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Field-dependent specific heat and multiple superconducting phases in UPt_3

Ellman, B. and Yang, J. and Rosenbaum, T. F. and Bucher, E. (1990) Field-dependent specific heat and multiple superconducting phases in UPt_3. Physical Review Letters, 64 (13). pp. 1569-1572. ISSN 0031-9007. doi:10.1103/PhysRevLett.64.1569.

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We have measured the specific heat, C, of single-crystal UPt_3 in the superconducting regime as a function of temperature, T, and magnetic field, H, parallel to the c axis. We find that C(T) at fixed H<H_(c2) shows no evidence for different superconducting states. In contrast, our field-sweep data, C(H) at fixed T, have sharp changes in slope at H≊H_(c2)/2. The phase diagram deduced from these features agrees with neutron-scattering and torsional-oscillator results on the same samples. These thermodynamic measurements as a function of magnetic field constrain theories of exotic superconductivity in UPt_3.

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Alternate Title:Field-dependent specific heat and multiple superconducting phases in UPt3
Additional Information:© 1990 The American Physical Society. Received 4 December 1989. We are indebted to G. Aeppli both for generously supplying the sample and for valuable advice. We thank D. Bishop, E. Blount, R. Joynt, and C. Varma for helpful discussions. The specific-heat measurements, made at The University of Chicago, were supported by NSF Grant No. DMR 88-16817. J. Yang acknowledges support from NSF Grant No. DMR 83-51992. B. Ellman submits this paper in partial fulfillment of the requirements for the Ph. D. degree in the Physics Department of The University of Chicago.
Funding AgencyGrant Number
NSFDMR 88-16817
NSFDMR 83-51992
Issue or Number:13
Classification Code:PACS numbers: 74.70.Tx, 74.30.Ek
Record Number:CaltechAUTHORS:20140707-163039090
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:47026
Deposited By: George Porter
Deposited On:10 Jul 2014 03:07
Last Modified:10 Nov 2021 17:33

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