Ba（Fe1-xCox）2As 2，0 \leqx PDMATHAAC 0.05和Ba（Fe1-xRhx）2As 2，（0 \leqx \leq 0.171）的热电功率
Thermoelectric power of Ba(Fe1-xCox)2As2, 0\leqx\leq0.05, and Ba(Fe1-xRhx)2As2, (0\leqx\leq0.171)
摘要：
本文给出了Ba（Fe 1-xCox）2As 2，0 \leqx \leq 0.05和Ba（Fe 1-xRhx）2As 2，0 \leqx \leq 0.171单晶的温度依赖性面内热电功率数据。鉴于以前的热电功率和角度分辨光电子能谱研究的Ba（Fe 1-xCox）2As 2划定了一个相当大的钴浓度范围内的Lifshitz转变发生，和欠掺杂侧的相图探索不足，新的测量热电功率紧密间隔的浓度Co，0 \leqx \leq 0.05，进行了。这些数据表明存在Lifshitz转变的证据，但在0 \leqx \leq 0.05之间，热电功率没有不连续的跳跃，而是随着x的增加，观察到S（T）曲线图中更渐进的演变。Ba（Fe_（1-x）Rhx）_2As_2的热电势数据显示出与Co取代的BaFe_2As_2非常相似的行为。这些热电势数据进一步证实了上述两种体系的T-x相图.
英文摘要：
Temperature-dependent, in-plane, thermoelectric power data are presented for single crystals of Ba(Fe1-xCox)2As2, 0\leqx\leq0.05, and Ba(Fe1-xRhx)2As2, (0\leqx\leq0.171). Given that previous thermoelectric power and angle resolved photoemission spectroscopy studies of Ba(Fe1-xCox)2As2 delineated a rather large Co-concentration range for Lifshitz transitions to occur, and the underdoped side of the phase diagram is poorly explored, new measurements of thermoelectric power on tightly spaced concentrations of Co, 0\leqx\leq0.05, were carried out. The data suggest evidence of a Lifshitz transition, but instead of a discontinuous jump in thermoelectric power between 0\leqx\leq0.05, a more gradual evolution in the S(T) plots as x is increased was observed. The thermoelectric power data of Ba(Fe1-xRhx)2As2 show very similar behavior to that of Co substituted BaFe2As2. The previously outlined T - x phase diagrams for both systems are further confirmed by these thermoelectric power data.
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