Abstract
The interplay between electron-phonon and electron-electron interactions in quasi-one-dimensional systems can give rise to competition and possible coexistence of various symmetry broken ground states like bond-order-wave (BOW), charge-density-wave (CDW) and spin-density-wave (SDW). The halogen-bridged mixed-valence transition-metal linear chain complexes (HMMC or MX chains) is a typical example of such systems. In this and a companion paper, we study the ground states and localized excitations like polarons and excitons in these competing systems using a single band Peierls-Hubbard model and the Bogoliubov-de Gennes formalism. We first focus on configurations of these excitations and number of bound states within the gap in competing BOW and CDW systems as functions of the electron-phonon coupling strength. The lattice relaxation approach to quasi-one-dimensional systems, developed by Su and Yu earlier, has been applied to study the radiative and non-radiative transitions of these excitations. A non-monotonic dependence of the relaxation rate on the coupling strength is predicted from the theory and is mainly due to the emergence of new bound states inside the gap. The possible connection of this effect with photoluminescence experiments is discussed. Similar phenomena may occur in other quasi-one-dimensional systems as well. (author). 28 refs, 13 figs, 1 tab.
Chuilin, Wang;
Wenzheng, Wang;
Zhaobin, Su;
Lu, Yu;
[1]
Guoling, Gu
[2]
- International Centre for Theoretical Physics, Trieste (Italy)
- Academia Sinica, Beijing, BJ (China). Inst. of Theoretical Physics
Citation Formats
Chuilin, Wang, Wenzheng, Wang, Zhaobin, Su, Lu, Yu, and Guoling, Gu.
Localized excitations in competing bond-order-wave, charge-density-wave and spin-density-wave systems 1: Competing bond-order-wave and charge-density-wave.
IAEA: N. p.,
1992.
Web.
Chuilin, Wang, Wenzheng, Wang, Zhaobin, Su, Lu, Yu, & Guoling, Gu.
Localized excitations in competing bond-order-wave, charge-density-wave and spin-density-wave systems 1: Competing bond-order-wave and charge-density-wave.
IAEA.
Chuilin, Wang, Wenzheng, Wang, Zhaobin, Su, Lu, Yu, and Guoling, Gu.
1992.
"Localized excitations in competing bond-order-wave, charge-density-wave and spin-density-wave systems 1: Competing bond-order-wave and charge-density-wave."
IAEA.
@misc{etde_10132459,
title = {Localized excitations in competing bond-order-wave, charge-density-wave and spin-density-wave systems 1: Competing bond-order-wave and charge-density-wave}
author = {Chuilin, Wang, Wenzheng, Wang, Zhaobin, Su, Lu, Yu, and Guoling, Gu}
abstractNote = {The interplay between electron-phonon and electron-electron interactions in quasi-one-dimensional systems can give rise to competition and possible coexistence of various symmetry broken ground states like bond-order-wave (BOW), charge-density-wave (CDW) and spin-density-wave (SDW). The halogen-bridged mixed-valence transition-metal linear chain complexes (HMMC or MX chains) is a typical example of such systems. In this and a companion paper, we study the ground states and localized excitations like polarons and excitons in these competing systems using a single band Peierls-Hubbard model and the Bogoliubov-de Gennes formalism. We first focus on configurations of these excitations and number of bound states within the gap in competing BOW and CDW systems as functions of the electron-phonon coupling strength. The lattice relaxation approach to quasi-one-dimensional systems, developed by Su and Yu earlier, has been applied to study the radiative and non-radiative transitions of these excitations. A non-monotonic dependence of the relaxation rate on the coupling strength is predicted from the theory and is mainly due to the emergence of new bound states inside the gap. The possible connection of this effect with photoluminescence experiments is discussed. Similar phenomena may occur in other quasi-one-dimensional systems as well. (author). 28 refs, 13 figs, 1 tab.}
place = {IAEA}
year = {1992}
month = {Nov}
}
title = {Localized excitations in competing bond-order-wave, charge-density-wave and spin-density-wave systems 1: Competing bond-order-wave and charge-density-wave}
author = {Chuilin, Wang, Wenzheng, Wang, Zhaobin, Su, Lu, Yu, and Guoling, Gu}
abstractNote = {The interplay between electron-phonon and electron-electron interactions in quasi-one-dimensional systems can give rise to competition and possible coexistence of various symmetry broken ground states like bond-order-wave (BOW), charge-density-wave (CDW) and spin-density-wave (SDW). The halogen-bridged mixed-valence transition-metal linear chain complexes (HMMC or MX chains) is a typical example of such systems. In this and a companion paper, we study the ground states and localized excitations like polarons and excitons in these competing systems using a single band Peierls-Hubbard model and the Bogoliubov-de Gennes formalism. We first focus on configurations of these excitations and number of bound states within the gap in competing BOW and CDW systems as functions of the electron-phonon coupling strength. The lattice relaxation approach to quasi-one-dimensional systems, developed by Su and Yu earlier, has been applied to study the radiative and non-radiative transitions of these excitations. A non-monotonic dependence of the relaxation rate on the coupling strength is predicted from the theory and is mainly due to the emergence of new bound states inside the gap. The possible connection of this effect with photoluminescence experiments is discussed. Similar phenomena may occur in other quasi-one-dimensional systems as well. (author). 28 refs, 13 figs, 1 tab.}
place = {IAEA}
year = {1992}
month = {Nov}
}