66, Number 5, June 2004


Page(s)		722 - 728
Section		Condensed matter: electronic structure, electrical, magnetic, and optical properties
DOI		https://doi.org/10.1209/epl/i2004-10030-0
Published online		01 May 2004

Europhys. Lett., 66 (5), pp. 722-728 (2004)

Interplay between freezing and superconductivity in the optimally doped $\chem{La_{1.65}Eu_{0.2}Sr_{0.15}CuO_4}$ under hydrostatic pressure

B. Simovič¹, M. Nicklas², P. C. Hammel³, M. Hücker⁴, B. Büchner⁵ and J. D. Thompson⁶

¹ Laboratorium für Festkörperphysik HPF - ETH Hönggerberg CH-8093 Zürich, Switzerland
² Max Planck Institute for Chemical Physics of Solids Noethnitzer Str. 40, D-01187 Dresden, Germany
³ Department of Physics, The Ohio State University - Columbus, OH 43210, USA
⁴ Physics Department, Brookhaven National Laboratory - Upton, NY 11973, USA
⁵ RWTH Aachen - D-52056 Aachen, Germany
⁶ Condensed Matter and Thermal Physics, Los Alamos National Laboratory Los Alamos, NM 8754, USA

Received: 22 January 2004
Accepted: 6 April 2004

Abstract

We study the electronic properties of a $\chem{La_{1.65}Eu_{0.2}Sr_{0.15}CuO_4}$ single crystal under hydrostatic pressure up to 2.9 $\un{GPa}$ . Both the freezing of the $\chem{Cu}$ 3d moments and the structural transition from the orthorhombic (LTO) to the tetragonal (LTT) phase are observed via the relaxation of the nuclear magnetization of $\chem{{}^{139}La}$ nuclei. Resistivity and magnetic susceptibility measurements have been carried out under pressure on the same sample. The combination of all data reveals the connection between glassy dynamics, charge localization and the disappearance of superconductivity in the LTT phase.

PACS: 74.72.Dn – $\chem{La}$ -based cuprates / 74.25.Ha – Magnetic properties / 74.62.Fj – Pressure effects

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