Volume 56, Number 1, October 2001
|Page(s)||105 - 111|
|Section||Condensed matter: electronic structure, electrical, magnetic, and opticalproperties|
|Published online||01 December 2003|
Peculiar charge localization and cluster-spin-glass-like behaviour in underdoped
Superconductivity Research Laboratory, ISTEC
1-10-13 Shinonome, Koto-ku, Tokyo 135-0062, Japan
Corresponding author: firstname.lastname@example.org
Accepted: 16 July 2001
We report on the out-of- and in-plane resistivity results in underdoped superconducting (SC) crystals that show a pronounced upturn in resistivity followed by a SC or metallic state at low temperature for . The resistivity and the magnetization exhibit an unusual upturn and irreversibility, respectively, at the same temperature, suggesting a peculiar charge localization and a cluster-spin-glass-like behaviour, probably due to magnetic ordering with low-energy magnetic fluctuations. The thermomagnetic and magnetic hysteresis, and relaxation indicate the presence of an actual frozen cluster-spin-glass-like state at low temperature, where spin fluctuations slow down significantly. Our results indicate that the metal-insulator-like upturn in resistivity and thermomagnetic history effects have a common origin.
PACS: 74.25.-q – Superconductivity: General properties; correlations between physical properties in normal and superconducting states / 74.25.Fy – Transport properties (electric and thermal conductivity, thermoelectric effects, etc) / 74.25.Ha – Magnetic properties
© EDP Sciences, 2001
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.