Phase Digrams in UPt_3 under Various Field Orientations
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概要
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By numerically analyzing the canonical Ginzburg-Landau (GL) free energy functional with two component order parameters under magnetic fields (H), it is shown that the observed phase diagrams in UPt_3 for both orientations of H⊥c and H//c in D_<6h> call be explained consistently. The mysterious field dependence of the unit cell angle of the vortex lattices observed by the neutron scattering experiment is quantitatively reproduced. The predicted diamagnetic term in the above GL turns out to be indispensable to understand these facts. This unambiguously demonstrates that the non-trivial vortex lattices are formed in each domain of temperature and field, reflecting the underlying unconventional pairing symmetry in UPt_3, and strengthening the validity of the canonical GL functional form which is independent of detailed pairing mechanism. Based on the present calculations possible orientational-dependent phase diagrams under pressures are predicted.
- 社団法人日本物理学会の論文
- 1995-01-15
著者
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FUJITA Tomoyuki
Department of Physics, Kyoto University
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Machida K
Okayama Univ. Okayama
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Ohmi T
Kyoto Univ. Kyoto
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Ohmi Tetsuo
Depart Of Physics Kyoto University
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Machida Kazushige
Department Of Physics Kyoto University
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Machida K
Department Of Physics Okayama University
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Fujita T
Kyoto Univ. Kyoto Jpn
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Fujita Toshimitsu
Department Of Physics Faculty Of Education Wakayama University
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Hirano Yoshihiko
Department of Physics, Okayama University
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Hirano Yoshihiko
Department Of Physics Okayama University
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OHMI Tetsuo
Dapartment of Physics, Kyoto University
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Fujita Toshimitsu
Department of Physics, Kyoto University
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