Effects of Fermi surface anisotropy on unconventional superconductivity in UPt{sub 3}
- Politechnika Wroclawska, Wroclaw (Poland). Inst. of Physics
- Univ. of Florida, Gainesville, FL (United States). Dept. of Physics
- ETH, Zeurich (Switzerland). Theoretische Physik
The authors discuss the weak-coupling BCS theory of the heavy fermion superconductor UPt{sub 3}, accounting for that system`s anisotropic, multisheeted Fermi surface by expanding the order parameter and pair potential in terms of appropriate basis functions of the irreducible representations of the D{sub 6h} crystal point group. Within a phenomenological model for the electronic structure of UPt{sub 3} chosen to capture the qualitative features of local density functional calculations and de Haas-van Alphen measurements, the authors show how Fermi surface anisotropy can favor pairing in certain symmetry classes, and influence the phase diagram of unconventional superconductors. They also calculate the Ginzburg-Landau coefficients, focusing on those coefficients relevant to current theories of the UPt{sub 3} phase diagram.
- OSTI ID:
- 642356
- Journal Information:
- Journal of Low Temperature Physics, Journal Name: Journal of Low Temperature Physics Journal Issue: 1-2 Vol. 111; ISSN JLTPAC; ISSN 0022-2291
- Country of Publication:
- United States
- Language:
- English
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