Jahn-Teller Effect and Partially Covalent Bond as Causes of Low Symmetry of Ga+, In+, and Tl+ Centres in CsCl-Type Alkali Halides

1970 ◽  
Vol 38 (1) ◽  
pp. 119-129 ◽  
Author(s):  
S. G. Zazubovich
Keyword(s):  
Covalent Bond ◽  
Alkali Halides ◽  
Teller Effect ◽  
Cscl Type ◽  
Jahn Teller ◽  
Jahn Teller Effect ◽  
Low Symmetry

Local structure and excitations in systems with CuF64− units: lack of Jahn–Teller effect in the low symmetry compound Na2CuF4

2020 ◽  
Vol 22 (15) ◽  
pp. 7875-7887
Author(s):  
I. Sanchez-Movellan ◽  
J. A. Aramburu ◽  
M. Moreno
Keyword(s):  
Local Structure ◽  
Teller Effect ◽  
Jahn Teller ◽  
Jahn Teller Effect ◽  
Low Symmetry

The lack of a Jahn–Teller effect in Na2CuF4 is illustrated by the anisotropy of the Na2ZnF4 parent lattice.

DFT Analysis of the Indium-Antimony-Vacancy Cluster in Silicon

2005 ◽  
Vol 245-246 ◽  
pp. 29-38 ◽  
Author(s):  
M.M. De Souza ◽  
Jonathan P. Goss
Keyword(s):  
High Temperature ◽  
Binding Energy ◽  
Vacancy Cluster ◽  
Antimony Atom ◽  
Teller Effect ◽  
High Temperature Anneal ◽  
Jahn Teller ◽  
Jahn Teller Effect ◽  
Low Symmetry ◽  
Strong Binding Energy

A cluster comprising of indium, antimony and a vacancy in silicon is analysed using the planewave pseudopotential technique. This cluster has a strong binding energy that inhibits indium diffusion after high temperature anneal cycles. Difficulties associated with the simulation of a vacancy using the supercell approach are initially highlighted. In comparison, the indium-antimony-vacancy cluster reveals stronger distortions and reduction in relaxation volume. The indium atom in the relaxed cluster shows nearly six-fold coordination whereas the antimony atom acquires four neighbours. Due to the low symmetry of the centre, in constrast to the isolated vacancy there is no propensity for a Jahn-Teller effect. It gives rise to two defect levels in the bandgap.

Dynamical Jahn-Teller effect in Pb2+ doped alkali halides

1987 ◽  
Vol 64 (6) ◽  
pp. 971-974 ◽  
Author(s):  
F. Cussó ◽  
F. Jaque ◽  
P. Aceituno
Keyword(s):  
Alkali Halides ◽  
Teller Effect ◽  
Jahn Teller ◽  
Jahn Teller Effect

Optical Absorption Spectra of the A Band in KBr:Pb2+ Crystals

1975 ◽  
Vol 53 (2) ◽  
pp. 200-201 ◽  
Author(s):  
Taiju Tsuboi ◽  
Robert E. Chaney ◽  
P. W. M. Jacobs
Keyword(s):  
Optical Absorption ◽  
Absorption Spectra ◽  
High Temperatures ◽  
Line Shape ◽  
Low Temperatures ◽  
Alkali Halides ◽  
Teller Effect ◽  
Optical Absorption Spectra ◽  
Jahn Teller ◽  
Jahn Teller Effect

The shape of the A band in KBr:Pb2+ has been studied at various temperatures between 13 and 296 K. The band is almost symmetric at low temperatures but slightly asymmetric at high temperatures. The observed line shape of the A band in KBr:Pb2+ is discussed in terms of the Jahn–Teller effect and is compared with that of the A band in In+ and Tl+ doped alkali halides.

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