Magnetoresistance effects in a spin-fermion model for multilayers
Magnetoresistance effects in a spin-fermion model for multilayers
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多层自旋费米子模型中的磁阻效应
DOI：
10.1103/physrevb.102.094423
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发表时间：
2020-09
期刊：
影响因子：
--
通讯作者：
Rubem Mondaini
中科院分区：
文献类型：
--
作者：
Sabyasachi Tarat;Jian Li;Richard Scalettar;Rubem Mondaini
我们考虑了一个自旋特性模型，该模型由耦合到经典旋转的游离电子组成，后者嵌入在准中二维超晶格结构中，该结构由由无旋转缓冲液隔开的自旋块组成。使用螺旋ansatz进行
We consider a spin-fermion model consisting of free electrons coupled to classical spins where the latter are embedded in a quasi-one-dimensional superlattice structure consisting of spin blocks separated by spinless buffers. Using a spiral ansatz for the spins, we study the effect of the electron mediated Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction on the $T=0$ ground state of the system. We find that the RKKY interaction can lead to ferromagnetic, antiferromagnetic, or intermediate spiral phases for different system parameters. When the width is much larger than the length of the individual blocks, the spiral phases are suppressed, and the ground state oscillates between ferromagnetic and antiferromagnetic orders as the size of the buffer regions is varied. This is accompanied by a corresponding oscillation in the Drude weight reflecting an increased conductivity in the ferromagnetic state compared to the antiferromagnetic one. These results are reminiscent of classic giant magnetoresistance phenomena observed in a similar geometry of thin sandwiched magnetic and nonmagnetic layers. Our analysis provides a robust framework for understanding the role of the RKKY interaction on the ground-state order and corresponding transport properties of such systems, extending beyond the conventional perturbative regime.
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影响因子：
3.7
作者：
I. Reis;D. Marchand;M. Franz
通讯作者：
I. Reis;D. Marchand;M. Franz
DOI：
10.1142/2945
发表时间：
1999-01
期刊：
--
影响因子：
--
作者：
P. Fazekas
通讯作者：
P. Fazekas
影响因子：
8.6
作者：
M. Mayr;G. Alvarez;C. Şen;E. Dagotto
通讯作者：
M. Mayr;G. Alvarez;C. Şen;E. Dagotto
影响因子：
8.6
作者：
Buhler;Yunoki;Moreo
通讯作者：
Buhler;Yunoki;Moreo
影响因子：
3.7
作者：
W. Lv;F. Kruger;P. Phillips
通讯作者：
W. Lv;F. Kruger;P. Phillips