Physica C: Superconductivity and its Applications ( IF 1.7 ) Pub Date : 2021-01-12 , DOI: 10.1016/j.physc.2021.1353820 Mikhail Malakhov , Maxim Avdeev
We investigate the nonequilibrium pair density wave order parameter in a simple microscopic model with the ground state -wave spatially uniform superconductivity. After pushing the system out of equilibrium by a short-time induced order parameter, the system can exhibit robust free nondecaying oscillations of nonuniform superconducting order. In the weak nonequilibrium regime, the frequency of these oscillations is about and the amplitude can be explained qualitatively by features of equilibrium free energy. In case when the system was taken far from equilibrium, it transits to a non-linear regime where even metastable coexistence of -wave superconducting and pair density wave gaps are possible.
中文翻译:
非平衡 导电率中的双波对密度波阶参数
我们在具有基态的简单微观模型中研究非平衡对密度波阶参数 波在空间上均匀的超导性。在通过短时感应阶数参数使系统失衡后,系统会表现出不均匀的超导阶数的鲁棒的自由非衰减振荡。在弱非平衡状态下,这些振荡的频率约为振幅可以由平衡自由能的特征定性地解释。如果系统远离平衡状态,则会转变为非线性状态,在该状态下,亚稳态甚至存在波超导和成对密度波隙是可能的。