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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Electron-LO-phonon intrasubband scattering rates near a cylindrical cavity; Axial applied magnetic field
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Electron-LO-phonon intrasubband scattering rates near a cylindrical cavity; Axial applied magnetic field

机译:圆柱形腔附近的电子-LO-声子子带内散射率;轴向施加磁场

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The electron-LO-phonon intrasubband scattering rates near a cylindrical cavity are calculated as functions of the axial applied magnetic field and the electric potential of the heterostructure. Anticipating the confinement of phonons to be rather weak, scattering of electrons is assumed to be via bulk phonon modes. The electron's energy subbands are obtained within the effective-mass approximation. An increase of the magnetic field leads to the lowest-order electron's energy subbands taking turns at becoming the ground state, following the sequence {m = 0, -1, -2... -N} of azimuthal quantum numbers. This is a direct consequence of the presence of a hole which, for infinite walls of the potential, is a forbidden region for the motion of the electrons. A given value of the magnetic field therefore selects a particular electron's energy subband for the ground-state intrasubband scattering process. The main prediction of these investigations is the considerable enhancement of the intrasubband scattering rates for a very small radius of the cavity. [References: 28]
机译:计算圆柱形腔附近的电子-LO-声子子带内散射率,作为轴向施加磁场和异质结构电势的函数。预期声子的约束很弱,因此假设电子的散射是通过体声子模式进行的。在有效质量近似范围内获得电子的能量子带。磁场的增加会导致最低阶电子的能量子带按照方位量子数的序列{m = 0,-1,-2 ... -N}依次变为基态。这是存在空穴的直接结果,该空穴对于无限大的势垒壁是电子运动的禁区。因此,给定的磁场值为基态子带内散射过程选择特定的电子能量子带。这些研究的主要预测是对于非常小的空腔半径,子带内散射速率的显着提高。 [参考:28]

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