论文标题
新型全息量子相变模型中的电荷传输特性
Charge transport properties in a novel holographic quantum phase transition model
论文作者
论文摘要
我们研究了具有两个金属相的新全息量子相变（QPT）模型中电荷转运的特征：正常金属和新型金属。在两个金属相中，在低温下，直流电阻（DC）电阻率和热导率的缩放行为均已数值计算。由近地平线几何形状控制的数值结果和分析结果完全一致。然后，系统地研究了低频交替电流（AC）电导率的特征。一个显着的特征是，正常的金属相是一个连贯的系统，而新型金属相是一个不连贯的内在电导率的不连贯系统。尤其是在新型的金属阶段，当动量耗散的强度增强时，不一致的行为变得更强。
We investigate the features of charge transport in a novel holographic quantum phase transition (QPT) model with two metallic phases: normal metallic and novel metallic. The scaling behaviors of direct current (DC) resistivity and thermal conductivity at low temperatures in both metallic phases are numerically computed. The numerical results and the analytical ones governed by the near horizon geometry agree perfectly. Then, the features of low-frequency alternating current (AC) electric conductivity are systematically investigated. A remarkable characteristic is that the normal metallic phase is a coherent system, whereas the novel metallic phase is an incoherent system with non-vanishing intrinsic conductivity. Especially, in the novel metallic phase, the incoherent behavior becomes stronger when the strength of the momentum dissipation enhances.
