Phonon runaway in carbon nanotube quantum dots

作     者：L. Siddiqui A. W. Ghosh S. Datta 

作者机构：NSF Network for Computational Nanotechnology Purdue University West Lafayette Indiana 47907 USA Department of Electrical and Computer Engineering University of Virginia Charlottesville Virginia 22903 USA 

出 版 物：《Physical Review B》 

年 卷 期：2007年第76卷第8期

页      面：085433-085433页

核心收录：

摘      要：We explore electronic transport in a nanotube quantum dot strongly coupled with vibrations and weakly with leads and the thermal environment. We show that the recent observation of anomalous conductance signatures in single-walled carbon nanotube quantum dots [B. J. LeRoy et al., Nature (London) 395, 371 (2004) and B. J. LeRoy et al., Phys. Rev. B 72, 075413 (2005)] can be understood quantitatively in terms of current driven “hot phonons that are strongly correlated with electrons. Using rate equations in the many-body configuration space for the joint electron-phonon distribution, we argue that the variations are indicative of strong electron-phonon coupling requiring an analysis beyond the traditional uncorrelated phonon-assisted transport (Tien-Gordon) approach.