Abstract
Highlights: • The model calculation treats CDW interaction as pseudogap for cuprates. • The interplay of Raman active CDW-SDW mixed modes are investigated. • Independent CDW and SDW gap values can be determined from experimental data. -- Abstract: Raman scattering is one of the most powerful methods to investigate the electron as well as the phonon excitations in the systems. In this communication, we present a theoretical study of Raman scattering in the normal state of the high-T{sub C} systems in the under-doped region displaying the interplay of the spin-density-wave (SDW) and charge-density-wave (CDW) interactions. The SDW order arises from the repulsive Coulomb interaction of electrons, while the CDW order arises due to strong electron–phonon interaction giving rise to Fermi surface instability. We calculate phonon response function in order to examine the possibility of observing the SDW excitation mode in presence of the CDW interaction present in the same conduction band. The Raman scattering intensity is calculated from the imaginary part of the phonon Green’s function assigning an arbitrary spectral width. The spectral density function displays two mixed modes of excitation peaks at energies 2(Δ{sub c} ± Δ{sub s}). The evolution of excitation peaks are investigated by varying CDW coupling,
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Raj, B. K.;
[1]
Panda, S. K.;
[2]
Rout, G.C., E-mail: gcr@iopb.res.in
[3]
- Dept. of Physics, Govt. Autonomous College, Angul, Orissa (India)
- KD Science College, Pochilima, Hinjilicut, 761 101 Ganjam, Orissa (India)
- Condensed Matter Physics Group, PG Dept. of Applied Physics and Ballistics, FM University, Balasore 756 019 (India)
Citation Formats
Raj, B. K., Panda, S. K., and Rout, G.C., E-mail: gcr@iopb.res.in.
Microscopic theoretical study of Raman spectra in charge and spin ordered cuprate systems.
Netherlands: N. p.,
2013.
Web.
doi:10.1016/J.PHYSC.2013.05.024.
Raj, B. K., Panda, S. K., & Rout, G.C., E-mail: gcr@iopb.res.in.
Microscopic theoretical study of Raman spectra in charge and spin ordered cuprate systems.
Netherlands.
https://doi.org/10.1016/J.PHYSC.2013.05.024
Raj, B. K., Panda, S. K., and Rout, G.C., E-mail: gcr@iopb.res.in.
2013.
"Microscopic theoretical study of Raman spectra in charge and spin ordered cuprate systems."
Netherlands.
https://doi.org/10.1016/J.PHYSC.2013.05.024.
@misc{etde_22241405,
title = {Microscopic theoretical study of Raman spectra in charge and spin ordered cuprate systems}
author = {Raj, B. K., Panda, S. K., and Rout, G.C., E-mail: gcr@iopb.res.in}
abstractNote = {Highlights: • The model calculation treats CDW interaction as pseudogap for cuprates. • The interplay of Raman active CDW-SDW mixed modes are investigated. • Independent CDW and SDW gap values can be determined from experimental data. -- Abstract: Raman scattering is one of the most powerful methods to investigate the electron as well as the phonon excitations in the systems. In this communication, we present a theoretical study of Raman scattering in the normal state of the high-T{sub C} systems in the under-doped region displaying the interplay of the spin-density-wave (SDW) and charge-density-wave (CDW) interactions. The SDW order arises from the repulsive Coulomb interaction of electrons, while the CDW order arises due to strong electron–phonon interaction giving rise to Fermi surface instability. We calculate phonon response function in order to examine the possibility of observing the SDW excitation mode in presence of the CDW interaction present in the same conduction band. The Raman scattering intensity is calculated from the imaginary part of the phonon Green’s function assigning an arbitrary spectral width. The spectral density function displays two mixed modes of excitation peaks at energies 2(Δ{sub c} ± Δ{sub s}). The evolution of excitation peaks are investigated by varying CDW coupling, SDW coupling and the phonon momentum transfer energy.}
doi = {10.1016/J.PHYSC.2013.05.024}
journal = []
volume = {492}
journal type = {AC}
place = {Netherlands}
year = {2013}
month = {Sep}
}
title = {Microscopic theoretical study of Raman spectra in charge and spin ordered cuprate systems}
author = {Raj, B. K., Panda, S. K., and Rout, G.C., E-mail: gcr@iopb.res.in}
abstractNote = {Highlights: • The model calculation treats CDW interaction as pseudogap for cuprates. • The interplay of Raman active CDW-SDW mixed modes are investigated. • Independent CDW and SDW gap values can be determined from experimental data. -- Abstract: Raman scattering is one of the most powerful methods to investigate the electron as well as the phonon excitations in the systems. In this communication, we present a theoretical study of Raman scattering in the normal state of the high-T{sub C} systems in the under-doped region displaying the interplay of the spin-density-wave (SDW) and charge-density-wave (CDW) interactions. The SDW order arises from the repulsive Coulomb interaction of electrons, while the CDW order arises due to strong electron–phonon interaction giving rise to Fermi surface instability. We calculate phonon response function in order to examine the possibility of observing the SDW excitation mode in presence of the CDW interaction present in the same conduction band. The Raman scattering intensity is calculated from the imaginary part of the phonon Green’s function assigning an arbitrary spectral width. The spectral density function displays two mixed modes of excitation peaks at energies 2(Δ{sub c} ± Δ{sub s}). The evolution of excitation peaks are investigated by varying CDW coupling, SDW coupling and the phonon momentum transfer energy.}
doi = {10.1016/J.PHYSC.2013.05.024}
journal = []
volume = {492}
journal type = {AC}
place = {Netherlands}
year = {2013}
month = {Sep}
}