Wannier functions for one-dimensionals−poptical superlattices
نویسندگان
چکیده
منابع مشابه
Partly occupied Wannier functions.
We introduce a scheme for constructing partly occupied, maximally localized Wannier functions (WFs) for both molecular and periodic systems. Compared to the traditional occupied WFs the partly occupied WFs possess improved symmetry and localization properties achieved through a bonding-antibonding closing procedure. We demonstrate the equivalence between bonding-antibonding closure and the mini...
متن کاملGeneralized Wannier Functions
We consider single particle Schrodinger operators with a gap in the energy spectrum. We construct a countable set of exponentially decaying functions, which form a complete, orthonormal basis set for the states below the spectral gap. Each such function is localized near a closed surface. Estimates on the exponential decay rate and a discussion of the geometry of these surfaces is included.
متن کاملBloch oscillations and Wannier Stark Ladder study in Semiconductor Superlattices
Président du jury : François JULIEN Directeur de Recherches(HDR), IEF – Univ. Paris Sud Rapporteurs : Olivier GAUTHIER-LAFAYE Chargé de Recherches(HDR), LAASUniv. Paul Sabatier Dominique COQUILLAT Directeur de Recherches(HDR), L2C –Univ. Montpellier 2 Examinateurs : Robson FERREIRA Directeur de Recherches(HDR), LPA – ENS de Paris Bloch oscillations and Wannier Stark Ladder study in Semiconducto...
متن کاملWannier-based definition of layer polarizations in perovskite superlattices.
In insulators, the method of Marzari and Vanderbilt [Phys. Rev. B 56, 12 847 (1997)] can be used to generate maximally localized Wannier functions whose centers are related to the electronic polarization. In the case of layered insulators, this approach can be adapted to provide a natural definition of the local polarization associated with each layer, based on the locations of the nuclear char...
متن کاملMaximally localized Wannier functions for GW quasiparticles
We review the formalisms of the self-consistent GW approximation to many-body perturbation theory and of the generation of optimally localized Wannier functions from groups of energy bands. We show that the quasiparticle Bloch wave functions from such GW calculations can be used within this Wannier framework. These Wannier functions can be used to interpolate the many-body band structure from t...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review A
سال: 2014
ISSN: 1050-2947,1094-1622
DOI: 10.1103/physreva.90.033621