Origin of Spontaneous Broken Mirror Symmetry of Vortex Lattices in Nb
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概要
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Combining the microscopic Eilenberger theory with the first-principles band calculation, we investigate the stable flux line lattice (FLL) for a field applied to the fourfold axis, i.e., H\parallel [001] in cubic Nb. The observed FLL transformation along H_{\text{c2}} is almost perfectly explained without using adjustable parameter, including the tilted square, scalene triangle with broken mirror symmetry, and isosceles triangle lattices upon increasing T. We construct a minimum Fermi surface model to understand such morphologies, particularly the stability of the scalene triangle lattice attributed to the lack of mirror symmetry about the Fermi velocity maximum direction in k-space.
- 2011-11-15
著者
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Machida Kazushige
Department Of Physics Kyoto University
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Ishikawa Masaki
Department Of Energy Sciences Tokyo Institute Of Technology
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Ichioka Masanori
Department Of Physics Kyoto University
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Adachi Hiroki
Department Of Materials Science And Chemistry University Of Hyogo
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Adachi Hiroki
Department of Physics, Okayama University, Okayama 700-8530, Japan
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Machida Kazushige
Department of Physics, Okayama University, Okayama 700-8530, Japan
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Hirano Tomoya
Department of Physics, Okayama University, Okayama 700-8530, Japan
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Ishikawa Masaki
Department of Physics, Okayama University, Okayama 700-8530, Japan
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ISHIKAWA Masaki
Department of Diagnostic Radiology, Division of Medical Intelligence and Informatics, Hiroshima University
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