Anomalous magnetoresistance and Hall current in the normal state of the cuprate superconductors

Ong, N. P. ; Jing, T. W. ; Chien, T. R. ; Wang, Z. Z. ; Ramakrishnan, T. V. ; Tarascon, J. M. ; Remschnig, K. (1991) Anomalous magnetoresistance and Hall current in the normal state of the cuprate superconductors Physica C: Superconductivity, 185-189 (1). pp. 34-39. ISSN 0921-4534

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/092145...

Related URL: http://dx.doi.org/10.1016/0921-4534(91)91946-2

Abstract

Experiments on the normal-state Hall effect in YBa2Cu3O7 and the normal-state magnetoresistance in Bi2Sr2CuO6(Bi 2201) are described. The strong temperature dependence of the Hall resistivity is shown to derive from a 'Hall scattering rate' 1/ΤH that varies as the square of temperature, in contrast to the transport scattering rate 1/Τtr. Scattering from zinc impurities increases both rates. We compare our results with a recent theory of Anderson. Low-temperature magnetoresistance (MR) has been used to extract the dephasing rate 1/Τφ in single-crystal Bi 2001. Between 0.4 and 20 K, 1/Τφ varies as T1/3. We discuss the anomalous enhancement of the dephasing rate and implications for the usual quasi-particle picture. The MR in a longitudinal field shows novel features that do not fi t conventional interaction theory.

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