Radical ions with nearly degenerate ground state: Correlation between the rate of spin-lattice relaxation and the structure of adiabatic potential energy surface

2012 ◽  
Vol 137 (10) ◽  
pp. 104305 ◽  
Author(s):  
V. I. Borovkov ◽  
I. V. Beregovaya ◽  
L. N. Shchegoleva ◽  
P. A. Potashov ◽  
V. A. Bagryansky ◽  
...  
Keyword(s):  
Ground State ◽  
Energy Surface ◽  
Lattice Relaxation ◽  
Spin Lattice Relaxation ◽  
Radical Ions ◽  
State Correlation ◽  
Spin Lattice ◽  
Degenerate Ground State ◽  
Ground State Correlation ◽  
Adiabatic Potential Energy Surface

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.

Proton and Fluorine Spin-Lattice Relaxation in Polycrystalline CoSiF6 · 6 H20

1984 ◽  
Vol 39 (1) ◽  
pp. 111-112 ◽  
Author(s):  
H. Rager
Keyword(s):  
Phase Transition ◽  
Ground State ◽  
Relaxation Times ◽  
Lattice Relaxation ◽  
Relaxation Mechanism ◽  
Spin Lattice Relaxation ◽  
Spin Orbital ◽  
Spin Lattice ◽  
Main Relaxation ◽  
Spin Orbital Coupling

The spin-lattice relaxation times T1 (1H) and T1 (19F) in CoSiF6 · 6H20 have been measured at 30 MHz in the temperature range 150 K ≦ F ≦ 400 K Both T1 (1H) and T1 (19F) decrease sharply at the phase transition temperature of 246 K (cooling cycle). The main relaxation mechanism is assumed to be an Orbach process. From the T1 data an average splitting of the Co2+ ground state of about 400 cm-1 in both phases is obtained. The splitting is mainly caused by spin orbital coupling.

Ground State and Spin–Lattice Relaxation of Ce3+ Ions in Lanthan Ethyl Sulphate

1981 ◽  
Vol 104 (1) ◽  
pp. K21-K25 ◽  
Author(s):  
I. M. Krigin ◽  
S. N. Lukin ◽  
G. N. Neilo ◽  
A. D. Prokhorov
Keyword(s):  
Ground State ◽  
Lattice Relaxation ◽  
Spin Lattice Relaxation ◽  
Spin Lattice
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