论文标题
$ d $ - 波超导体中准粒子干扰的温度依赖性
Temperature dependence of quasiparticle interference in $d$-wave superconductors
论文作者
论文摘要
我们使用基于基于蒙特利亚的 +蒙特 - 卡洛的方案研究了高$ T_C $ cuprates中准颗粒干扰的温度依赖性，以模拟$ d $ - 波 - 波超导订单参数。准粒子干扰模式的特征主要是由于八位位模型在较低温度下的散射向量而产生的。我们的发现表明，由于超过超导过渡过渡$ t_c $，属于八位位模型的散射向量的一组散射向量也以属于八位位模型的散射向量的一组散射向量所主导。但是，当抗邻系间隙变得很小时，超过温度，一组与属于八位位模型的散射向量不同，是跨粒子干扰模式的原因。随着温度的升高，模式越来越宽。
We investigate the temperature dependence of quasiparticle interference in the high $T_c$-cuprates using an Exact-Diagonalization + Monte-Carlo based scheme to simulate the $d$-wave superconducting order parameter. The quasiparticle interference patterns have features largely resulting from the scattering vectors of the octet model at lower temperature. Our findings suggest that the features of quasiparticle interference in the pseudogap region of the phase diagram are also dominated by the set of scattering vectors belonging to the octet model because of the persisting antinodal gap beyond the superconducting transition $T_c$. However, beyond a temperature when the antinodal gap becomes very small, a set of scattering vectors different from those belonging to the octet model are responsible for the quasiparticle interference patterns. With a rise in temperature, the patterns are increasingly broadened.
