On the Puzzle of Odd-Frequency Superconductivity
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概要
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Since the first theoretical proposal by Berezinskii, an odd-frequency superconductivity has encountered the fundamental problems on its thermodynamic stability and rigidity of a homogenous state accompanied by unphysical Meissner effect. Recently, Solenov et al. [Phys. Rev. B 79 (2009) 132502] have asserted that the path-integral formulation gets rid of the difficulties leading to a stable homogenous phase with an ordinary Meissner effect. Here, we show that it is crucial to choose the appropriate saddle-point solution that minimizes the effective free energy, which was assumed implicitly in the work by Solenov and co-workers. We exhibit the path-integral framework for the odd-frequency superconductivity with general type of pairings, including an argument on the retarded functions via the analytic continuation to the real axis.
- 2011-05-15
著者
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Miyake Kazumasa
Division Of Endocrine Surgery Kawasaki Medical School.
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Kusunose Hiroaki
Department Of Material Physics Faculty Of Engineering Science Osaka University
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Fuseya Yuki
Division Of Material Physics Department Of Physical Science Graduate School Of Engineering Science O
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Kusunose Hiroaki
Department of Physics, Ehime University, Matsuyama 790-8577, Japan
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Fuseya Yuki
Division of Materials Physics, Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
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