标题： Sb浓度依赖的多晶（Bi1-xSbx）2Te3固溶体的结构和输运性质 显示英文标题

标题： Sb concentration dependent Structural and Transport properties of Polycrystalline (Bi1-xSbx)2Te3 Mixed crystal

摘要： (Bi1-xSbx)2Te3 (x=0.60, 0.65, 0.68, 0.70, 0.75 and 0.80) 混合晶体通过固态反应合成。 深入的结构、热、输运和电子特性已被报道。 缺陷和无序在结构和输运行为中起着关键作用。 在x=0.70时观察到由无序引起的同结构相变，这得到了结构和输运特性数据的支持。 德拜温度已从粉末衍射数据中估算出来。 差示扫描量热法（DSC）数据证实了材料中的玻璃转变。 低温电阻率数据表明存在可变范围跳跃机制，而高温数据则遵循激活行为。 激活能是从电阻率数据的半导体区域计算出来的。 霍尔测量和温度依赖的赛贝克系数数据（S(T)）证实样品具有p型特性。 态密度有效质量已通过Pisarenko关系估算，并与电阻率数据一致。 热导率（k）是利用实验获得的数据估算的。 使用电阻率、S(T)和k计算了合成样品的优值（ZT）。结构和输运特性相关联，证实了从无序到有序状态的转变。 缺陷和无序与结构和热电特性一致。 合成样品的热电特性。 显示英文摘要

摘要： (Bi1-xSbx)2Te3 (x=0.60, 0.65, 0.68, 0.70, 0.75 and 0.80) mixed crystals have been synthesized by solid state reaction. In depth structural, thermal, transport and electronic properties are reported. Defect and disorder play a crucial role in structural and transport behaviour. Disorder induced iso-structural phase transition is observed at x=0.70, which is supported by the structural and transport properties data. Debye temperature has been estimated from the powder diffraction data. Differential scanning calorimetry (DSC) data confirms the glass transition in the material. Low temperature resistivity data shows Variable range hopping mechanism whereas high temperature data follows activated behaviour. Activation energy is calculated from the semiconducting region of resistivity data. Both Hall measurement and temperature dependent thermopower data (S(T)) confirms that samples are p-type in nature. Density of state effective mass has been estimated from Pisarenko relation and corroborated with resistivity data. Thermal conductivity (k) is estimated using experimentally obtained data. Figure of Merit (ZT) of the synthesized samples are calculated using resistivity, S(T) and k. Structural and transport properties are correlated, confirms the transition from disorder to order state. Defect and disorder are corroborated with structural and Thermoelectric properties of the synthesized samples.