scholarly journals Low-energy excitations in a one-dimensional orthogonal dimer model with the Dzyaloshinski-Moriya interaction

2005 ◽  
Vol 66 (8-9) ◽  
pp. 1458-1461 ◽  
Author(s):  
Kenji Sasaoka ◽  
Chikara Ishii
Keyword(s):  
Low Energy ◽  
Dimer Model ◽  
One Dimensional ◽  
Moriya Interaction

scholarly journals Extended states in a one-dimensional generalized dimer model

2002 ◽  
Vol 65 (23) ◽  
Author(s):  
P. Ojeda ◽  
R. Huerta-Quintanilla ◽  
M. Rodríguez-Achach
Keyword(s):  
Dimer Model ◽  
One Dimensional ◽  
Extended States

scholarly journals Dynamical Charge Structure Factor of a One-Dimensional Ionic Hubbard Model in the Low-Energy Region

2019 ◽  
Vol 88 (5) ◽  
pp. 054709
Author(s):  
Yuhei Komaki ◽  
Yuma Iwase ◽  
Shogo Yanagimatsu ◽  
Yoshiyuki Muta ◽  
Nobuya Maeshima ◽  
...  
Keyword(s):  
Hubbard Model ◽  
Structure Factor ◽  
Energy Region ◽  
Low Energy ◽  
Charge Structure ◽  
One Dimensional ◽  
Ionic Hubbard Model ◽  
Dynamical Charge

scholarly journals Low-energy quasi-one-dimensional spin dynamics in charge-ordered La2−xSrxNiO4

2011 ◽  
Vol 83 (9) ◽  
Author(s):  
P. G. Freeman ◽  
D. Prabhakaran ◽  
K. Nakajima ◽  
A. Stunault ◽  
M. Enderle ◽  
...  
Keyword(s):  
Spin Dynamics ◽  
Low Energy ◽  
One Dimensional

scholarly journals TRIONIC AND QUARTETTING PHASES IN ONE-DIMENSIONAL MULTICOMPONENT ULTRACOLD FERMIONS

2008 ◽  
Vol 17 (10) ◽  
pp. 2110-2117 ◽  
Author(s):  
P. LECHEMINANT ◽  
P. AZARIA ◽  
E. BOULAT ◽  
S. CAPPONI ◽  
G. ROUX ◽  
...  
Keyword(s):  
Optical Lattice ◽  
Nuclear Physics ◽  
Bound States ◽  
Cold Atoms ◽  
Low Energy ◽  
Low Density ◽  
Large Domain ◽  
One Dimensional ◽  
Fermionic Systems ◽  
Numerical Approaches

We investigate the possible formation of a molecular condensate, which might be, for instance, the analogue of the alpha condensate of nuclear physics, in the context of multicomponent cold atoms fermionic systems. A simple paradigmatic model of N-component fermions with contact interactions loaded into a one-dimensional optical lattice is studied by means of low-energy and numerical approaches. For attractive interaction, a quasi-long-range molecular superfluid phase, formed from bound-states made of N fermions, emerges at low density. We show that trionic and quartetting phases, respectively for N = 3,4, extend in a large domain of the phase diagram and are robust against small symmetry-breaking perturbations.

The electronic structure and spin-charge separation of one-dimensional SrCuO2

2019 ◽  
Vol 33 (02) ◽  
pp. 1950006
Author(s):  
Huaisong Zhao ◽  
Jiasheng Qian ◽  
Sheng Xu ◽  
Feng Yuan
Keyword(s):  
Electronic Structure ◽  
Charge Separation ◽  
Energy Region ◽  
Doping Concentration ◽  
High Energy ◽  
Intermediate Energy ◽  
Low Energy ◽  
One Dimensional ◽  
High Energy Peak ◽  
Energy Peak

Based on the t-J model and slave-boson theory, we have studied the electronic structure in one-dimensional SrCuO2 by calculating the electron spectrum. Our results show that the electron spectra are mainly composed of three parts in one-dimensional SrCuO2, a sharp low-energy peak, a broad intermediate-energy peak and a high-energy peak. The sharp low-energy peak corresponds to the main band (MB) while the broad intermediate-energy peak and high-energy peak are associated with the shadow band (SB) and high-energy band (HB), respectively. From low-energy to intermediate-energy region, a clear two-peak structure (MB and SB) around the momentum [Formula: see text] appears, and the distance between two peaks decreases along the momentum direction from [Formula: see text] to [Formula: see text], then disappears at the critical momentum point [Formula: see text], leaving a single peak above [Formula: see text]. The electron spectral function in one-dimensional SrCuO2 is also the doping and temperature dependent. In particular, in the very low doping concentration, the HB merges into the MB. However, with the increases of the doping concentration, the HB separates from the MB and moves quickly to the high-binding energy region. The HB and MB are the direct results of the spin-charge separation while SB is the result of strong interaction between charge and spin parts. Therefore, our theoretical result predicts that the HB is more likely to be found at the low doping concentration, and it will be drowned in the background when the doping concentration is larger. Then with the temperature increases, the magnitude of the SB decreases, and it disappears at high temperature.

Diffusion in High Occupancy Zeolites

1987 ◽  
Vol 111 ◽  
Author(s):  
James Wei
Keyword(s):  
Activation Energy ◽  
Random Walk ◽  
Small Molecules ◽  
Irreversible Thermodynamics ◽  
Low Energy ◽  
The Other ◽  
Diffusion Region ◽  
Channel Diameter ◽  
One Dimensional ◽  
Activation Energy Of Diffusion

AbstractDiffusion of small molecules in zeolites most often takes place in the configurational diffusion region, where the molecular diameter is approximately the same or slightly greater than the channel diameter. Since two molecules may not pass each other in a pore, the random walk based diffusion equation does not apply under high occupancy conditions in zeolites with one-dimensional pores.For zeolites with multi-dimensional pores, such as ZSM-5 and A, one sometimes encounters the counter-intuitive result that diffusivity dramatically rises with occupancy. There are two explanations for this behavior: one from irreversible thermodynamics and the Darken equation, which predicts that diffusivity will always rise with occupancy; the other from a Markov model of random activated jumps between low energy positions, such as pore crossings, which predicts that diffusivity will increase with occupancy if the activation energy of diffusion decreases with occupancy– such as due to swelling.

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