Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Interface Phonons and Polaron Effect in Quantum Wires | Nanoscale Res Lett 2010 5 1744-1748 DOI s11671-010-9704-0 NANO EXPRESS Interface Phonons and Polaron Effect in Quantum Wires A. Yu. Maslov O. V. Proshina Received 22 June 2010 Accepted 13 July 2010 Published online 11 August 2010 The Author s 2010. This article is published with open access at Abstract The theory of large radius polaron in the quantum wire is developed. The interaction of charge particles with interface optical phonons as well as with optical phonons localized in the quantum wire is taken into account. The interface phonon contribution is shown to be dominant for narrow quantum wires. The wave functions and polaron binding energy are found. It is determined that polaron binding energy depends on the electron mass inside the wire and on the polarization properties of the barrier material. Keywords Quantum wire Electron-phonon interaction Interface phonons Polaron Introduction The electron-phonon interaction in semiconductor heterostructures is of greater interest in comparison to bulk materials. This is due to the fact that the quasi-particle space localization leads to the modifications of the energy spectrum. The all-important factor is the rise of new vibration branches of optical spectrum namely the interface optical phonon 1 . In addition the intensity of electron-phonon interaction is changed. The interaction of charge particles with polar optical phonons should exhibit the most intensity. This interaction is of considerable importance in the understanding of the properties of heterostructures based on material with high ionicity. It can A. Yu. Maslov O. V. Proshina Ioffe Physical-Technical Institute of the Russian Academy of Sciences Saint Petersburg Russia e-mail lead to self-consistent bond state of a charge particle and phonons that is the large radius polaron 2 . Currently an investigation on the part played by interface phonons has attracted considerable interest in polaron state .
