Observation of breather excitons and soliton in a substituted polythiophene with a degenerate ground state

2010 ◽  
Vol 81 (7) ◽  
Author(s):  
Takayoshi Kobayashi ◽  
Juan Du ◽  
Wei Feng ◽  
Katsumi Yoshino ◽  
Sergei Tretiak ◽  
...  
Keyword(s):  
Ground State ◽  
Degenerate Ground State

A Potts model with infinitely degenerate ground state

1981 ◽  
Vol 14 (10) ◽  
pp. L399-L404 ◽  
Author(s):  
W Kinzel ◽  
W Selke ◽  
F Y Wu
Keyword(s):  
Potts Model ◽  
Ground State ◽  
Degenerate Ground State

Pseudorotation as a possible origin of fast paramagnetic relaxation in radical ions with a degenerate or quasi-degenerate ground state

2009 ◽  
Vol 426 (2) ◽  
pp. 108-112 ◽  
Author(s):  
V. I. Borovkov ◽  
I. V. Beregovaya ◽  
L. N. Shchegoleva ◽  
V. A. Bagryanskii ◽  
Yu. N. Molin
Keyword(s):  
Ground State ◽  
Paramagnetic Relaxation ◽  
Radical Ions ◽  
Degenerate Ground State

EXACT GROUND STATES OF ONE-DIMENSIONAL VALENCE-BOND-SOLID HAMILTONIANS

1987 ◽  
Vol 01 (05n06) ◽  
pp. 231-237 ◽  
Author(s):  
P.L. Iske ◽  
W.J. Caspers
Keyword(s):  
Ground State ◽  
Valence Bond ◽  
Ground States ◽  
Open Chain ◽  
State Correlation ◽  
One Dimensional ◽  
Degenerate Ground State ◽  
Closed Chain ◽  
Ground State Correlation ◽  
Valence Bond Solid

The ground state(s) of a Hamiltonian, introduced by Affleck, Kennedy, Lieb and Tasaki, in connection with the Valence-Bond-Solid (VBS) states, are explicitly given for the spin-1 chains. The structure of these ground states is a rather simple one. For a closed chain we find a unique ground state; for the open chain we find a fourfold-degenerate ground state. The ground state correlation function for the ring is calculated.

Magnetic dipole interactions in dysprosium ethyl sulphate - I. Susceptibility and specific heat between 20 and 1°K

1959 ◽  
Vol 252 (1269) ◽  
pp. 246-259 ◽  
Keyword(s):  
Specific Heat ◽  
Magnetic Dipole ◽  
Ground State ◽  
Optical Rotation ◽  
Dipole Interaction ◽  
Crystal Axis ◽  
Dipole Interactions ◽  
Degenerate Ground State ◽  
Magnetic Ions ◽  
Good Agreement

Measurements have been made of the magnetic susceptibility and the magnetic contributions to the specific heat of dysprosium ethyl sulphate, at temperatures between 20 and 1°K. It is shown that below about 3°K these properties, and also the earlier optical rotation measure­ments of Becquerel et al ., can be accounted for satisfactorily in terms of a doubly degenerate ground state of the magnetic ions, with spectroscopic splitting factors parallel and perpen­dicular to the crystal axis g 1 = 10.8 and g ┴ = 0, together with an unusually strong coupling between the ions arising from magnetic dipole-dipole interaction. The effect of other inter­actions is shown to be small. Because of this, and the extreme anisotropy of the g -tensor, the properties of this substance at very low temperatures (~ 0.1°K) should closely resemble those of a classical Ising model with known, dipolar forces between the ions. At temperatures above 3°K other states of the ions become populated and it is shown that the first of these lies at an energy of (23 ± 3) k , in good agreement with other experiments.

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