Global-local ansatz and dynamical coherent potential approximation study of off-diagonal exciton-phonon coupling

• المؤلفون الرئيسيون: Liu, Qingmei, Zhao, Yang, Wang, Weihua, Kato, Tsuyoshi
• مؤلفون آخرون: School of Materials Science & Engineering
• التنسيق: مقال
• اللغة: English
• منشور في: 2011
• الموضوعات: DRNTU::Science::Physics::Atomic physics::Solid state physics
• الوصول للمادة أونلاين: https://hdl.handle.net/10356/99800; http://hdl.handle.net/10220/6740
• المؤسسة: Nanyang Technological University

We study the generalized Holstein Hamiltonian in the simultaneous presence of diagonal and off-diagonal exciton-phonon couplings using the global-local Ansatz and the dynamical coherent potential approximation (under the Hartree approximation). The former yields detailed exciton-phonon correlations...