局域大自旋模型的热偏压输运特性  

Transport Properties of Thermal Bias in Local Large Spin Model

作　　者：闫红叶 牛鹏斌 YAN Hongye;NIU Pengbin(Department of Physics,Shanxi Datong University,Datong 037009,China)

机构地区：[1]山西大同大学物理系,山西大同037009

出　　处：《山西大学学报（自然科学版）》2020年第2期304-310,共7页Journal of Shanxi University(Natural Science Edition)

摘　　要：文章讨论热偏压驱动的各向同性人工分子磁体电流特性。在温差趋动下,不同输运通道会产生费米面上方或下方的电流,进而叠加或抵消,展现出不同的电流特性。研究发现各向同性人工分子磁体自旋S无论为多大,输运通道始终只有两条,且通道都在费米面一侧时,大温差下的各单占据态概率趋于相等,对电流的贡献也一样大,通道分布于费米面两侧时,大温差下费米面下方的反向电流幅度远大于上方的正向电流,说明电子输运中趋向处于低能态。We study current properties in an isotropic single molecular magnet junction as a function of temperature difference.It is found that the probabilities of single occupied states are equal when various molecule energy levels are both above the Fermi surface or both below the Fermi surface in large temperature difference.There are forward current when the states are above the Fermi surface and backward current when the states are below the Fermi surface.The backward current is larger than forward current when all molecule energy levels are distributed on both sides of the Fermi surface.This result shows that the electrons would like to occupy lower energy levels in quantum transport.

关 键 词：人工分子磁体 热偏压 温差电流 

分 类 号：TM271[一般工业技术—材料科学与工程]