α-（ET）2KHg（SCN）4的角相关磁热电势
Angular dependent magnetothermopower of alpha-(ET)2KHg(SCN)4
摘要：
在低于（4 K）和高于（9 K）的转变温度下，测量了准二维有机导体α-（ET）_2KHg（SCN）_4的热电势和能斯特效应与磁场和角度的关系。此外，为了模拟数据，提出了一个涉及q1 D和q2 D带之间磁击穿效应的理论模型。对热电势和能斯特效应背景分量的分析表明，在低温下，α-（ET）2KHg（SCN）4在CDW态的性质主要取决于新的开费米面上的轨道.在这两种热电效应中观察到的量子振荡，在8 T以上的磁场中，仅起源于α轨道。
英文摘要：
The magnetic field and angular dependencies of the thermopower and Nernst effect of the quasi-two-dimensional organic conductor alpha-(ET)2KHg(SCN)4 are experimentally measured at temperatures below (4 K) and above (9 K) the transition temperature to fields of In addition, a theoretical model which involves a magnetic breakdown effect between the q1D and q2D bands is proposed in order to simulate the data. Analysis of the background components of the thermopower and Nernst effect imply that at low temperatures, in the CDW state, the properties of alpha-(ET)2KHg(SCN)4 are determined mostly by the orbits on the new open Fermi sheets. Quantum oscillations observed in the both thermoelectric effects, at fields above 8 T, originate only from the alpha orbit.
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