论文标题
用可调磁纹理设计量子状态
Designing Quantum States with Tunable Magnetic Textures
论文作者
论文摘要
从理论上讲，我们研究了由可切换磁连接连接（MJ）阵列产生的可调磁条纹场对在半导体量子孔中形成的二维（2D）系统的量子状态的影响。通过电气切换单个MJ的磁态，可以通过纳米尺度重新配置由MJ阵列产生的磁性景观。载体和条纹场之间的自旋之间的相互作用产生有效的自旋依赖性电势，其作用于量子点（屏障），对于与磁纹理的自旋平行（反平行）（反平行）的载体作用。磁产生的量子点（屏障）的位置和深度（高度）以及它们之间的耦合可以通过通过单个MJ的开关调节磁纹理来调节它们之间的耦合。这样可以实现量子状态，自旋和传输特性的磁控制，操纵和设计。
We theoretically investigate the effects of tunable magnetic fringe fields generated by arrays of switchable magnetic junctions (MJs) on the quantum states of an underlying two-dimensional (2D) system formed in a semiconductor quantum well. The magnetic landscape generated by the MJ-array can be reconfigured on the nanometer scale by electrically switching the magnetic state of individual MJs. The interaction between the spin of the carriers and the fringe fields generates effective spin-dependent potentials acting like quantum dots (barriers) for carriers with spin parallel (antiparallel) to the magnetic texture. The position and depth (height) of the magnetically generated quantum dots (barriers), as well as the coupling between them, can be tuned by modulating the magnetic texture through switchings of individual MJs. This enables the magnetic control, manipulation, and design of quantum states, their spin, and transport properties.
