论文标题
开放轨道磁转运的呼吸模式：具有量子机械焦距的磁性镜头
Breathing mode in open-orbit magnetotransport: a magnetic lens with a quantum mechanical focal length
论文作者
论文摘要
我们考虑在$ x $ - $ y $ plane（晶格常数$ a $）中具有各向异性分散的晶格中电子的繁殖，因此它支持沿$ x $轴的开放轨道，以$ x $轴$ x $轴$ b $。我们表明，一个点源激发了“呼吸模式”，这种状态在$ x $ - 方向中在距离上传播$ \ ell =（eab/h）^{ - 1} $后，定期传播和重新集中。与经典回旋子半径控制的已知磁聚焦效应不同，这是一种本质上具有量子机械效应，具有焦距$ \ propto \ hbar $。
We consider the propagation of electrons in a lattice with an anisotropic dispersion in the $x$--$y$ plane (lattice constant $a$), such that it supports open orbits along the $x$-axis in an out-of-plane magnetic field $B$. We show that a point source excites a "breathing mode", a state that periodically spreads out and refocuses after having propagated over a distance $\ell =(eaB/h)^{-1}$ in the $x$-direction. Unlike known magnetic focusing effects, governed by the classical cyclotron radius, this is an intrinsically quantum mechanical effect with a focal length $\propto\hbar$.
