Normal-state magnetotransport in superconducting Tl{sub 2}Ba{sub 2}CuO{sub 6+{delta}} to millikelvin temperatures

Journal Article · Thu Feb 29 23:00:00 EST 1996 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.53.5848· OSTI ID:279103

Mackenzie, A P ^[1]; Julian, S R ^[2]; Sinclair, D C; Lin, C T ^[3]

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1. Interdisciplinary Research Centre in Superconductivity, University of Cambridge, Madingley Road, Cambridge CB3 OHE (United Kingdom)
2. Cavendish Laboratory, University of Cambridge, Madingley Road, Cambridge CB3OHE (United Kingdom)
3. Interdisciplinary Research Centre in Superconductivity, University of Cambridge, Madingley Road, Cambridge CB3OHE (United Kingdom)

We report a study of the normal-state Hall effect and magnetoresistance of single crystals of Tl{sub 2}Ba{sub 2}CuO{sub 6+{delta}}. Using samples with {ital T}{sub {ital c}}{lt}15 K, we can suppress the superconductivity down to low temperatures with magnetic fields of 16 T, and can thus study the normal state properties over three decades of temperature, extending into the {ital T}{r_arrow}0 limit where it is possible to make a reliable estimate of {ital k}{sub {ital F}}{approximately}0.7 A{sup {minus}1} from the Hall effect in the elastic-scattering regime. The temperature dependence of the Hall coefficient, {ital R}{sub {ital H}}, below 30 K rules out models in which {ital R}{sub {ital H}}({ital T}) is taken as a measure of a real temperature-dependent change in the carrier concentration. The two scattering rates (probed by the resistivity and the cotangent of the Hall angle) which characterize normal-state transport in the cuprates also appear in this overdoped material for {ital T}{ge}30 K. However, as {ital T}{r_arrow}0, we observe only a {ital single} scattering rate, whose temperature dependence is dominated by low power terms, in contrast to the {ital T}{sup 2} dependence predicted for a Fermi liquid. The relationship between these findings and anomalous behavior previously reported for the upper critical field is discussed. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 279103
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 9 Vol. 53; ISSN 0163-1829; ISSN PRBMDO
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BARIUM OXIDES
COPPER OXIDES
CRITICAL FIELD
FERMI GAS
GROUND STATES
HALL EFFECT
MAGNETORESISTANCE
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0-13 K
TEMPERATURE RANGE 13-65 K
THALLIUM OXIDES