标题： 三带赝自旋-1狄拉克-外尔系统中通过绝热调制势垒的量子泵浦 显示英文标题

标题： Quantum pumping with adiabatically modulated barriers in three-band pseudospin-1 Dirac-Weyl systems

摘要： 在本工作中，研究了基于赝自旋-1狄拉克-外尔费米子的绝热驱动双势垒结构中的泵浦电流。 由于三能带色散及其导致的赝自旋-1狄拉克-外尔准粒子的独特性质，在特定参数设置下，尤其是在能带结构的狄拉克点处，发现电流方向发生尖锐反转，此时两个锥体的顶点接触于平带。 这种行为可以通过散射矩阵的贝里相位和经典转盘机制一致地解释。 显示英文摘要

摘要： In this work, pumped currents of the adiabatically-driven double-barrier structure based on the pseudospin-1 Dirac-Weyl fermions are studied. As a result of the three-band dispersion and hence the unique properties of pseudospin-1 Dirac-Weyl quasiparticles, sharp current-direction reversal is found at certain parameter settings especially at the Dirac point of the band structure, where apexes of the two cones touches at the flat band. Such a behavior can be interpreted consistently by the Berry phase of the scattering matrix and the classical turnstile mechanism.