论文标题
疾病驱动的耗散量子关键作为奇怪金属行为的来源
Disorder-driven dissipative quantum criticality as a source of strange metal behavior
论文作者
论文摘要
奇怪的金属行为通常以线性温度（t）电阻率为特征，是固态物理学中仍未解决的谜团。通常，它与关注相关发散阶参数相关长度的量子临界点（温度t = 0的二阶转换）的接近度有关。在这里，我们提出了一个范式的转移，由于耗散作用在波动的临界模式上，而其相关长度保持有限，因此集中在不同的特征时间尺度上。为了实现发散的耗散，我们提出了一种基于局部顺序参数波动和电子扩散模式之间的耦合的机制，该模式既说明了线性中的电阻率，又是对数比温度比c_v/t〜 log（1/t）的耦合。
The strange metal behavior, usually characterized by a linear-in-temperature (T) resistivity, is a still unsolved mystery in solid-state physics. Usually it is associated with the proximity to a quantum critical point (a second order transition at temperature T = 0) focusing on the related divergent order parameter correlation length. Here, we propose a paradigmatic shift, focusing on a divergent characteristic time scale due to a divergent dissipation acting on the fluctuating critical modes, while their correlation length stays finite. To achieve a divergent dissipation, we propose a mechanism based on the coupling between a local order parameter fluctuation and electronic diffusive modes, that accounts both for the linear-in-T resistivity and for the logarithmic specific heat versus temperature ratio C_V/T ~ log(1/T), down to low temperatures.
