Thermoelectric properties of the stripe-charge ordering phases in IrTe2
Thermoelectric properties of the stripe-charge ordering phases in IrTe2
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DOI：
10.1103/physrevb.103.045102
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发表时间：
2021-01
影响因子：
3.7
通讯作者：
Jungsang You;M. Eom;Minhyea Lee;Y. Jo;C. Won;S. Cheong;Kyoo Kim;J. S. Kim
中科院分区：
文献类型：
--
作者：
Jungsang You;M. Eom;Minhyea Lee;Y. Jo;C. Won;S. Cheong;Kyoo Kim;J. S. Kim
我们研究了条形电荷有序化对${\mathrm{IrTe}}_{2}$的热电势的影响，以及其他输运性质，包括电阻率、热导率和霍尔效应。在条纹电荷有序转变，明确的运输异常，如突然变化的热电势和霍尔效应被观察到，并归因于多带传导由于条纹顺序驱动的费米面（FS）重建。这种FS重建敏感地依赖于层内电荷调制和层间阶梯状排列，导致热电功率的复杂符号变化。这些结果与基于重构FS的Boltzmann输运计算结果吻合得很好，并证实了条纹电荷序对${\mathrm{IrTe}}_{2}$中本征电荷传导的强烈影响。
We investigate the effects of stripe-charge ordering on the thermoelectric power of ${\mathrm{IrTe}}_{2}$, together with other transport properties, including the resistivity, thermal conductivity, and Hall effect. At the stripe-charge ordering transitions, clear transport anomalies such as abrupt changes in the thermoelectric power and Hall effect are observed and attributed to multiband conduction due to stripe-order-driven Fermi surface (FS) reconstruction. This FS reconstruction depends sensitively on intralayer charge modulations and interlayer staircaselike arrangements, leading to complex sign changes in the thermoelectric power. These results are in good agreement with the Boltzmann transport calculations based on the reconstructed FS and confirm the strong impact of the stripe charge order on the intrinsic charge conduction in ${\mathrm{IrTe}}_{2}$.