The first excited state energy of strong coupled bound polaron in monolayer graphene

2018 ◽  
Vol 113 ◽  
pp. 20-24 ◽  
Author(s):  
Zhao-Hua Ding ◽  
Ying Zhao ◽  
Jing-Lin Xiao
Keyword(s):  
Excited State ◽  
State Energy ◽  
Monolayer Graphene ◽  
Excited State Energy ◽  
Bound Polaron ◽  
First Excited State

TRANSITION FREQUENCY OF STRONG-COUPLING IMPURITY BOUND POLARON IN AN ASYMMETRIC QUANTUM DOT

2012 ◽  
Vol 11 (03) ◽  
pp. 1250026 ◽  
Author(s):  
CHENG-SHUN WANG ◽  
YU-FANG CHEN ◽  
JING-JIN XIAO
Keyword(s):  
Excited State ◽  
Coupling Strength ◽  
State Energy ◽  
Transition Frequency ◽  
Phonon Coupling ◽  
Excited State Energy ◽  
Bound Polaron ◽  
Asymmetric Quantum Dot ◽  
Asymmetric Quantum ◽  
Electron Phonon Coupling

Properties of the excited state of strong-coupling impurity bound polaron in an asymmetric quantum dot are studied by using linear combination operator and unitary transformation methods. The first internal excited state energy, the excitation energy and the transition frequency between the first internal excited and the ground states of the impurity bound polaron as functions of the transverse and the longitudinal effective confinement lengths of the dot, the electron–phonon coupling strength and the Coulomb bound potential were derived. Our numerical results show that they will increase with decreasing the effective confinement lengths, due to interesting quantum size confining effects. But they are an increasing functions of the Coulomb bound potential. The first internal excited state energy is a decreasing function of the electron–phonon coupling strength whereas the transition frequency and the excitation energy are an increasing one of the electron–phonon coupling strength.

Evaluation of AlGaAs/GaAs Heterointerface by Shubnikov-de Haas Oscillation Measurements

1986 ◽  
Vol 77 ◽  
Author(s):  
Kazumi Kasai ◽  
H. Tanaka ◽  
H. Itoh ◽  
T. Oh-Hori ◽  
M. Takikawa ◽  
...  
Keyword(s):  
Excited State ◽  
State Energy ◽  
Energy Levels ◽  
Interface Model ◽  
Dimensional Electron ◽  
Excited State Energy ◽  
Haas Oscillation ◽  
First Excited State ◽  
A New Technique

ABSTRACTThe measurement of Shubnikov-de Haas(SdH) oscillation is proposed as a new technique for evaluating the quality of a heterointerface. The first excited state of 2-dimensional electron energy levels is determined for several samples using the measurements of SdH oscillation. Lower values of the first excited state energy are found for the samples with a low mobility. The low value can be approximately explained in terms of graded interface model.

Study of strong-coupling impurity bound polaron in a quantum pseudodot

2015 ◽  
Vol 29 (09) ◽  
pp. 1550058 ◽  
Author(s):  
R. Khordad
Keyword(s):  
Excited State ◽  
Quantum Dot ◽  
Strong Coupling ◽  
Coupling Strength ◽  
State Energy ◽  
Transition Frequency ◽  
Excited State Energy ◽  
Quantum Pseudodot ◽  
Bound Polaron ◽  
Potential Height

In the present work, we have studied the first internal excited state energy and transition frequency of strong-coupling impurity bound polaron in a quantum pseudodot using the well-known Lee–Low–Pines (LLP) unitary transformation method. We show the effect of Coulomb bound potential, electron–phonon (e–p) coupling strength, the quantum dot radius and potential height on first internal excited state energy and the transition frequency of the impurity bound polaron. According to the results, it is found that the first internal excited state energy is decreased with increasing quantum dot radius. Also, this energy is increased with enhancing potential height. The transition frequency is increased with increasing the e–p coupling strength. Also, the first internal excited state energy is increased with decreasing the e–p coupling strength. The transition frequency is enhanced with increasing the Coulomb bound potential.

TRANSITION FREQUENCY OF WEAK-COUPLING IMPURITY BOUND MAGNETOPOLARON IN AN ANISOTROPIC QUANTUM DOT

2012 ◽  
Vol 26 (01) ◽  
pp. 1150003 ◽  
Author(s):  
CHENG-SHUN WANG ◽  
JING-LIN XIAO
Keyword(s):  
Magnetic Field ◽  
Excited State ◽  
Quantum Dot ◽  
Weak Coupling ◽  
State Energy ◽  
Cyclotron Frequency ◽  
Excited State Energy ◽  
First Excited State ◽  
Anisotropic Quantum Dot ◽  
The Magnetic Field

We study the first excited-state energy, the excitation energy and the transition frequency between the first excited- and the ground-state of weak-coupling magnetopolaron in an anisotropic quantum dot. The effects of the Coulomb bound potential, the cyclotron frequency of the magnetic field, the electron–phonon interaction and the transverse and the longitudinal effective confinement lengths are taken into account by using the linear combination operator method. It is found that studied quantities will increase with increasing Coulomb bound potential and the cyclotron frequency of the magnetic field. They are decreasing functions of the effective confinement lengths, which can be attributed to the interesting quantum size confining effect. The first excited-state energy is a decreasing function of the electron–phonon coupling strength.

Excited-State Energy-Transfer Dynamics in Self-Assembled Triads Composed of Two Porphyrins and an Intervening Bis(dipyrrinato)metal Complex

2003 ◽  
Vol 42 (21) ◽  
pp. 6629-6647 ◽  
Author(s):  
Lianhe Yu ◽  
Kannan Muthukumaran ◽  
Igor V. Sazanovich ◽  
Christine Kirmaier ◽  
Eve Hindin ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Excited State ◽  
Metal Complex ◽  
State Energy ◽  
Excited State Energy ◽  
Self Assembled
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