Unconventional charge-density waves driven by electron-phonon coupling

2006 ◽  
Vol 73 (16) ◽  
Author(s):  
András Ványolos ◽  
Balázs Dóra ◽  
Attila Virosztek
Keyword(s):  
Charge Density ◽  
Charge Density Waves ◽  
Phonon Coupling ◽  
Density Waves ◽  
Electron Phonon Coupling

Effects of band structure and electron–phonon coupling on charge density waves

2013 ◽  
Vol 91 (6) ◽  
pp. 487-489 ◽  
Author(s):  
Jason W. Sadowski ◽  
K. Tanaka ◽  
Yuki Nagai
Keyword(s):  
Band Structure ◽  
Fermi Surface ◽  
Hubbard Model ◽  
Charge Density ◽  
Charge Density Waves ◽  
Phonon Coupling ◽  
Density Waves ◽  
Electron Phonon Coupling ◽  
Half Filling ◽  
Attractive Hubbard Model

We examine the effects of band structure and electron–phonon interactions on charge density waves (CDW) in terms of the extended attractive Hubbard model at half filling. It is shown that van Hove singularities well below the Fermi surface can lead to a substantial energy gain by electron–phonon coupling and result in the formation of CDW.

scholarly journals Quasiparticle Spectra, Charge-Density Waves, Superconductivity, and Electron-Phonon Coupling in2H−NbSe2

2004 ◽  
Vol 92 (8) ◽  
Author(s):  
T. Valla ◽  
A. V. Fedorov ◽  
P. D. Johnson ◽  
P-A. Glans ◽  
C. McGuinness ◽  
...  
Keyword(s):  
Charge Density ◽  
Charge Density Waves ◽  
Phonon Coupling ◽  
Density Waves ◽  
Electron Phonon Coupling

scholarly journals Classification of charge density waves based on their nature

2015 ◽  
Vol 112 (8) ◽  
pp. 2367-2371 ◽  
Author(s):  
Xuetao Zhu ◽  
Yanwei Cao ◽  
Jiandi Zhang ◽  
E. W. Plummer ◽  
Jiandong Guo
Keyword(s):  
Matrix Element ◽  
Charge Density ◽  
Density Wave ◽  
Charge Density Waves ◽  
Dimensional System ◽  
Momentum Dependence ◽  
Density Waves ◽  
Electronic Band ◽  
Electron Phonon Coupling ◽  
A Charge

The concept of a charge density wave (CDW) permeates much of condensed matter physics and chemistry. CDWs have their origin rooted in the instability of a one-dimensional system described by Peierls. The extension of this concept to reduced dimensional systems has led to the concept of Fermi surface nesting (FSN), which dictates the wave vector(q→CDW)of the CDW and the corresponding lattice distortion. The idea is that segments of the Fermi contours are connected byq→CDW, resulting in the effective screening of phonons inducing Kohn anomalies in their dispersion atq→CDW, driving a lattice restructuring at low temperatures. There is growing theoretical and experimental evidence that this picture fails in many real systems and in fact it is the momentum dependence of the electron–phonon coupling (EPC) matrix element that determines the characteristic of the CDW phase. Based on the published results for the prototypical CDW system 2H-NbSe2, we show how well theq→-dependent EPC matrix element, but not the FSN, can describe the origin of the CDW. We further demonstrate a procedure of combing electronic band and phonon measurements to extract the EPC matrix element, allowing the electronic states involved in the EPC to be identified. Thus, we show that a large EPC does not necessarily induce the CDW phase, with Bi2Sr2CaCu2O8+δas the example, and the charge-ordered phenomena observed in various cuprates are not driven by FSN or EPC. To experimentally resolve the microscopic picture of EPC will lead to a fundamental change in the way we think about, write about, and classify charge density waves.

Macroscopic quantum tunneling of charge density waves

1999 ◽  
Vol 09 (PR10) ◽  
pp. Pr10-161-Pr10-163
Author(s):  
H. Matsukawa ◽  
H. Miyake ◽  
M. Yumoto ◽  
H. Fukuyama
Keyword(s):  
Charge Density ◽  
Quantum Tunneling ◽  
Charge Density Waves ◽  
Density Waves ◽  
Macroscopic Quantum ◽  
Macroscopic Quantum Tunneling

Phase slip scaling relationship for the 59 K and 143 K charge-density-waves in NbSe3

1999 ◽  
Vol 09 (PR10) ◽  
pp. Pr10-129-Pr10-132 ◽  
Author(s):  
J. P. McCarten ◽  
T. C. Jones ◽  
X. Wu ◽  
J. H. Miller ◽  
I. Pirtle ◽  
...  
Keyword(s):  
Charge Density ◽  
Charge Density Waves ◽  
Phase Slip ◽  
Density Waves ◽  
Scaling Relationship

Transversely driven charge density waves in NbSe3

1999 ◽  
Vol 09 (PR10) ◽  
pp. Pr10-65-Pr10-67
Author(s):  
N. Markovic ◽  
M. A.H. Dohmen ◽  
H. S.J. van der Zant
Keyword(s):  
Charge Density ◽  
Charge Density Waves ◽  
Density Waves

scholarly journals Chiral charge density waves induced by Ti-doping in 1T-TaS2

2021 ◽  
Vol 118 (21) ◽  
pp. 213105
Author(s):  
J. J. Gao ◽  
W. H. Zhang ◽  
J. G. Si ◽  
X. Luo ◽  
J. Yan ◽  
...  
Keyword(s):  
Charge Density ◽  
Charge Density Waves ◽  
Density Waves ◽  
Ti Doping

Nonlinear Conductivity Due to Field-Induced Depinning of Charge-Density Waves in NbSe3

1987 ◽  
Vol 56 (7) ◽  
pp. 2503-2510 ◽  
Author(s):  
Masayuki Ido ◽  
Yoshitoshi Okajima ◽  
Hirotsugu Wakimoto ◽  
Migaku Oda
Keyword(s):  
Charge Density ◽  
Charge Density Waves ◽  
Density Waves ◽  
Nonlinear Conductivity
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