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Non-equilibrium d-wave pair density wave order parameter in superconducting cuprates
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 d-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 2Δ/ 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 d-wave superconducting and pair density wave gaps are possible.



中文翻译:

非平衡 d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 d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2Δ/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d波超导和成对密度波隙是可能的。

更新日期:2021-01-28
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