T-linear resistivity from magneto-elastic scattering: Application to PdCrO 2
T-linear resistivity from magneto-elastic scattering: Application to PdCrO 2
复制标题
磁弹性散射的 T 线性电阻率：在 PdCrO 2 中的应用
DOI：
10.1073/pnas.2305609120
复制
发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Chowdhury, Debanjan
中科院分区：
文献类型：
--
作者：
Mendez-Valderrama, J. F.;Tulipman, Evyatar;Zhakina, Elina;Mackenzie, Andrew P.;Berg, Erez;Chowdhury, Debanjan
具有巡游载流子和局域磁矩的电子固体代表了一个典型的强关联系统。与流动载体相关的电输运性质，因为它们分散了这些局部时刻，已经在许多材料中进行了仔细研究。在这里，我们分析了与超净PdCrO-一个准二维材料组成的交替层的巡游Pd-电子和莫特绝缘CrOlayers-这表明了一个显着的制度的T-线性电阻率在很宽的中间温度范围内的传输特性。通过将这些观察结果与密切相关的材料PdCoO中的输运性质进行对比，其中CoO层是带绝缘体，我们可以排除传统的电子-声子相互作用对这种有趣的机制负责。我们提出了一个以前忽略的电子磁弹性之间的相互作用的Pd-电子，铬本地的时刻和面外声子的主要散射机制，导致显着增强的电阻率和aT-线性制度在PdCrOat温度远远超过磁有序温度。我们建议一些未来的实验，以确认这一图片在PdCrO 2以及其他层状金属/莫特绝缘材料。
An electronic solid with itinerant carriers and localized magnetic moments represents a paradigmatic strongly correlated system. The electrical transport properties associated with the itinerant carriers, as they scatter off these local moments, have been scrutinized across a number of materials. Here, we analyze the transport characteristics associated with ultraclean PdCrO—a quasi-two-dimensional material consisting of alternating layers of itinerant Pd-electrons and Mott-insulating CrOlayers—which shows a pronounced regime ofT-linear resistivity over a wide range of intermediate temperatures. By contrasting these observations to the transport properties in a closely related material PdCoO, where the CoOlayers are band-insulators, we can rule out the traditional electron–phonon interactions as being responsible for this interesting regime. We propose a previously ignored electron-magneto-elastic interaction between the Pd-electrons, the Cr local moments and an out-of-plane phonon as the main scattering mechanism that leads to the significant enhancement of resistivity and aT-linear regime in PdCrOat temperatures far in excess of the magnetic ordering temperature. We suggest a number of future experiments to confirm this picture in PdCrOas well as other layered metallic/Mott-insulating materials.