The spin structure of quasi-two-dimensional biexcitons in quantum wells

Smadari Ben-Tabou De-Leon; B. Laikhtman

doi:10.1209/epl/i2002-00186-5

The spin structure of quasi-two-dimensional biexcitons in quantum wells

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Abstract

We explain the experimental observation of only zero-spin biexciton in GaAs quantum wells, contrary to different spin configurations known in bulk crystals. Making use of the exciton Hamiltonian that reduces the four-body biexciton problem to two-exciton problem, we show that the only possible bound state of two excitons is a linear combination of two bright excitons with spins ±1 and two dark excitons with spins ±2. We suggest experiments that can detect the existence of the dark component of the biexciton wave function.

Original language	English
Pages (from-to)	728-734
Number of pages	7
Journal	Europhysics Letters
Volume	59
Issue number	5
DOIs	https://doi.org/10.1209/epl/i2002-00186-5
State	Published - Sep 2002
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy

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10.1209/epl/i2002-00186-5

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title = "The spin structure of quasi-two-dimensional biexcitons in quantum wells",

abstract = "We explain the experimental observation of only zero-spin biexciton in GaAs quantum wells, contrary to different spin configurations known in bulk crystals. Making use of the exciton Hamiltonian that reduces the four-body biexciton problem to two-exciton problem, we show that the only possible bound state of two excitons is a linear combination of two bright excitons with spins ±1 and two dark excitons with spins ±2. We suggest experiments that can detect the existence of the dark component of the biexciton wave function.",

author = "\{Ben-Tabou De-Leon\}, Smadari and B. Laikhtman",

year = "2002",

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doi = "10.1209/epl/i2002-00186-5",

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N2 - We explain the experimental observation of only zero-spin biexciton in GaAs quantum wells, contrary to different spin configurations known in bulk crystals. Making use of the exciton Hamiltonian that reduces the four-body biexciton problem to two-exciton problem, we show that the only possible bound state of two excitons is a linear combination of two bright excitons with spins ±1 and two dark excitons with spins ±2. We suggest experiments that can detect the existence of the dark component of the biexciton wave function.

AB - We explain the experimental observation of only zero-spin biexciton in GaAs quantum wells, contrary to different spin configurations known in bulk crystals. Making use of the exciton Hamiltonian that reduces the four-body biexciton problem to two-exciton problem, we show that the only possible bound state of two excitons is a linear combination of two bright excitons with spins ±1 and two dark excitons with spins ±2. We suggest experiments that can detect the existence of the dark component of the biexciton wave function.

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DO - 10.1209/epl/i2002-00186-5

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JO - Europhysics Letters

JF - Europhysics Letters

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ER -

The spin structure of quasi-two-dimensional biexcitons in quantum wells

Abstract

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