Electron-Hole Distribution and Exciton Condensed Phase Formation in Semiconductor Quantum Wells

Chernyuk, A. A.; Sugakov, V. I.

doi:10.12693/aphyspola.110.169

Cited by 3 publications

(4 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The phenomenon has the threshold behavior with respect to a pumping. After the successful observation of periodical structures in the system of indirect excitons in double quantum well on the base of AlGaAs crystal by Timofeev's and Butov's groups, the several works were fulfilled [24][25][26][27][28][29][30] in this model devoted to explanation of the experiments. The theoretical approaches of the works [24][25][26][27][28][29][30] are based on the following assumptions.…”

Section: Introductionmentioning

confidence: 99%

“…The theory, developed in the works [24][25][26][27][28][29][30] , has explained many features of the indirect exciton manifestation in the double quantum wells on the base AlGaAs crystal. So, the observed in 4 behavior of narrow band as a function of the pumping and the temperature is presented in 25 .…”

Section: Introductionmentioning

confidence: 99%

“…The theory described the sizes of the islands, the distances between them, their appearance and vanishing depending on pumping and temperature. The calculated behavior of the condensed phase islands around two laser spots observed in 7 is presented in 30 . At approaching the centers of lasers spots, the rings of the emission around two spots transform from two rings around two centers to the deformed single ring with two laser spots inside the ring in according with experiment 7 .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Exciton condensation in quantum wells. Exciton hydrodynamics. The effect of localized states

Sugakov¹

2014

Condens. Matter Phys.

View full text Add to dashboard Cite

The hydrodynamic equations for indirect excitons in the double quantum wells are studied taking into account 1) a possibility of an exciton condensed phase formation, 2) the presence of pumping, 3) finite value of the exciton lifetime, 4) exciton scattering by defects. The threshold pumping emergence of the periodical exciton density distribution is found. The role of localized and free exciton states is analyzed in the formation of emission spectra.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Exciton condensation in quantum wells. Exciton hydrodynamics. The effect of localized states

Sugakov¹

2014

Condens. Matter Phys.

View full text Add to dashboard Cite

show abstract

“…The region without islands appears between the laser spots in the case of two external rings at close distances (see the experiment 2 and the calculation of Ref. 45 ). The following arguments give a qualitative explanation of this fact.…”

Section: Structures Emerging In Case Of Irradiation By Two Lasersmentioning

confidence: 74%

Model of fragmentation of the exciton inner ring in semiconductor quantum wells

2014

View full text Add to dashboard Cite

The appearance of the non-homogeneous structures of the indirect exciton density distribution in the region of the quantum well (in the region of the inner ring) is explained. The structure (the fragmentation) occurs due to the exciton condensed phase formation because of interaction between excitons. The formation of the structure is related with the non-equalibrity of the system, which is caused by the exciton finite lifetime and the presence of the pumpimg. The structure emerges in the shape of a set of islands or circles of the condensed phase. The structure type depends on the pumping intensity, the size of the laser spot and disappears with increasing the temperature. The merging of two structures, created by different laser spots, is investigated at decreasing the distance between the centers of the spots.

show abstract

Exciton phase transitions in semiconductor quantum wells with disc-shaped electrode

Chernyuk¹,

Sugakov²,

Tomylko³

2012

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

Phase transitions in a system of indirect excitons in semiconductor double quantum wells are studied for a set-up when one of the electrodes is of finite size and, in particular, has the shape of a disc. At voltage a region under the rim of the disc is created where excitons have lower energy, thus providing a macroscopic trap attractive for excitons while being repulsive for charged particles. The theory of the formation of patterns of the excitonic condensed phase under the disc is built based on the assumption of the existence of the inter-exciton range where the interaction between them is attractive. The finite value of the exciton lifetime is taken into account serving as a limiting factor for the size of the islands of the condensed phase. The calculations reveal complex restructuring of the patterns of the spatial distribution of exciton density with increasing pumping intensity: from the structureless gaseous phase to separate islands of the condensed phase within the gaseous phase, then to islands of the gaseous phase in the bulk of the condensed phase and finally to the continuous condensed phase.

show abstract

Electron-Hole Distribution and Exciton Condensed Phase Formation in Semiconductor Quantum Wells

Cited by 3 publications

References 10 publications

Exciton condensation in quantum wells. Exciton hydrodynamics. The effect of localized states

Exciton condensation in quantum wells. Exciton hydrodynamics. The effect of localized states

Model of fragmentation of the exciton inner ring in semiconductor quantum wells

Exciton phase transitions in semiconductor quantum wells with disc-shaped electrode

Contact Info

Product

Resources

About