Exchange and correlation effects in electronic excitations of Cu2O
Title | Exchange and correlation effects in electronic excitations of Cu2O |
Publication Type | Palaiseau Article |
Acknowledgements | None |
Author Address | Bruneval, F (Reprint Author), Ecole Polytech, Solides Irradies Lab, CEA, CNRS,UMR 7642, F-91128 Palaiseau, France. Ecole Polytech, Solides Irradies Lab, CEA, CNRS,UMR 7642, F-91128 Palaiseau, France. ETSF, Palaiseau, France. Synchrotron Soleil, F-91192 Gif Sur Yvette, France. CEA Saclay, DSM, DRECAM, SPCSI, F-91191 Gif Sur Yvette, France. |
DOI | 10.1103/PhysRevLett.97.267601 |
Bruneval, F, Vast, N, Reining, L, Izquierdo, M, Sirotti, F, Barrett, N | |
Publisher | AMERICAN PHYSICAL SOC |
Year of Publication | 2006 |
Journal | Phys. Rev. Lett. |
Volume | 97 |
Type of Work | Article |
URL | http://dx.doi.org/10.1103/PhysRevLett.97.267601 |
Keywords | paper |
Pagination | 267601 |
Abstract | State-of-the-art theoretical methods fail in describing the optical absorption spectrum, band gap, and optical onset of Cu2O. We have extended a recently proposed self-consistent quasiparticle approach, based on the GW approximation, to the calculation of optical spectra, including excitonic effects. The band structure compares favorably with our present angle-resolved photoemission measurements. The excitonic effects based on these realistic band structure and screening provide a reliable optical absorption spectrum, which allows for a revised interpretation of its main structures. |
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