Density-functional calculations in a two-dimensional finite-element basis for atoms in very strong magnetic fields: Energy values

2002 ◽  
Vol 65 (3) ◽  
Author(s):  
M. Braun
Keyword(s):  
Finite Element ◽  
Magnetic Fields ◽  
Density Functional Calculations ◽  
Density Functional ◽  
Two Dimensional ◽  
Strong Magnetic Fields ◽  
Dimensional Finite Element

Effects of external fields on the optical absorption of quantum multirings

2020 ◽  
Vol 34 (17) ◽  
pp. 2050153
Author(s):  
S. Ghajarpour-Nobandegani ◽  
V. Ashrafi-Dalkhani ◽  
M. J. Karimi
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Magnetic Fields ◽  
Optical Absorption ◽  
Density Matrix ◽  
Two Dimensional ◽  
Matrix Approach ◽  
Energy Eigenvalues ◽  
Electric And Magnetic Fields ◽  
Dimensional Finite Element

In this paper, the effects of the electric and magnetic fields on the optical absorption of GaAs/AlGaAs quantum multirings were studied. Using the two-dimensional finite element method, energy eigenvalues and wavefunctions were calculated, and optical absorption was obtained by the density matrix approach. The result showed that optical absorption increases with increasing number and size of the rings.

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