2011年5月
On the Puzzle of Odd-Frequency Superconductivity
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
- ,
- ,
- 巻
- 80
- 号
- 5
- 記述言語
- 英語
- 掲載種別
- DOI
- 10.1143/JPSJ.80.054702
- 出版者・発行元
- PHYSICAL SOC JAPAN
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.
- リンク情報
- ID情報
-
- DOI : 10.1143/JPSJ.80.054702
- ISSN : 0031-9015
- Web of Science ID : WOS:000290435500017