Fermi Surface and Charge Density Waves in Second-Stage Graphite-Bromine Intercalation Compounds

1982 ◽  
Vol 20 ◽  
Author(s):  
F. Batallan ◽  
I. Rosenman ◽  
Ch. Simon ◽  
G. Furdin
Keyword(s):  
Fermi Surface ◽  
Charge Density ◽  
Intercalation Compound ◽  
Charge Density Waves ◽  
Effect Study ◽  
Two Dimensional ◽  
Density Waves ◽  
Second Stage ◽  
Compound C ◽  
Graphite Intercalation

ABSTRACTResults of de Haas van Alphen effect study on second-stage bromine graphite intercalation compound C14 Br are presented together with a two dimensional model of electronic structure and Fermi surface. The results are characterized by a mixing of de Haas-van Alphen frequencies. The nature of the coupling mechanisms between orbits is discussed. It is shown that the two dimensional Fermi surface of C14 Br contains nested parallel parts which can stabilize charge density waves. A comparison between the nesting vectors of this Fermi surface and the satellites and diffuse streaks found in structural studies shows a fair agreement between both.

scholarly journals Recovery of long-range order in two-dimensional charge density waves at high temperatures

2021 ◽  
Vol 27 (S1) ◽  
pp. 952-954
Author(s):  
Suk Hyun Sung ◽  
Yin Min Goh ◽  
Noah Schnitzer ◽  
Ismail El Baggari ◽  
Kai Sun ◽  
...  
Keyword(s):  
Charge Density ◽  
Long Range ◽  
High Temperatures ◽  
Charge Density Waves ◽  
Range Order ◽  
Long Range Order ◽  
Two Dimensional ◽  
Density Waves

scholarly journals Monolayer VTe2 : Incommensurate Fermi surface nesting and suppression of charge density waves

2019 ◽  
Vol 99 (24) ◽  
Author(s):  
Katsuaki Sugawara ◽  
Yuki Nakata ◽  
Kazuki Fujii ◽  
Kosuke Nakayama ◽  
Seigo Souma ◽  
...  
Keyword(s):  
Fermi Surface ◽  
Charge Density ◽  
Charge Density Waves ◽  
Density Waves ◽  
Fermi Surface Nesting

NONSTATIONARY JOSEPHSON EFFECT AND QUASIPARTICLE TUNNELING BETWEEN PARTIALLY-DIELECTRIZED SUPERCONDUCTORS WITH CHARGE-DENSITY WAVES

1993 ◽  
Vol 07 (22) ◽  
pp. 3927-3935 ◽  
Author(s):  
A.M. GABOVICH
Keyword(s):  
Experimental Data ◽  
Fermi Surface ◽  
Charge Density ◽  
Excitation Spectrum ◽  
Josephson Effect ◽  
Tunnel Junctions ◽  
Charge Density Waves ◽  
Density Waves ◽  
Quasiparticle Tunneling ◽  
Current Voltage

The tunnel junctions between superconductors where the Fermi surface (FS) is partially dielectrized are considered. The dielectrization due to Coulomb- and (or) electron-phonon interactions leads to the emergence of the dielectric gap Σ on nested FS sections and the existence of the charge-density waves below temperature T=T d . When T<T c <T d the partially-dielectrized metals become superconductors with a corresponding gap ∆. The voltage dependences of the nonstationary Josephson current and quasiparticle current are calculated for such junctions. The current-voltage (I–V) characteristics involve several Riedel-type singularities and jumps for voltages equal to definite combinations of gaps ∆ and Σ in the fermion excitation spectrum. So, I–V curves are much more complex than the ones for usual BCS-type superconductors. The results for quasiparticle tunneling agree with the experimental data available for oxides.

scholarly journals Two-dimensional chiral stacking orders in quasi-one-dimensional charge density waves

2020 ◽  
Vol 102 (12) ◽  
Author(s):  
Sun-Woo Kim ◽  
Hyun-Jung Kim ◽  
Sangmo Cheon ◽  
Tae-Hwan Kim
Keyword(s):  
Charge Density ◽  
Charge Density Waves ◽  
Two Dimensional ◽  
Density Waves ◽  
One Dimensional

Phonon Spectrum of Second Stage Graphite-Bromine Intercalation Compounds

1982 ◽  
Vol 20 ◽  
Author(s):  
Ch. Simon ◽  
F. Batallan ◽  
I. Rosenman ◽  
H. Lauter
Keyword(s):  
Phonon Spectrum ◽  
Axial Symmetry ◽  
Basal Plane ◽  
Inelastic Neutron Scattering ◽  
Intercalation Compound ◽  
Inelastic Neutron ◽  
Graphite Intercalation Compound ◽  
Second Stage ◽  
Compound C ◽  
Graphite Intercalation

ABSTRACTCoherent inelastic neutron scattering results on the second-stage graphite intercalation compound C8Br are presented. Phonons polarized along the c-axis and in the basal plane were observed. A phenomenological Born-von Kármán force constant model with non-axial symmetry is used with parameters adjusted in agreement with the results. Several specific points of the phonon spectrum which are outside of the limits of the model are discussed.

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