Microscopic Eilenberger theory of Fulde-Ferrell-Larkin-Ovchinnikov states in the presence of vortices
Microscopic Eilenberger theory of Fulde-Ferrell-Larkin-Ovchinnikov states in the presence of vortices
复制标题
存在涡旋时 Fulde-Ferrell-Larkin-Ovchinnikov 状态的微观 Eilenberger 理论
DOI：
10.1103/physrevb.101.214516
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
et al
中科院分区：
文献类型：
--
作者：
Kenta M. Suzuki;et al
利用微观准经典Eilenberger方程，对Fulde-Ferrell-Larkin-Ovchinnikov态进行了理论研究.在三维球费米面模型和波对中，泡利顺磁效应和涡旋引起的轨道破坏效应被同等对待。详细研究了Larkin-Ovchinnikov（LO）态的场演化，包括相图、序参量的空间结构、顺磁矩和内场。场依赖性的各种热力学量的顺磁矩，熵，和零能量密度的状态计算。这些数量显示进入LO状态后开始快速增长。我们还评估了LO调制的波长，小角度中子散射的通量线晶格形状因子，以及NMR光谱，以便于识别LO状态。对比研究了强和中等泡利顺磁效应的两种情况。LO阶段的可能性，，和有机超导体的严格审查和关键的实验，以确定它的建议。
We theoretically investigate the Fulde-Ferrell-Larkin-Ovchinnikov state by using the microscopic quasiclassical Eilenberger equation. The Pauli paramagnetic effects and the orbital depairing effects due to vortices are treated on an equal footing for three-dimensional spherical Fermi surface model and-wave pairing. The field evolution of the Larkin-Ovchinnikov (LO) state is studied in detail, such as thephase diagram, spatial structures of the order parameter, the paramagnetic moment, and the internal field. Field dependences of various thermodynamic quantities—the paramagnetic moment, entropy, and the zero-energy density of states—are calculated. Those quantities are shown to start quickly growing upon entering the LO state. We also evaluate the wavelength of the LO modulation, the flux line lattice form factors for small-angle neutron scattering, and the NMR spectra to facilitate the identification of the LO state. Two cases of strong and intermediate Pauli paramagnetic effect are studied comparatively. The possibility of the LO phase in,,, and the organic superconductors is critically examined and crucial experiments to identify it are proposed.