Light Absorption Spectrum of the Insulating System driven by the Strong Coulomb Repulsion

Aloin and polysaccharide present in extracts of Aloe arborescens Miller were formulated into a binary solution to protect eyes from bacterial infection and ultraviolet radiation (UVR). The UVR absorption spectrum was recorded from 190 to 440 nm using a UV spectrometer. The physical properties of the product were examined in terms of its appearance, odor, pH, viscosity, density, refractive index, and stability. The binary solution exhibited three absorption peaks in the UVA, B and C regions, respectively. Such UV absorption capability was attributed to the phenolic chromophores pertaining to aloin. The present study suggested that the formulated binary solution has potential application as an UV absorption agent with built-in antimicrobial activity.

Download Full-text

Fine structure of the light absorption spectrum of antiferromagnetic NaMnCl3

Russian Physics Journal ◽

10.1007/s11182-005-0012-6 ◽

2004 ◽

Vol 47 (10) ◽

pp. 988-994

Author(s):

E. A. Popov

Keyword(s):

Absorption Spectrum ◽

Fine Structure ◽

Light Absorption

Download Full-text

Fractional orbital occupation of spin and charge in artificial atoms

Canadian Journal of Physics ◽

10.1139/p10-108 ◽

2011 ◽

Vol 89 (2) ◽

pp. 213-217 ◽

Cited By ~ 1

Author(s):

Catherine J. Stevenson ◽

Jordan Kyriakidis

Keyword(s):

Coulomb Repulsion ◽

Spin Projection ◽

Spin Correlations ◽

The Core ◽

Valence Electrons ◽

Charge Correlations ◽

Inert Core ◽

Strong Coulomb ◽

The Common ◽

Orbital Occupation

We present results on spin and charge correlations in two-dimensional quantum dots as a function of increasing Coulomb strength (dielectric constant). We look specifically at the orbital occupation of both spin and charge. We find that charge and spin evolve separately, especially at low Coulomb strength. For the charge, we find that a hole develops in the core orbitals at strong Coulomb repulsion, invalidating the common segregation of confined electrons into an inert core and active valence electrons. For excitations, we find a total spin-projection Sz = –1/2 breaks apart into separate occupations of net positive and negative spin. This dissociation is caused by spin correlations alone. Quantum fluctuations arising from long-range Coulomb repulsion destroy the spin dissociation and eventually results in all orbitals carrying a negative spin.

Download Full-text

Эффективные взаимодействия, индуцированные спин-орбитальной связью в сверхпроводящих нанопроволоках в режиме сильных корреляций

Физика твердого тела ◽

10.21883/ftt.2020.09.49768.36h ◽

2020 ◽

Vol 62 (9) ◽

pp. 1447

Author(s):

А.О. Злотников ◽

С.В. Аксенов ◽

М.С. Шустин

Keyword(s):

Coupling Parameter ◽

Coulomb Repulsion ◽

Open Boundary ◽

Spin Orbit Coupling ◽

Edge States ◽

Open Boundary Conditions ◽

Strong Electron ◽

Effective Interactions ◽

Strong Coulomb ◽

Superconducting Nanowire

Abstract In the second order of the operator form of the perturbation theory, the effective interactions in a superconducting nanowire have been obtained at the strong electron correlations, when the spin–orbit coupling parameter is comparable with the hopping integral. Using the exact diagonalization technique, in short nanowires with the open boundary conditions at the strong Coulomb repulsion, the excitations corresponding to the Majorana edge states with the energy below the value of a bulk superconducting gap have been demonstrated.

Download Full-text

"Брэгговская" решетка заселенности электронов, наводимая в гетероструктуре Al-=SUB=-x-=/SUB=-Ga-=SUB=-1-x-=/SUB=-As-GaAs-Al-=SUB=-x-=/SUB=-Ga-=SUB=-1-x-=/SUB=-As ее собственным стимулированным пикосекундным излучением

Физика и техника полупроводников ◽

10.21883/ftp.2020.10.49937.9314 ◽

2020 ◽

Vol 54 (10) ◽

pp. 1018

Author(s):

Н.Н. Агеева ◽

И.Л. Броневой ◽

Д.Н. Забегаев ◽

А.Н. Кривоносов

Keyword(s):

Absorption Spectrum ◽

Boundary Conditions ◽

Semiconductor Laser ◽

Light Absorption ◽

Optical Pumping ◽

Gain Spectrum ◽

Experimental Results ◽

High Quality ◽

Lattice Design

It was shown that the modulation of the spectrum of stimulated picosecond emission generated in the AlxGa1-xAs–GaAs–AlxGa1-xAs waveguide heterostructure upon optical pumping of GaAs, and a number of previous experimental results become explainable under the assumption that emission forms a symmetric modification of the “Bragg” population lattice of nonequilibrium electrons GaAs. Boundary conditions defining the lattice design are proposed. In particular, in order to satisfy them, the lattice can only change discretely. The latter is consistent with a change in the modulation of the light absorption spectrum in GaAs, which reflects the modulation of population depletion created by emission in a high-quality heterostructure. The latter is consistent with a change in the modulation of the light absorption spectrum in GaAs, which reflects the modulation of population depletion created by emission. Inducing the lattice, i.e. burning out spatial holes, is one of the reasons for the multimode nature of emission, competition and switching of its modes, modulation of the gain spectrum (burning out frequency holes). The same is possible in a semiconductor laser, as in a waveguide.

Download Full-text