Dahlem Center for Complex Quantum Systems and Fachbereich Physik, Freie Universität Berlin, 14195 Berlin, Germany.
Phys Rev Lett. 2010 Nov 26;105(22):226407. doi: 10.1103/PhysRevLett.105.226407. Epub 2010 Nov 24.
We develop a theory of energy relaxation and thermalization of hot carriers in clean quantum wires. Our theory is based on a controlled perturbative approach for large excitation energies and emphasizes the important roles of the electron spin and finite temperature. Unlike in higher dimensions, relaxation in one-dimensional electron liquids requires three-body collisions and is much faster for particles than holes which relax at nonzero temperatures only. Moreover, comoving carriers thermalize more rapidly than counterpropagating carriers. Our results are quantitatively consistent with a recent experiment.
我们提出了一个在纯净量子线中热载流子能量弛豫和热化的理论。我们的理论基于对大激发能的受控微扰方法，并强调电子自旋和有限温度的重要作用。与更高维度不同，在一维电子液体中，弛豫需要三体碰撞，对于在非零温度下仅弛豫的粒子比空穴快得多。此外，共动载流子比反向传播载流子热化得更快。我们的结果与最近的实验定量一致。
