Local Jahn-Teller Effect at a Structural Phase Transition

1977 ◽  
pp. 184-188 ◽  
Author(s):  
K.-H. Höck ◽  
H. Thomas
Keyword(s):  
Phase Transition ◽  
Structural Phase Transition ◽  
Structural Phase ◽  
Teller Effect ◽  
Jahn Teller ◽  
Jahn Teller Effect

Cooperative Pseudo Jahn-Teller Effect as Microscopic Mechanism of (OMT)-(LTT) Structural Phase Transition in La2−xBaxCuO4Superconductors

1992 ◽  
Vol 291 ◽  
Author(s):  
Michael D. Kaplan
Keyword(s):  
Phase Transition ◽  
Structural Phase Transition ◽  
Structural Phase ◽  
Electronic States ◽  
Teller Effect ◽  
Excited Electronic States ◽  
Microscopic Mechanism ◽  
Jahn Teller ◽  
Jahn Teller Effect ◽  
Local Distortions

ABSTRACTA microscopic mechanism for the structural phase transition from the orthorhombic mediate temperature (OMT) phase into the low temperature tetragonal (LTT) one is suggested on the basis of the cooperative pseudo Jahn-Teller effect. The local distortions mixing the ground and the first excited electronic states are ordered antiferrodistortively and are connected in part, with the oxygen octahedra rotations around the [100] axis. The results are in agreement, with the neutron scattering experiments data.

Magnetic and FMR Investigation of the Structural Phase Transition in Cu-Ferrite with Cooperative Jahn-Teller Effect

1982 ◽  
Vol 73 (2) ◽  
pp. K243-K247 ◽  
Author(s):  
I. Onyszkiewicz ◽  
N. T. Malafaev ◽  
A. A. Murakhovskii ◽  
J. Pietrzak
Keyword(s):  
Phase Transition ◽  
Structural Phase Transition ◽  
Structural Phase ◽  
Teller Effect ◽  
Jahn Teller ◽  
Jahn Teller Effect

Distortion Characteristics Across the Structural Phase Transition in (Cu1−x Zn x )WO4

1997 ◽  
Vol 53 (1) ◽  
pp. 102-112 ◽  
Author(s):  
P. F. Schofield ◽  
K. S. Knight ◽  
S. A. T. Redfern ◽  
G. Cressey
Keyword(s):  
Phase Transition ◽  
Solid Solution ◽  
Structural Phase Transition ◽  
Order Parameter ◽  
Structural Phase ◽  
Rietveld Analysis ◽  
Neutron Powder Diffraction Data ◽  
Jahn Teller ◽  
Jahn Teller Effect ◽  
Homogeneous Strain

Rietveld analysis of neutron powder diffraction data on the sanmartinite (ZnWO4)-cuproscheelite (CuWO4) solid solution has enabled the comparison of microscopic and macroscopic order parameters associated with the P2/c–P\overline 1 structural phase transition. The macroscopic spontaneous strain, calculated from the lattice parameters, conforms well with a second-order Landau model. Furthermore, this is also true of the symmetry-related atomistic M—O order parameter and the quadratic elongation of the MO6 octahedra. It is clear that the Jahn–Teller effect, associated with the divalent Cu cation, is the driving force for the phase transition and the excess elongation evident in the M—O(2) bond giving rise to the non-symmetry predicted strain element e 22. The existence of a large region of order parameter saturation at the copper-rich end of the solid solution is also associated with the MO6 elongation and the breakdown of the homogeneous strain field of the zinc solute atoms.

scholarly journals Simulation of the Jahn–Teller–Dicke magnetic structural phase transition with trapped ions

2013 ◽  
Vol 46 (10) ◽  
pp. 104003 ◽  
Author(s):  
Peter A Ivanov ◽  
Diego Porras ◽  
Svetoslav S Ivanov ◽  
Ferdinand Schmidt-Kaler
Keyword(s):  
Phase Transition ◽  
Structural Phase Transition ◽  
Structural Phase ◽  
Trapped Ions ◽  
Jahn Teller

Direct observation of a band Jahn-Teller effect in the martensitic phase transition of Ni2MnGa

1999 ◽  
Vol 11 (24) ◽  
pp. 4715-4722 ◽  
Author(s):  
P J Brown ◽  
A Y Bargawi ◽  
J Crangle ◽  
K-U Neumann ◽  
K R A Ziebeck
Keyword(s):  
Phase Transition ◽  
Direct Observation ◽  
Martensitic Phase ◽  
Teller Effect ◽  
Martensitic Phase Transition ◽  
Jahn Teller ◽  
Jahn Teller Effect
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