Temperature dependence of the Hall angle in single-crystal YBa2(Cu1-xCox)3O7-δ

Carrington, A.; Mackenzie, A. P.; Lin, C.T.; Cooper, J.R.

doi:10.1103/PhysRevLett.69.2855

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Temperature dependence of the Hall angle in single-crystal YBa₂(Cu_1-xCo_x)₃O_7-δ

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Citation

Carrington, A., Mackenzie, A. P., Lin, C., & Cooper, J. (1992). Temperature dependence of the Hall angle in single-crystal YBa₂(Cu_1-xCo_x)₃O_7-δ. Physical Review Letters, 69(19), 2855-2858. doi:10.1103/PhysRevLett.69.2855.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0018-E7B1-2

Abstract

We report the measurements of the Hall coefficient (R(H)) and a-b-plane resistivity rho(T) of cobalt-doped YBa2(Cu1-xCox)3O7-delta single crystals (0 less-than-or-equal-to x less-than-or-equal-to 0.096) from 20 to 400 K. Co doping gives rise to an unusual downward curvature in rho(T) while the inverse Hall coefficient [1/R(H)(T)] also becomes nonlinear. Despite this, Anderson's formula for the Hall angle theta(H), namely, cottheta(H) = AT2 + B continues to remain valid. In contrast to Zn, doping with Co decreases A while B remains constant. A simple model involving a square Fermi surface with rounded corners that could also account for the AT2 + B law is proposed.