Magnetic excitations and soft-mode transition in the quasi-one-dimensional mixed-spin antiferromagnetPr2BaNiO5

1996 ◽  
Vol 54 (9) ◽  
pp. 6437-6447 ◽  
Author(s):  
A. Zheludev ◽  
J. M. Tranquada ◽  
T. Vogt ◽  
D. J. Buttrey
Keyword(s):  
Soft Mode ◽  
Mode Transition ◽  
Magnetic Excitations ◽  
One Dimensional ◽  
Mixed Spin

Magnetic excitations and soft-mode transition in Pr 2 BaNiO 5

1996 ◽  
Vol 35 (5) ◽  
pp. 385-390 ◽  
Author(s):  
A Zheludev ◽  
J. M Tranquada ◽  
T Vogt ◽  
D. J Buttrey
Keyword(s):  
Soft Mode ◽  
Mode Transition ◽  
Magnetic Excitations

Neutron Scattering Study of Magnetic Excitations in a One-Dimensional Heisenberg Antiferromagnet CsVCl3

1986 ◽  
Vol 55 (8) ◽  
pp. 2846-2852 ◽  
Author(s):  
Hiroaki Kadowaki ◽  
Koji Ubukoshi ◽  
Kinshiro Hirakawa ◽  
David P. Belanger ◽  
Hideki Yoshizawa ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Heisenberg Antiferromagnet ◽  
Magnetic Excitations ◽  
One Dimensional ◽  
Scattering Study ◽  
Neutron Scattering Study

scholarly journals FERROELECTRIC LIQUID CRYSTALS: FROM THE PLANE WAVE TO THE MULTISOLITON LIMIT

1995 ◽  
Vol 09 (18n19) ◽  
pp. 2321-2362 ◽  
Author(s):  
I. MUŠEVIČ ◽  
B. ŽEKŠ ◽  
R. BLINC ◽  
TH. RASING
Keyword(s):  
Plane Wave ◽  
Domain Walls ◽  
Soft Mode ◽  
Dynamic Properties ◽  
Band Gaps ◽  
Collective Excitations ◽  
Ferroelectric Liquid Crystals ◽  
One Dimensional ◽  
Photonic Band ◽  
Reentrant Phases

In the presence of external fields or in restricted geometries, the originally continuous helical symmetry of the Sm C* phase is broken by the appearence of field- or geometry-induced soliton-like domain walls. As a result of this symmetry breaking, a crossover between the plane-wave-like and soliton-like regime occurs in both static and dynamic properties which is responsible for some remarkable phenomena such as field-induced optical biaxiality or a field-induced band structure of collective excitations. Whereas we find in the plane-wave-like regime a degenerate soft mode which splits below the Sm A→Sm C* transition into a symmetry recovering Goldstone-phason-mode and an amplitudon mode, we find in the soliton regime a splitting of the phason mode into acoustic and optic-like branches separated by a band gap. Within the same framework we also discuss other remarkable and extraordinary properties such as reentrant phases, Lifshitz points, one dimensional photonic band gaps and thickness dependent phase diagrams.

Role of single-ion excitations in the mixed-spin quasi-one-dimensional quantum antiferromagnetNd2BaNiO5

2000 ◽  
Vol 61 (17) ◽  
pp. 11601-11612 ◽  
Author(s):  
A. Zheludev ◽  
S. Maslov ◽  
T. Yokoo ◽  
J. Akimitsu ◽  
S. Raymond ◽  
...  
Keyword(s):  
One Dimensional ◽  
Mixed Spin
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