Origin of the nuclear specific heats in high-Tc superconductors

Caspary, R.; Winkelmann, M.; Steglich, F.

doi:10.1016/0921-4534(89)91112-X

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Origin of the nuclear specific heats in high-T_c superconductors

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Caspary, R., Winkelmann, M., & Steglich, F. (1989). Origin of the nuclear specific heats in high-T_c superconductors. Physica C, 162, 474-475. doi:10.1016/0921-4534(89)91112-X.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0019-D51B-3

Abstract

Published B = 0 data of the nuclear specific heats of Bi2Sr2CaCu2O8 (Tc = 85K) and La1.85Sr0.15CuO4 originate from quadrupolar interactions only, implying that fluctuation rates of any intrinsic Cu moments have to exceed 107s−1. Results up to B = 8 T for Bi2Sr2CaCu2O8 and YBa2Cu3O6.87 can be explained by a superposition of quadrupolar and hyperfine splittings.