Exciton Gas versus Electron Hole Liquid in the Double Quantum Wells

2013 ◽  
Vol 1617 ◽  
pp. 37-42
Author(s):  
Vladimir S. Babichenko ◽  
Ilya Ya. Polishchuk
Keyword(s):  
Quantum Wells ◽  
Gas Phase ◽  
Double Quantum ◽  
Many Body ◽  
Electron Hole ◽  
Coupled Quantum Wells ◽  
The Many ◽  
Special Case ◽  
Selection Of ◽  
Body Correlation

ABSTRACTThe many-body correlation effects in the spatially separated electron and hole layers in the coupled quantum wells (CQW) are investigated. A special case of the many-component electron-hole system is considered, ν>>1 being the number of the components. Keeping the main diagrams in the parameter 1/ν allows us to justify the selection of the RPA diagrams. The ground state of the system is found to be the electron-hole liquid with the energy smaller than the dense exciton gas phase. The possible connection is discussed between the results obtained and the experiments in which the inhomogeneous state in the CQW is found.

Coulomb drag in strongly coupled quantum wells: Temperature dependence of the many-body correlations

2019 ◽  
Vol 115 (20) ◽  
pp. 202105
Author(s):  
M. Zarenia ◽  
S. Conti ◽  
F. M. Peeters ◽  
D. Neilson
Keyword(s):  
Quantum Wells ◽  
Temperature Dependence ◽  
Many Body ◽  
Coulomb Drag ◽  
Coupled Quantum Wells ◽  
Strongly Coupled ◽  
The Many

NOVEL ELECTRON GAS SYSTEMS

1999 ◽  
Vol 13 (05n06) ◽  
pp. 479-488 ◽  
Author(s):  
GAETANO SENATORE ◽  
F. RAPISARDA ◽  
S. CONTI
Keyword(s):  
Phase Diagram ◽  
Quantum Wells ◽  
Recent Progress ◽  
Electron Gas ◽  
Total Charge ◽  
Diffusion Monte Carlo ◽  
Electron Hole ◽  
Coupled Quantum Wells ◽  
Hartree Fock ◽  
The Ideal

We review recent progress on the physics of electrons in the bilayered electron gas, relevant to coupled quantum wells in GaAs/AlGaAs heterostructures. First, we focus on the phase diagram of a symmetric bilayer at T=B=0, obtained by diffusion Monte Carlo simulations. It is found that inter–layer correlations stabilize crystalline structures at intermediate inter–layer separation, while favouring a liquid phase at smaller distance. Also, the available DMC evidence is in contrast with the recently (Hartree–Fock) predicted total charge transfer (TCT), whereby all the electron spontaneously jump in one layer. In fact, one can show that such a TCT state is never stable in the ideal bilayer with no tunneling. We finally comment on ongoing DMC investigations on the electron-hole bilayer, where excitonic condensation is expected to take place.

Radiative recombination processes of the many-body states in multiple quantum wells

1990 ◽  
Vol 42 (5) ◽  
pp. 2893-2903 ◽  
Author(s):  
R. Cingolani ◽  
K. Ploog ◽  
A. Cingolani ◽  
C. Moro ◽  
M. Ferrara
Keyword(s):  
Quantum Wells ◽  
Radiative Recombination ◽  
Multiple Quantum Wells ◽  
Multiple Quantum ◽  
Many Body ◽  
Recombination Processes ◽  
The Many

Many-body Effects and the Role of Indirect Excitons in Asymmetric InGaAs/GaAs Double Quantum Wells

2016 ◽  
Author(s):  
Christopher L. Smallwood ◽  
Takeshi Suzuki ◽  
Travis M. Autry ◽  
Rohan Singh ◽  
Matthew W. Day ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Double Quantum ◽  
Many Body ◽  
Indirect Excitons ◽  
Many Body Effects

scholarly journals Configuration space method for calculating binding energies of exciton complexes in quasi-1D/2D semiconductors

2016 ◽  
Vol 30 (24) ◽  
pp. 1630006 ◽  
Author(s):  
I. V. Bondarev
Keyword(s):  
Binding Energy ◽  
Quantum Wells ◽  
Configuration Space ◽  
Binding Energies ◽  
Electron Hole ◽  
Coupled Quantum Wells ◽  
2D Semiconductors ◽  
Crossover Behavior ◽  
Confined Structures ◽  
Space Method

A configuration space method is developed for binding energy calculations of the lowest energy exciton complexes (trion, biexciton) in spatially confined quasi-1D semiconductor nanostructures such as nanowires and nanotubes. Quite generally, trions are shown to have greater binding energy in strongly confined structures with small reduced electron–hole masses. Biexcitons have greater binding energy in less confined structures with large reduced electron–hole masses. This results in a universal crossover behavior, whereby trions become less stable than biexcitons as the transverse size of the quasi-1D nanostructure increases. The method is also capable of evaluating binding energies for electron–hole complexes in quasi-2D semiconductors such as coupled quantum wells and bilayer van der Walls bound heterostructures with advanced optoelectronic properties.

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