scholarly journals Emergence of a Sharp Quantum Collective Mode in a One-Dimensional Fermi Polaron

2021 ◽  
Vol 11 (4) ◽  
Author(s):  
Pavel E. Dolgirev ◽  
Yi-Fan Qu ◽  
Mikhail B. Zvonarev ◽  
Tao Shi ◽  
Eugene Demler
Keyword(s):  
Collective Mode ◽  
One Dimensional ◽  
Fermi Polaron

Collective mode dispersions of organic chain compounds

Open Physics ◽  
2010 ◽  
Vol 8 (3) ◽  
Author(s):  
Željana Lošić ◽  
Paško Županović
Keyword(s):  
Collective Mode ◽  
Random Phase ◽  
Tight Binding ◽  
Three Dimensional ◽  
Plasmon Mode ◽  
Optical Data ◽  
Electron Interaction ◽  
Coulomb Interactions ◽  
One Dimensional ◽  
Donor And Acceptor

AbstractWe investigate the collective mode dispersions for the tight-binding dielectric matrix with two one-dimensional electron bands per donor and acceptor chains, and the three-dimensional long-range Coulomb electron-electron interaction within the random phase approximation. The hybridized collective modes are the result of the strong coupling between the intraband plasmon and the interband dipolar modes due to strong dipole Coulomb interactions. Our calculations show the existence of the low-energy renormalized plasmon mode above the electron-hole quasi-continuum in the long wavelength limit. The obtained modes are brought into correspondence with the optical data of quasi-one-dimensional organic conductor tetrathiafulvalene-tetracyanoquinodimethane (TTF-TCNQ). Namely, the renormalized plasmon and the dipolar mode are assigned to the observed excitations at respective energy scales of roughly 10 meV and 0.75 eV, explaining why lower excitation is eliminated while higher excitation persists below the temperature of the Peierls phase transition.

Structure of a Pt(II)-Pt(IY) Mixed-Valence Linear Chain Complex: Bis (1,2-diaminopropane )platinum(II)bis (1,2-diaminepropane ) - dibromoplatinum(IV)tetraperchlorate

1983 ◽  
Vol 38 (11) ◽  
pp. 1346-1350 ◽  
Author(s):  
M. Cannas ◽  
G. Marongiu ◽  
R. Martin ◽  
H. J. Keller
Keyword(s):  
Structural Analysis ◽  
Collective Mode ◽  
Linear Chain ◽  
Mixed Valence ◽  
Chain Complex ◽  
Final Decision ◽  
One Dimensional ◽  
Space Groups ◽  
Cell Dimensions ◽  
Difference Fourier

[Pt(C3H10N2)2][Pt(C3H10N2)2Br2](ClO4)4 crystallizes as flat orthorhombic needles with cell dimensions: a = 7.74(1); b = 11.14(2); c = 19.42(3) Å, Z = 1. Since rotation photo­graphs showed diffuse patterns corresponding to odd values of k without any Bragg reflections, the subcell for which b = 5.57(1) Å was adopted for the structural analysis; it has systematic absences consistent with space groups Pc 2 a and Pcma; the structure was refined in both space groups by least squares and difference Fourier syntheses to R = 0.062 in Pc 2a and R = 0.064 in Pcma. A final decision between the two space groups proved to be impossible within the scope of the experiment. An analysis of the “diffuse” layers reveals that the bridging bromines vibrate in a one-dimensional collective mode within a lattice of “uniform”, fixed platinum cations.

scholarly journals Fermi-polaron-like effects in a one-dimensional (1D) optical lattice

2010 ◽  
Vol 12 (7) ◽  
pp. 073044 ◽  
Author(s):  
M J Leskinen ◽  
O H T Nummi ◽  
F Massel ◽  
P Törmä
Keyword(s):  
Optical Lattice ◽  
One Dimensional ◽  
Fermi Polaron

scholarly journals Electrodynamics of Bechgaard Salts: Optical Properties of One-Dimensional Metals

2012 ◽  
Vol 2012 ◽  
pp. 1-21 ◽  
Author(s):  
Martin Dressel
Keyword(s):  
Collective Mode ◽  
Density Wave ◽  
Spin Density Wave ◽  
Low Frequency ◽  
Current Status ◽  
Excitation Spectra ◽  
Bechgaard Salts ◽  
One Dimensional ◽  
Open Questions ◽  
Liquid Behavior

The electrodynamic properties of the quasi-one-dimensional organic conductors (TMTSF)2X are discussed, with particular emphasis on important deviations from the simple Drude model, the transition from a Luttinger-liquid to a Fermi-liquid behavior at the dimensional crossover when pressure is applied or temperature reduced, indications of a pseudogap as well as a low-frequency collective mode. Superconductivity and spin-density-wave ground states breaking the symmetry and gaps should occur in the excitation spectra. The previous literature is summarized and the current status of our understanding presented. Novel THz experiments on (TMTSF)2PF6 and (TMTSF)2ClO4 not only shine light into some of the open questions, but also pose new ones.

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