Design of effective kernels for spectroscopy and molecular transport: Time-dependent current–density-functional theory

Abstract : Time-dependent current–density-functional theory (TDCDFT) provides an, in principle, exact scheme to calculate efficiently response functions for a very broad range of applications. However, the lack of approximations valid for a range of parameters met in experimental conditions has so far delayed its extensive use in inhomogeneous systems. On the other side, in many-body perturbation theory accurate approximations are available, but at a price of a higher computational cost. In the present work, the possibility of combining the advantages of both approaches is exploited. In this way, an exact equation for the exchange-correlation kernel of TDCDFT is obtained, which opens the way for a systematic improvement of the approximations adopted in practical applications. Finally, an approximate kernel for an efficient calculation of spectra of solids and molecular conductances is suggested and its validity is discussed.
Document type :
Journal articles
Complete list of metadatas

https://hal-polytechnique.archives-ouvertes.fr/hal-00577065
Contributor : Gaëlle Bruant <>
Submitted on : Wednesday, March 16, 2011 - 10:55:26 AM
Last modification on : Wednesday, March 27, 2019 - 4:26:01 PM

Links full text

Identifiers

Collections

Citation

Matteo Gatti. Design of effective kernels for spectroscopy and molecular transport: Time-dependent current–density-functional theory. Journal of Chemical Physics, American Institute of Physics, 2011, 134, pp.084102. ⟨10.1063/1.3558738⟩. ⟨hal-00577065⟩

Share

Metrics

Record views

156