论文标题
通过量子点通过电子 - 音波相互作用进行传输
Transport Through a Quantum Dot with Electron-Phonon Interaction
论文作者
论文摘要
从理论上讲，我们研究了连接到两个正常导电引线的单个水平量子点的电运输特性，并耦合到晶格振动。我们在两种不同的情况下通过量子点确定电流：无时间依赖和时间平均。在所有情况下，我们都会考虑三种情况：当没有电子形声相互作用时，当点电子与光学声子相互作用或当它们与声音子相互作用时。在有限温度下，我们考虑了化学势的温度依赖性。我们通过规范转换方法处理电子音波相互作用。在电子宽量光学声子相互作用的情况下，光谱包含一个宽面积。在电子声音声子相互作用的情况下，频谱是连续的。在时间平均的情况下，由于外部时间调节，许多寄生虫峰出现在光谱中。
We theoretically study the electrical transport properties of a single level quantum dot connected to two normal conducting leads, which is coupled to the lattice vibrations. We determine the current through the quantum dot in two different situations: time-independent and time-averaged. In all situations we consider three cases: when there is no electron-phonon interaction, when the dot electrons interact with optical phonons or when they interact with acoustic phonons. At finite temperatures we take into account the temperature dependence of the chemical potential. We treat the electron-phonon interaction by the canonical transformation method. In the case of electron-longitudinal optical phonon interaction the spectrum contains a subpeak. In the case of electron-acoustic phonon interaction the spectrum is continuous. In the time-averaged situation many parasite peaks appear in the spectrum, due to the external time-modulation.
