过阻尼集体模式拖曳引起的异常热电势
Anomalous thermopower from the drag of overdamped collective modes
AI总结：
受高温超导铜氧化物中Seebeck系数比在低温下呈对数发散的启发，提出过阻尼集体模式拖曳可导致金属热电势异常，为奇异金属行为提供新解释。
摘要：
受高温超导铜氧化物中Seebeck系数比在低温下表现出看似对数发散的观测启发，我们表明，如果被拖曳的集体模式是过阻尼的，且其阻尼系数随温度降低而增大，则类似于标准声子拖曳的机制可以在金属的热电势中引起异常。我们的发现为在许多不同系统中观察到的奇异金属行为之谜增添了一块拼图，并支持了我们的提议，即过阻尼电荷密度涨落可能对高温超导铜氧化物中的这种行为负责。
英文摘要：
Inspired by the observation of a Seebeck coefficient ratio that exhibits a seemingly logarithmic divergence at low temperature in high-temperature superconducting cuprates, we show that a mechanisms similar to the standard phonon drag can give rise to anomalies in the thermopower of a metal, if the dragged collective mode is overdamped, with a damping coefficient that increases with lowering the temperature. Our finding adds a piece to the puzzle of the strange-metal behavior observed in many different systems and supports our proposal that overdamped charge density fluctuations can be responsible of such a behavior in high-temperature superconducting cuprates.
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