Direct numerical simulations for local superconductivity above upper critical field: theoretical confirmation of stable precursors

作者：Machida M^*; Itakura M

来源：Physica C-Superconductivity and Its Applications, 2003, 392: 331-335.

DOI：10.1016/S0921-4534(03)01232-2

• superconducting precursor
• time-dependent Ginzburg-Landau equation

Recently, superconducting precursors appearing above T, have attracted many interests. However, theoretical understanding for these states has not been established yet. Therefore, we perform direct numerical simulations for the time-dependent Ginzburg-Landau equation including superconducting fluctuations above the upper critical field. The simulation results reveal that local superconducting regions like isolated islands almost persist even above the upper critical field contrary to the ordinary concept in which emerging superconducting regions fluctuate temporarily and spatially. In this paper, we show simulation results for the vortex liquid state obtained by varying the temperature around the upper critical field under a fixed magnetic field and suggest the existence of a novel dynamics of the superconducting order above the upper critical field.

• 出版日期2003-10