POLARON CORRECTION TO THE NEGATIVE DONOR ON THE HETERO-INTERFACE IN MAGNETIC FIELDS (II–VI CRYSTALS)

2003 ◽  
Vol 17 (31n32) ◽  
pp. 6097-6107 ◽  
Author(s):  
XIAOYAN ZHANG ◽  
XU WANG ◽  
GUOLIANG FAN
Keyword(s):  
Magnetic Fields ◽  
Variational Method ◽  
Triplet State ◽  
Numerical Results ◽  
Binding Energies ◽  
Phonon Coupling ◽  
Polar Crystal ◽  
Spin Triplet

Negative donor ion on the hetero-interface in magnetic fields are investigated. Using a variational method, we have calculated the binding energies of D- center for the spin-triplet state of L=-1 in this structure. Moreover, the effect of electron-interface phonon coupling on the energy of a donor located in a polar-crystal hetero-interface is found. Numerical results are produced for heterostructures of some II–VI crystals.

TWO-DIMENSIONAL D- DONOR IN A STRONG MAGNETIC FIELD

2008 ◽  
Vol 22 (26) ◽  
pp. 2579-2585
Author(s):  
XIAOYAN ZHANG ◽  
GUOLIANG FAN ◽  
JINFENG WANG
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Variational Method ◽  
Bound State ◽  
Binding Energies ◽  
Triplet States ◽  
Two Dimensional ◽  
Threshold Values ◽  
Spin Triplet ◽  
The Magnetic Field

Two-dimensional negative donor ion in magnetic fields are investigated. Using a variational method, we calculated the binding energies of D- center for the spin-triplet states of L = -2 and L = -3 in this structure. The threshold values of the magnetic field which turn unbound state into bound state were obtained.

XPS Spectra of Spin-Triplet Cobalt(III) Complexes

1979 ◽  
Vol 34 (10) ◽  
pp. 1468-1470 ◽  
Author(s):  
Dennis G. Brown ◽  
Ulrich Weser
Keyword(s):  
Triplet State ◽  
Spectral Region ◽  
Magnetic Moments ◽  
Binding Energies ◽  
Photoelectron Spectra ◽  
Xps Spectra ◽  
Satellite Structure ◽  
X Ray ◽  
Spin Triplet

Abstract The X-ray photoelectron spectra of cobalt(III) complexes in an unusual spin triplet state are reported. The binding energies in the 2P spectral region are somewhat low and the spectra exhibit rather strong satellite structure. The Co 2P1/2-CO 2P3/2 separations and satellite intensities appear to be related to the magnetic moments of the complexes as has been suggested previously for cobalt(II) compounds.

DECOHERENCE OF THE TRIANGULAR BOUND POTENTIAL QUANTUM DOT QUBIT

2009 ◽  
Vol 23 (27) ◽  
pp. 3273-3279 ◽  
Author(s):  
JIA-KUI SUN ◽  
HONG-JUAN LI ◽  
JING-LIN XIAO
Keyword(s):  
Quantum Dot ◽  
Variational Method ◽  
Excited States ◽  
Polar Angle ◽  
Numerical Results ◽  
Coupling Constant ◽  
Phonon Coupling ◽  
Strongly Coupled ◽  
Decoherence Rate ◽  
Triangular Bound Potential

We study the eigenenergies and the eigenfunctions of the ground and the first excited states of an electron, which is strongly coupled to the LO-phonon in a quantum dot with triangular bound potential by using the Pekar variational method. This system may be used as a two-level qubit. Our numerical results indicate that the decoherence rate will decrease with increasing the confinement length of the quantum dot (QD) and decrease with increasing electron-LO-phonon coupling constant. The influences of the polar angle on the decoherence rate are dominant when the coupling constant increases, while the effects of the polar angle on that are strong when the confinement length increases. Meanwhile, the decoherence rate varies periodically with respect to the polar angle.

Matter in superstrong magnetic fields

1986 ◽  
Vol 64 (3) ◽  
pp. 256-268 ◽  
Author(s):  
J. E. Skjervold ◽  
E. Østgaard
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Variational Method ◽  
Cohesive Energy ◽  
Condensed Matter ◽  
Binding Energies ◽  
Free Atoms ◽  
The Difference ◽  
Cohesive Energies

The behaviour of condensed matter in superstrong magnetic fields of the order of 1012–1015 G is investigated, i.e., binding energies of atoms in condensed matter are calculated by a variational method. The cohesive energy, i.e., the difference between the binding energies of free atoms and of atoms in condensed matter, is also calculated, and results are obtained for hydrogen, helium, carbon, oxygen, silicon, and iron atoms.For a magnetic field of 1012 G, we obtain binding energies for atoms in condensed matter of 0.2 keV for hydrogen, 0.7 keV for helium, 4.5 keV for carbon, 7.4 keV for oxygen, 20.0 keV for silicon, and 59.0 keV for iron. For a magnetic field of 1014 G, we get corresponding binding energies of 1.2 keV for hydrogen, 3.9 keV for helium, 27.0 keV for carbon, 44.9 keV for oxygen, 121.5 keV for silicon, and 366 keV for iron. For a magnetic field of 1012 G, we obtain cohesive energies of 0.04 keV for hydrogen, 0.10 keV for helium, 0.36 keV for carbon, 0.51 keV for oxygen, 1.4 keV for silicon, and 2.8 keV for iron. For a magnetic field of 1014 G, we get corresponding cohesive energies of 0.16 keV for hydrogen, 0.40 keV for helium, 1.9 keV for carbon, 3.0 keV for oxygen, 7.3 keV for silicon, and 19.4 keV for iron.

Polaron Effect on the D- Center at the InP(GaP) Heterointerface in a Magnetic Field

2012 ◽  
Vol 430-432 ◽  
pp. 16-19
Author(s):  
Xiao Yan Zhang ◽  
Guo Liang Fan
Keyword(s):  
Magnetic Field ◽  
Perturbation Theory ◽  
Variational Principle ◽  
Triplet State ◽  
Numerical Results ◽  
Order Perturbation ◽  
Order Perturbation Theory ◽  
Polaron Effect ◽  
Spin Triplet ◽  
Second Order Perturbation Theory

Effect of polaron on the spin triplet state (p-like) of the center is discussed by means of variational principle and second-order perturbation theory. Numerical results are produced for heterostructures of InP(GaP) in a magnetic field. We find that the polaron correction is very important. The contribution of the polaron is not negligible.

Influence of magnetic fields on the P-870 triplet state in Rps. sphaeroides reaction centers

1986 ◽  
Vol 10 (3) ◽  
pp. 347-354 ◽  
Author(s):  
M. H. Vidal ◽  
P. Setif ◽  
P. Mathis
Keyword(s):  
Magnetic Fields ◽  
Triplet State ◽  
Reaction Centers

BUILT-IN ELECTRIC FIELD EFFECT ON DONOR IMPURITIES IN STRAINED WURTZITE GaN/AlGaN ASYMMETRIC DOUBLE QUANTUM WELLS

2012 ◽  
Vol 26 (26) ◽  
pp. 1250172 ◽  
Author(s):  
JUN ZHU ◽  
SHI LIANG BAN ◽  
SI HUA HA
Keyword(s):  
Variational Method ◽  
Electric Field ◽  
Quantum Wells ◽  
Ground State ◽  
Field Effect ◽  
Binding Energies ◽  
Double Quantum ◽  
Electric Field Effect ◽  
Material Parameters ◽  
Asymmetric Double Quantum Wells

The ground state binding energies of donor impurities in strained [0001]-oriented wurtzite GaN / Al x Ga 1-x N asymmetric double quantum wells are investigated using a variational method combined with numerical computation. The built-in electric field due to the spontaneous and strain-induced piezoelectric polarization and the strain modification on material parameters are taken into account. The variations of binding energies versus the width of central barrier, the ratio of two well widths, and the impurity position are presented, respectively. It is found that the built-in electric field causes a mutation of binding energies with increasing the width of central barrier to some value. The results for symmetrical double quantum wells and without the built-in electric field are also discussed for comparison.

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