Symmetry-Adaptation and Selection Rules for Effective Crystal Field Hamiltonians

1986 ◽  
pp. 493-502
Author(s):  
J. A. Tuszyński
Keyword(s):  
Crystal Field ◽  
Selection Rules ◽  
Symmetry Adaptation

New Developments in Raman Spectroscopy with Lasers: Electronic Transitions

1968 ◽  
Vol 22 (5) ◽  
pp. 438-444 ◽  
Author(s):  
J. A. Koningstein
Keyword(s):  
Raman Spectroscopy ◽  
Single Crystals ◽  
Crystal Field ◽  
Raman Spectra ◽  
Raman Effect ◽  
Electronic Transitions ◽  
New Developments ◽  
Selection Rules ◽  
Phonon Spectra ◽  
Host Lattices

A discussion is given of the Raman spectra of single crystals of yttrium gallium garnet (YGaG), of ytterbrium gallium garnet (YbGaG), and of Yb:YGaG. From a comparison of the spectra it has been possible to separate the phonon spectra of the host lattices from that of an electronic Raman effect which occurs between the crystal field levels of the 2F7/2 manifold of Yb3+ in the garnet crystals. Information with respect to the selection rules governing both types of spectra is given.

Racah algebra of two-body double-tensor operators

1985 ◽  
Vol 63 (9) ◽  
pp. 1220-1227 ◽  
Author(s):  
J. A. Tuszyński ◽  
R. Chatterjee ◽  
J. M. Dixon
Keyword(s):  
Crystal Field ◽  
Time Reversal ◽  
Numerical Evaluation ◽  
Charge Conjugation ◽  
Matrix Elements ◽  
Irreducible Tensor ◽  
Selection Rules ◽  
Definition Of ◽  
Racah Algebra ◽  
Tensor Operators

Two-body double-tensor (TBDT) operators are introduced in the LS- and jj-coupling schemes following Racah's definition of irreducible tensor operators. These operators are shown to contain well-known one-body double tensors as a subset. The result of applying parity, charge conjugation, and time reversal to the TBDT operators is investigated so as to obtain selection rules for their matrix elements. On the basis of their rotation properties, these Hermitian tensor operators are shown to satisfy an SU(2) algebra, and consequently the Wigner–Eckart theorem is applied to calculate their matrix elements. The derivation of the reduced matrix elements is provided. We show some examples of interactions investigated in the literature that can be represented as TBDT operators. For one such operator, the spin-correlated crystal field, a detailed numerical evaluation of its matrix elements is given.

LOW SYMMETRY CRYSTAL FIELD IN LITHIUM SPINEL

1971 ◽  
Vol 32 (C1) ◽  
pp. C1-847-C1-849
Author(s):  
M. P. PIETROV ◽  
H. SZYMCZAK ◽  
R. WADAS ◽  
W. WARDZYNSKI
Keyword(s):  
Crystal Field ◽  
Low Symmetry

Determination of exchange and crystal field effects in Sm alloys by polarized neutron diffraction

1979 ◽  
Vol 40 (C5) ◽  
pp. C5-180-C5-182 ◽  
Author(s):  
J. X. Boucherle ◽  
D. Givord ◽  
J. Laforest ◽  
J. Schweizer ◽  
F. Tasset
Keyword(s):  
Neutron Diffraction ◽  
Crystal Field ◽  
Field Effects ◽  
Polarized Neutron

MAGNETISM AND CRYSTAL FIELD IN TmCu2

1988 ◽  
Vol 49 (C8) ◽  
pp. C8-415-C8-416 ◽  
Author(s):  
V. Šima ◽  
Z. Smetana ◽  
M. Diviš ◽  
P. Svoboda ◽  
Š. Zajac ◽  
...  
Keyword(s):  
Crystal Field

CRYSTAL-FIELD DEPENDENCE OF THE MAGNETIC LINEAR BIREFRINGENCE IN PARAMAGNETIC RARE-EARTH GARNETS

1988 ◽  
Vol 49 (C8) ◽  
pp. C8-955-C8-956 ◽  
Author(s):  
N. P. Kolmakova ◽  
R. Z. Levitin ◽  
A. I. Popov ◽  
N. F. Vedernikov ◽  
A. K. Zvezdin ◽  
...  
Keyword(s):  
Rare Earth ◽  
Crystal Field ◽  
Field Dependence ◽  
Linear Birefringence

Selectivity Loss Due to Magnetic Field in Laser Isotope Separation of Gadolinium Based on Polarization Selection Rules

2003 ◽  
Vol 40 (12) ◽  
pp. 1014-1018 ◽  
Author(s):  
Shigeki TOKITA ◽  
Yasukazu IZAWA ◽  
Hideaki NIKI ◽  
Fumiyoshi KUWASHIMA
Keyword(s):  
Magnetic Field ◽  
Isotope Separation ◽  
Selection Rules ◽  
Laser Isotope Separation

Air-Stable n-Channel Organic Single-Crystal Field-Effect Transistors

2008 ◽  
Author(s):  
Takafumi Uemura ◽  
Masakazu Yamagishi ◽  
Yukihiro Tominari ◽  
Jun Takeya
Keyword(s):  
Single Crystal ◽  
Crystal Field ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Crystal Field Effect ◽  
Organic Single Crystal
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