论文标题
耗散驱动的奇怪金属行为
Dissipation-driven strange metal behavior
论文作者
论文摘要
在量子临界点（QCP）的接近性中经常观察到异常的金属特性，并且违反了费米液体范式。我们提出了一个方案，由于附近QCP的存在，有限相关长度的顺序参数的动态波动介导了整个费米表面上的准粒子中几乎各向同性散射。这种散射会产生异常的金属行为，通过增加波动阻尼的增加，该行为扩展到最低温度。当温度降低时，我们从现象学上识别一个单个参数，统治这种增加的阻尼，这既考虑了线性的温度电阻率，又考虑了观察到的观察到的比热的热量，例如，在高温超导向丘比特和一些繁重的饲料金属中。
Anomalous metallic properties are often observed in the proximity of quantum critical points (QCPs), with violation of the Fermi Liquid paradigm. We propose a scenario where, due to the presence of a nearby QCP, dynamical fluctuations of the order parameter with finite correlation length mediate a nearly isotropic scattering among the quasiparticles over the entire Fermi surface. This scattering produces an anomalous metallic behavior, which is extended to the lowest temperatures by an increase of the damping of the fluctuations. We phenomenologically identify one single parameter ruling this increasing damping when the temperature decreases, accounting for both the linear-in-temperature resistivity and the seemingly divergent specific heat observed, e.g., in high-temperature superconducting cuprates and some heavy-fermion metals.
