scholarly journals Magnetic and charge orders in the ground state of the Emery model: Accurate numerical results

2020 ◽  
Vol 102 (21) ◽  
Author(s):  
Adam Chiciak ◽  
Ettore Vitali ◽  
Shiwei Zhang
Keyword(s):  
Ground State ◽  
Numerical Results ◽  
Emery Model

scholarly journals Calculations of the decay transitions of the modified Pöschl–Teller potential model via Bohr Hamiltonian technique

2017 ◽  
Vol 26 (11) ◽  
pp. 1750073 ◽  
Author(s):  
Nahid Soheibi ◽  
Majid Hamzavi ◽  
Mahdi Eshghi ◽  
Sameer M. Ikhdair
Keyword(s):  
Experimental Data ◽  
Ground State ◽  
Potential Model ◽  
Electric Quadrupole ◽  
Numerical Results ◽  
Transition Rates ◽  
Collective Hamiltonian

We calculate the eigenvalues and their corresponding eigenfunctions of the Bohr’s collective Hamiltonian with the help of the modified Pöschl–Teller (MPT) potential model within [Formula: see text]-unstable structure. Our numerical results for the ground state (g.s.) [Formula: see text] and [Formula: see text] band heads, together with the electric quadrupole [Formula: see text] transition rates, are displayed and compared with the available experimental data.

QUANTUM SIZE EFFECT ON THE BINDING ENERGIES OF GROUND-STATE AND EXCITED-STATE EXCITONS IN A WURTZITE ZnO NANOWIRE

2013 ◽  
Vol 27 (09) ◽  
pp. 1350032
Author(s):  
LI ZHANG
Keyword(s):  
Ground State ◽  
Variational Approach ◽  
Quantum Wires ◽  
Emission Spectra ◽  
Numerical Results ◽  
Binding Energies ◽  
Dielectric Constants ◽  
Quantum Size ◽  
Excitonic States ◽  
Two Parameter

Taking into account the anisotropic confined situations of quasi-one-dimensional (Q1D) nanowires (NWs) in axial and radial directions and the anisotropic wurtzite ZnO crystal, a two-parameter variational approach is brought forward and applied to investigate luminous properties of excitonic states in wurtzite ZnO NW systems. The quantum size effects on the excitonic binding energies of the ground state and the first excited excitons as well as the emission spectra are analyzed in detail. Numerical calculations on a freestanding ZnO NW are performed. The calculated excitonic binding energies in the wurtzite ZnO NWs are far larger than those in cubic GaAs -based quantum wires and NWs with the same radius. This is ascribed to the large effective masses of electron and hole and relatively small dielectric constants in ZnO semiconductor. The excitons emission wavelengths calculated here qualitatively agree with recent experimental results of exciton spectra in Q1D ZnO NWs. This confirmed the reasonability and reliability of the present theoretical scheme and numerical results. The numerical results also show that the two-parameter variational approach is reasonable and necessary for the description of excitonic states in Q1D wurtzite ZnO NWs.

Lower bounds for the ground states of the He-isoelectronic series

1981 ◽  
Vol 59 (11) ◽  
pp. 1668-1669 ◽  
Author(s):  
Serafin Fraga
Keyword(s):  
Kinetic Energy ◽  
Lower Bounds ◽  
Ground State ◽  
Ground States ◽  
Numerical Results ◽  
Hartree Fock ◽  
Electron Atom ◽  
Isoelectronic Series

A formulation, based on the concept of null local kinetic energy regions, has been developed for the determination of lower bounds for the ground state of a two-electron atom. Numerical results, obtained from Hartree–Fock functions, are presented for the elements He through Kr of the two-electron series.

Renilla Bioluminescence: A Morphologic Approach to the Location of Photocytes

1974 ◽  
Vol 32 ◽  
pp. 208-209
Author(s):  
Ben O. Spurlock ◽  
Milton J. Cormier
Keyword(s):  
Excited State ◽  
Ground State ◽  
Molecular Basis ◽  
Light Emission ◽  
Chemical Basis ◽  
Electronic Excited State ◽  
Colonial Form ◽  
The Common ◽  
Eighteenth And Nineteenth Centuries ◽  
Catalyzed Oxidation

The phenomenon of bioluminescence has fascinated layman and scientist alike for many centuries. During the eighteenth and nineteenth centuries a number of observations were reported on the physiology of bioluminescence in Renilla, the common sea pansy. More recently biochemists have directed their attention to the molecular basis of luminosity in this colonial form. These studies have centered primarily on defining the chemical basis for bioluminescence and its control. It is now established that bioluminescence in Renilla arises due to the luciferase-catalyzed oxidation of luciferin. This results in the creation of a product (oxyluciferin) in an electronic excited state. The transition of oxyluciferin from its excited state to the ground state leads to light emission.

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