Mixed-State Hall Conductivity in High- Tc Superconductors: Direct Evidence of Its Independence on Disorder

A. V. Samoilov; A. Legris; F. Rullier-Albenque; P. Lejay; S. Bouffard; Z. G. Ivanov; L.-G. Johansson

doi:10.1103/PhysRevLett.74.2351

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Mixed-State Hall Conductivity in High- Tc Superconductors: Direct Evidence of Its Independence on Disorder

A. V. Samoilov, A. Legris, F. Rullier-Albenque, P. Lejay, S. Bouffard, Z. G. Ivanov, L.-G. Johansson

DOI 10.1103/PhysRevLett.74.2351 · Physical Review Letters

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Abstract

We studied the Hall effect in a Tl2Ba2CaCu2O8 epitaxial film and in an YBa2Cu3O7 single crystal in the mixed state before and after irradiation with high energy Pb ions. Pinning enhancement due to irradiation-induced columnar defects leads to the decrease in magnitude of the longitudinal and Hall resistivities, but does not modify the behavior of the Hall conductivity. This result is valid independent of the sign of the Hall effect in the pinned region (positive for Tl2Ba2CaCu2O8 and negative for YBa2Cu3O7). The present work proves straightforwardly that the mixed-state Hall conductivity does not depend on the pinning strength, in agreement with theory. This result is a dual analog of the behavior of 2D electronic systems where the Hall resistivity remains unaffected by disorder.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Tl2Ba2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown