论文标题
浆果曲率对超导体中准颗粒动力学的影响
Berry curvature effects on quasiparticle dynamics in superconductors
论文作者
论文摘要
我们通过遵循波袋运动并揭示了通过位置和动量跨越的相位空间中的浆果曲率效应的丰富含量来构建一种超导准颗粒的半经典动力学理论。这些浆果曲率可以追溯到超导性的特征，包括超导配对的非平凡动量空间几何形状，真实空间的超恒星和准粒子的电荷偶极子。浆果膜的影响强烈影响超导体的光谱和转运特性，例如状态的局部密度和热霍尔电导率。作为模型插图，我们将理论应用于使用$ d_ {x^{2}+y^{2}}}+id_ {xy} $超导间隙功能的扭曲的双层石墨烯，并演示浆果曲线诱导的效果。
We construct a theory for the semiclassical dynamics of superconducting quasiparticles by following their wave-packet motion and reveal rich contents of Berry curvature effects in the phase-space spanned by position and momentum. These Berry curvatures are traced back to the characteristics of superconductivity, including the nontrivial momentum-space geometry of superconducting pairing, the real-space supercurrent, and the charge dipole of quasiparticles. The Berry-curvature effects strongly influence the spectroscopic and transport properties of superconductors, such as the local density of states and the thermal Hall conductivity. As a model illustration, we apply the theory to study the twisted bilayer graphene with a $d_{x^{2}+y^{2}}+id_{xy}$ superconducting gap function, and demonstrate Berry-curvature induced effects.
