Strongly correlated electrons in the ferroelectric metal LiOsO3
Strongly correlated electrons in the ferroelectric metal LiOsO3
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DOI：
10.1103/physrevb.104.115130
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发表时间：
2021-09
影响因子：
3.7
通讯作者：
J. Zhou;X. Li;J. M. He;J. Chen;K. Yamaura
中科院分区：
文献类型：
--
作者：
J. Zhou;X. Li;J. M. He;J. Chen;K. Yamaura
金属在下面经历向极性相的转变。这种不寻常的性质为研究自由电子和电偶极子之间的相互作用提供了一个独特的机会。我们报告了一套测量的物理性能作为温度的函数，包括电阻率和磁阻下降到0.16 K，热电功率，高精度磁化，比热，和热导率的纹理单晶样品。电子对比热和顺磁磁化率的贡献的增强表明，电子是高度相关的。一个非常大的Kadowaki-Woods比也支持强关联电子的论点。在上述非极性相中，电子强烈地耦合到晶格振动，这导致高温下的电阻率饱和，并最终交叉到跳跃传导。热导率和比热的数据符合有序-无序转变。对电阻率、比热和热导率的临界行为的分析，为理解电子-偶极相互作用提供了有用的信息。
The metallicundergoes a transition to a polar phase below. This unusual property provides a unique opportunity to study the interaction between free electrons and electric dipoles. We report a suite of measurements of physical properties inas a function of temperature, including resistivity and magnetoresistance down to 0.16 K, thermoelectric power, high-precision magnetization, specific heat, and thermal conductivity on textured single-crystal samples. Enhancements from the electron contribution to the specific heat and the paramagnetic susceptibility indicate that electrons inare highly correlated. An anomalously large Kadowaki-Woods ratio also supports the argument of strongly correlated electrons in. In the nonpolar phase above, electrons are coupled strongly to the lattice vibrations, which leads to the resistivity saturation at high temperatures and eventually a crossover to the hopping conduction. The data of thermal conductivity and specific heat are consistent with an order-disorder transition at. The analysis of critical behavior in the resistivity, specific heat, and the thermal conductivity provides useful information for understanding the electron-dipole interaction in.