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Title: Low-temperature quantum relaxation of single two-dimensional vortices in an epitaxial Tl2Ba2Ca2Cu3Ox thin film
Author: García Santiago, Antoni
Zhang, Xixiang
Tejada Palacios, Javier
Manzel, M.
Bruchlos, H.
Keywords: Superconductors
Efecte túnel
Moviment de vòrtexs
Tunneling (Physics)
Issue Date: 1994
Publisher: The American Physical Society
Abstract: Time-logarithmic magnetic-relaxation measurements have been obtained in an epitaxial Tl 2 Ba 2 Ca 2 Cu 3 O x thin film for the zero-field cooled and remanent magnetization, with low and moderate applied magnetic fields. With low fields ( H a =50 Oe), the normalized magnetic relaxation rates, S≡‖d(M/ M i )/d lnt‖, are temperature independent below T≃3.4 K, and the transition from the thermal to the quantum regime appears to be quite sharp. With moderate fields ( H a =500 Oe), the transition becomes smooth and takes place at temperatures higher than with low fields, T≃7 K. This seems to indicate that the mechanism responsible for low-temperature relaxation would be nondissipative Hall tunneling of two-dimensional vortices, rather than dissipative vortex motion.
Note: Reproducció digital del document publicat en format paper, proporcionada per PROLA i
It is part of: Physical Review B, 1994, vol. 50, núm. 13, p. 9439-9444.
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ISSN: 0163-1829
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)

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