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Application of Tietz potential to study optical properties of spherical quantum dots
Springer Science and Business Media LLC - Tập 85 - Trang 723-737 - 2015
R KHORDAD, B MIRHOSSEINI
In this work, we study the optical properties of spherical quantum dots by using Tietz potential. In this regard, we have applied Nikiforov–Uvarov (NU) technique and numerically solved the Schrödinger equation to obtain energy levels and wave functions. Then, by using the density matrix method, we have derived expressions for the changes in linear and third-order nonlinear absorption coefficients ...... hiện toàn bộ
Nonequilibrium noise and instabilities in membranes with active pumps
Springer Science and Business Media LLC - Tập 53 - Trang 237-242 - 1999
Sriram Ramaswamy, John Toner, Jacques Prost
We study the statistical properties and dynamics of flexible fluid membranes containing active transmembrane proteins and find that such active membranes can be either stable or unstable to small disturbances, depending on the signs of certain crucial parameters characterising the protein-membrane interaction. A major finding is that the shape-fluctuation spectrum in the stable case for a zero-ten...... hiện toàn bộ
Ultra-low-frequency dust-electromagnetic modes in self-gravitating magnetized dusty plasmas
Springer Science and Business Media LLC - - 2001
A. K. Banerjee, Morshed Alam, A. A. Mamun
Problems with tunneling of thin shells from black holes
Springer Science and Business Media LLC - Tập 70 - Trang 3-26 - 2008
Borun D. Chowdhury
It is shown that exp(−2 Im(∫ p dr)) is not invariant under canonical transformations in general. Specifically for shells tunneling out of black holes, this quantity is not invariant under canonical transformations. It can be interpreted as the transmission coefficient only in the cases in which it is invariant under canonical transformations. Although such cases include alpha decay, they do not in...... hiện toàn bộ
Defect correlation in liquid crystal: Experimental verification of cosmological Kibble mechanism
Springer Science and Business Media LLC - Tập 53 - Trang 1087-1091 - 1999
Rajarshi Ray
In this talk we present observation of correlated production of strength one defects and anti-defects formed in isotropic-nematic phase transition in NLC. We find the width σ of the distribution of net winding number, to be in good agreement with the value predicted by the Kibble mechanism for defect production.
Raman intensity analysis of LaCl3
Springer Science and Business Media LLC - Tập 12 - Trang 139-150 - 1979
N Satyavathi, N Rajeswar Rao
Raman intensity analysis of LaCl3 on lines adopted earlier for crystals like LiNO3, KNO3 or YVO4 is found to be unsuitable for LaCl3. The rotation of the LaCl3 pyramids in the unit cell of this crystal is represented by high frequencies, comparable to the internal oscillations of LaCl3 molecule. The intensity ofR z, rotation about the symmetry axis of the crystal, is higher than th...... hiện toàn bộ
The crystal structure of (L-proline-L-alanine) copper (II)·2·5 H2O
Springer Science and Business Media LLC - Tập 19 - Trang 51-57 - 1982
V Amirthalingam, K V Muralidharan
The crystal and molecular structure of (L-proline-L-alanine) Cu·2·5 H2O has been determined by the heavy atom method with 583 visually estimated reflexions and refined by full matrix least squares toR=0·101. The crystals are monoclinic witha=16·47 (3),b=7·74 (2),c=9·51 (3) Å andβ=109·7 (5)°; space groupC2;Z=4. The copper coordination is nearly square pyramidal with one water in the basal plane and...... hiện toàn bộ
Elastic behaviour of lead fluoride under pressure
Springer Science and Business Media LLC - Tập 34 - Trang 297-302 - 1990
R K Singh, C N Rao
The variation of the second-order elastic constants (SOECs) and the longitudinal and shear modulii with hydrostatic pressure for the lead fluoride (PbF2) has been investigated for the first time by means of a three-body force potential (TBP) model. The significance of three-body interactions (TBI) has been clearly demonstrated in reproducing the elastic constant variations and the pressure derivat...... hiện toàn bộ
The geometric phase and ray space isometries
Springer Science and Business Media LLC - Tập 48 Số 5 - Trang 959-967 - 1997
Joseph Samuel
Strange solitons in a chiral quark-meson model
Springer Science and Business Media LLC - Tập 40 - Trang 291-297 - 1993
J Segar, M S Sri Ram
We consider aSU(3) quark soliton model based on chiral invariant quark-meson coupling. We find soliton solutions with nonzero strangeness andB=1 in the model with nontrivial kaonic fields, for values of the coupling constant greater than the phenomenologically acceptable number. Hence they do not correspond to known strange baryons.
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