局域振动模的非弹性散射
Inelastic Scattering from Local Vibrational Modes
摘要：
我们研究了由于局部振动模式的传导电子的退相速率的非普适贡献。非弹性散射率的强烈影响，多声子激发，表现出振荡行为。对于较高的频率，它饱和到一个有限的，耦合相关的值。在强耦合极限下，声子几乎完全软化，非弹性截面达到最大值。这代表除了磁性杂质之外，磁场对介观系统中的退相时间的不敏感贡献。
英文摘要：
We study a nonuniversal contribution to the dephasing rate of conduction electrons due to local vibrational modes. The inelastic scattering rate is strongly influenced by multiphonon excitations, exhibiting oscillatory behaviour. For higher frequencies, it saturates to a finite, coupling dependent value. In the strong coupling limit, the phonon is almost completely softened, and the inelastic cross section reaches its maximal value. This represents a magnetic field insensitive contribution to the dephasing time in mesoscopic systems, in addition to magnetic impurities.
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