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Metastable bound st...
Metastable bound states of the interacting two-dimensional magnetoexcitons
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- Moskalenko, S. A. (författare)
- Inst Appl Phys, Acad Str 5, MD-2028 Kishinev, Moldova.
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Khadzhi, P. , I (författare)
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Podlesny, I. , V (författare)
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Dumanov, E. , V (författare)
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- Liberman, Michael A. (författare)
- Stockholms universitet,KTH,Nordic Institute for Theoretical Physics NORDITA,Stockholm Univ, Roslagstullsbacken 23, SE-10691 Stockholm, Sweden.,Nordiska institutet för teoretisk fysik (Nordita)
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- Zubac, I. A. (författare)
- Inst Appl Phys, Acad Str 5, MD-2028 Kishinev, Moldova.
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Inst Appl Phys, Acad Str 5, MD-2028 Kishinev, Moldova Nordic Institute for Theoretical Physics NORDITA (creator_code:org_t)
- Elsevier, 2018
- 2018
- Engelska.
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Ingår i: Solid State Communications. - : Elsevier. - 0038-1098 .- 1879-2766. ; 283, s. 14-21
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- The possible formation of two-dimensional (2D) magnetic biexcitons composed of two 2D magnetoexcitons with electrons and holes on the lowest Landau levels (LLLs) with opposite center-of-mass wave vectors (k)over-right-arrow and -(k)over-right-arrow and with antiparallel electric dipole moments perpendicular to the corresponding wave vectors was investigated. Two spinor structures of two electrons and of two holes were considered. In the singlet-singlet state the spins of two electrons as well as the effective spins of two holes create the combinations with the total spin S = 0 and its projection on the magnetic field S-z = 0. The triplet-triplet state corresponds to S = 1 and S-z = 0. Two orbital Gaussian variational wave functions depending on vertical bar(k)over-right-arrow vertical bar and describing the relative motion of two magnetoexcitons inside the molecule were used. Analytical calculations show that in the LLLs approximation the stable bound states of bimagnetoexcitons do not exist, but there is a metastable bound state with the orbital wave function, having the maximum on the in-plane ring for the triplet-triplet spin configuration. The metastable bound state has an energy activation barrier comparable with the magnetoexciton ionization potential and gives rise to the new luminescence band due to the metastable biexciton-para exciton conversion with the frequencies higher than those of the para magnetoexciton luminescence line.
Ämnesord
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Nyckelord
- Semiconductors
- Exciton
- Magnetic field
- Interaction
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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