scholarly journals Correlation functions in electron-electron and electron-hole double quantum wells: Temperature, density, and barrier-width dependence

2019 ◽  
Vol 99 (3) ◽  
Author(s):  
M. W. C. Dharma-wardana ◽  
D. Neilson ◽  
F. M. Peeters
Keyword(s):  
Quantum Wells ◽  
Correlation Functions ◽  
Double Quantum ◽  
Barrier Width ◽  
Electron Hole

Plasmons in coupled electron-hole double quantum wells

2001 ◽  
Vol 64 (12) ◽  
Author(s):  
G. R. Aizin ◽  
B. Laikhtman ◽  
Godfrey Gumbs
Keyword(s):  
Quantum Wells ◽  
Double Quantum ◽  
Electron Hole

scholarly journals Effect of Mismatched Electron-Hole Effective Masses on Superfluidity in Double Layer Solid-State Systems

2021 ◽  
Vol 6 (2) ◽  
pp. 14
Author(s):  
Sara Conti ◽  
Andrea Perali ◽  
François M. Peeters ◽  
David Neilson
Keyword(s):  
Quantum Wells ◽  
Double Layer ◽  
Semiconductor Heterostructures ◽  
Double Quantum ◽  
Pairing Interaction ◽  
Electron Hole ◽  
Strongly Coupled ◽  
Mass Imbalance ◽  
Effective Masses ◽  
Self Consistent

Superfluidity has been predicted and now observed in a number of different electron-hole double-layer semiconductor heterostructures. In some of the heterostructures, such as GaAs and Ge-Si electron-hole double quantum wells, there is a strong mismatch between the electron and hole effective masses. We systematically investigate the sensitivity to unequal masses of the superfluid properties and the self-consistent screening of the electron-hole pairing interaction. We find that the superfluid properties are insensitive to mass imbalance in the low density BEC regime of strongly-coupled boson-like electron-hole pairs. At higher densities, in the BEC-BCS crossover regime of fermionic pairs, we find that mass imbalance between electrons and holes weakens the superfluidity and expands the density range for the BEC-BCS crossover regime. This permits screening to kill the superfluid at a lower density than for equal masses.

Fabrication of independently contacted and tuneable 2D-electron-hole systems in GaAs/AlGaAs double quantum wells

1998 ◽  
Vol 51 (1-3) ◽  
pp. 207-211 ◽  
Author(s):  
H Rubel ◽  
A Fischer ◽  
W Dietsche ◽  
K Von Klitzing ◽  
K Eberl
Keyword(s):  
Quantum Wells ◽  
Double Quantum ◽  
Electron Hole

Coulomb correlations and electron-hole liquid in double quantum wells

JETP Letters ◽  
2013 ◽  
Vol 97 (11) ◽  
pp. 628-633 ◽  
Author(s):  
V. S. Babichenko ◽  
I. Ya. Polishchuk
Keyword(s):  
Quantum Wells ◽  
Double Quantum ◽  
Electron Hole ◽  
Coulomb Correlations

Resonances in the Electron, Hole and Exciton Transfer in Biased Double Quantum Wells

1991 ◽  
Vol T39 ◽  
pp. 283-287 ◽  
Author(s):  
M Voos ◽  
P Rolland ◽  
R Ferreira ◽  
C Delalande ◽  
G Bastard
Keyword(s):  
Quantum Wells ◽  
Double Quantum ◽  
Electron Hole ◽  
Exciton Transfer

RKKY Interaction Between Impurities in GaAs/AlAs Quantum Wells

1997 ◽  
Vol 11 (05) ◽  
pp. 195-199
Author(s):  
I. C. da Cunha Lima ◽  
L. G. Ferreira Filho ◽  
A. Troper
Keyword(s):  
Field Strength ◽  
Electric Field ◽  
Quantum Wells ◽  
Strong Electric Field ◽  
Double Quantum ◽  
Magnetic Impurities ◽  
Barrier Width ◽  
Rkky Interaction ◽  
Double Quantum Well ◽  
Fast Decrease

The RKKY interaction between two magnetic impurities in a GaAs/AlAs double quantum well under a strong electric field perpendicular to the interfaces is obtained as a function of the field strength and the barrier width. We obtain a fast decrease of the exchange with the barrier width for the impurities lying in different wells. At intermediate strengths and small barrier widths, a structure is observed in the inter-well exchange.

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.

EXCITONIC CHARGE-DENSITY WAVE: A NOVEL PHASE OF DOUBLE QUANTUM WELL SYSTEMS

1992 ◽  
Vol 06 (03) ◽  
pp. 145-149
Author(s):  
X.M. CHEN ◽  
J.J. QUINN
Keyword(s):  
Charge Density ◽  
Quantum Wells ◽  
Charge Density Wave ◽  
Density Wave ◽  
Double Quantum ◽  
Electron Hole ◽  
Wave State ◽  
Hartree Fock ◽  
Double Quantum Well ◽  
Double Charge

Theoretical studies of collective excitations of double quantum wells (DQW’s) in a strong magnetic field indicate that the systems undergo a phase transition when the well separation is larger than a critical value. For electron-hole DQW’s, we find that in the Hartree-Fock approximation this transition generates a novel excitonic density wave state, which has a lower energy than either a homogeneous excitonic fluid or a double charge-density wave state.

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