论文标题
热力学诱导的稀有金属中的传输异常zrte $ _5 $和hfte $ _5 $
Thermodynamically Induced Transport Anomaly in Dilute Metals ZrTe$_5$ and HfTe$_5$
论文作者
论文摘要
一个40年历史的过渡金属五角叶瑟Zrte $ _5 $和HFTE $ _5 $的难题是纵向电阻率的温度依赖性的异常峰，并伴随着大厅和Seebeck系数的符号逆转。我们对这些现象给出了合理的解释，而不假设任何相变或强烈的相互作用效应。我们表明，由于这些材料中的固有热力学和导电电子的稀释性，化学电位对温度和磁场表现出很大的依赖性。因此，我们计算零场中的电阻率，霍尔和塞贝克系数，以及有限磁场中的磁倍率和霍尔电阻率，在所有这些磁场中，我们重现了实验中观察到的主要特征。
A 40-year-old puzzle in transition metal pentatellurides ZrTe$_5$ and HfTe$_5$ is the anomalous peak in the temperature dependence of the longitudinal resistivity, which is accompanied by sign reverses of the Hall and Seebeck coefficients. We give a plausible explanation for these phenomena without assuming any phase transition or strong interaction effect. We show that due to intrinsic thermodynamics and diluteness of the conducting electrons in these materials, the chemical potential displays a strong dependence on the temperature and magnetic field. With that, we compute resistivity, Hall and Seebeck coefficients in zero field, and magnetoresistivity and Hall resistivity in finite magnetic fields, in all of which we reproduce the main features that are observed in experiments.
