Collective elementary excitations of two-dimensional magnetoexcitons in the bose-einstein condensation state with wave vector k = 0
The collective elementary excitations of the two-dimensional magnetoexcitons in a state of Bose-Einstein condensation (BEC) with wave vector k = 0 were investigated in terms of the Bogoliubov theory of quasiaverages. The starting Hamiltonian of the electrons and holes lying on the lowest Land...
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D.Ghitu Institute of Electronic Engineering and Nanotechnologies
2010
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oai:doaj.org-article:5b280e15e40442e99e475907596346a42021-11-21T12:04:10ZCollective elementary excitations of two-dimensional magnetoexcitons in the bose-einstein condensation state with wave vector k = 0 2537-63651810-648Xhttps://doaj.org/article/5b280e15e40442e99e475907596346a42010-02-01T00:00:00Zhttps://mjps.nanotech.md/archive/2010/article/4205https://doaj.org/toc/1810-648Xhttps://doaj.org/toc/2537-6365The collective elementary excitations of the two-dimensional magnetoexcitons in a state of Bose-Einstein condensation (BEC) with wave vector k = 0 were investigated in terms of the Bogoliubov theory of quasiaverages. The starting Hamiltonian of the electrons and holes lying on the lowest Landau levels (LLLs) contains the supplementary interactions due to the virtual quantum transitions of the particles to the excited Landau levels (ELLs) and return back. As a result, the interaction between the magnetoexcitons with k = 0 does not vanish and their BEC becomes stable as regards the collapse. The energy spectrum of the collective elementary excitations consists of two exciton-type branches (energy and quasienergy branches) each of them with energy gap and roton-type section, the gapless optical plasmon branch, and the acoustical plasmon branch, which reveals the absolute instability in the range of small wave vectors. Moscalenco, SveatoslavLiberman, MichaelDumanov, EvgheniRusu, SpiridonSanduleac, IonelD.Ghitu Institute of Electronic Engineering and NanotechnologiesarticlePhysicsQC1-999ElectronicsTK7800-8360ENMoldavian Journal of the Physical Sciences, Vol 9, Iss 1, Pp 16-37 (2010) |
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EN |
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Physics QC1-999 Electronics TK7800-8360 |
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Physics QC1-999 Electronics TK7800-8360 Moscalenco, Sveatoslav Liberman, Michael Dumanov, Evgheni Rusu, Spiridon Sanduleac, Ionel Collective elementary excitations of two-dimensional magnetoexcitons in the bose-einstein condensation state with wave vector k = 0 |
| description |
The collective elementary excitations of the two-dimensional magnetoexcitons in a state
of Bose-Einstein condensation (BEC) with wave vector k =
0 were investigated in terms of the
Bogoliubov theory of quasiaverages. The starting Hamiltonian of the electrons and holes lying
on the lowest Landau levels (LLLs) contains the supplementary interactions due to the virtual
quantum transitions of the particles to the excited Landau levels (ELLs) and return back. As a
result, the interaction between the magnetoexcitons with k =
0 does not vanish and their BEC
becomes stable as regards the collapse. The energy spectrum of the collective elementary excitations consists of two exciton-type branches (energy and quasienergy branches) each of them
with energy gap and roton-type section, the gapless optical plasmon branch, and the acoustical
plasmon branch, which reveals the absolute instability in the range of small wave vectors. |
| format |
article |
| author |
Moscalenco, Sveatoslav Liberman, Michael Dumanov, Evgheni Rusu, Spiridon Sanduleac, Ionel |
| author_facet |
Moscalenco, Sveatoslav Liberman, Michael Dumanov, Evgheni Rusu, Spiridon Sanduleac, Ionel |
| author_sort |
Moscalenco, Sveatoslav |
| title |
Collective elementary excitations of
two-dimensional magnetoexcitons in the
bose-einstein condensation state with wave vector k = 0 |
| title_short |
Collective elementary excitations of
two-dimensional magnetoexcitons in the
bose-einstein condensation state with wave vector k = 0 |
| title_full |
Collective elementary excitations of
two-dimensional magnetoexcitons in the
bose-einstein condensation state with wave vector k = 0 |
| title_fullStr |
Collective elementary excitations of
two-dimensional magnetoexcitons in the
bose-einstein condensation state with wave vector k = 0 |
| title_full_unstemmed |
Collective elementary excitations of
two-dimensional magnetoexcitons in the
bose-einstein condensation state with wave vector k = 0 |
| title_sort |
collective elementary excitations of
two-dimensional magnetoexcitons in the
bose-einstein condensation state with wave vector k = 0 |
| publisher |
D.Ghitu Institute of Electronic Engineering and Nanotechnologies |
| publishDate |
2010 |
| url |
https://doaj.org/article/5b280e15e40442e99e475907596346a4 |
| work_keys_str_mv |
AT moscalencosveatoslav collectiveelementaryexcitationsoftwodimensionalmagnetoexcitonsintheboseeinsteincondensationstatewithwavevectork0 AT libermanmichael collectiveelementaryexcitationsoftwodimensionalmagnetoexcitonsintheboseeinsteincondensationstatewithwavevectork0 AT dumanovevgheni collectiveelementaryexcitationsoftwodimensionalmagnetoexcitonsintheboseeinsteincondensationstatewithwavevectork0 AT rususpiridon collectiveelementaryexcitationsoftwodimensionalmagnetoexcitonsintheboseeinsteincondensationstatewithwavevectork0 AT sanduleacionel collectiveelementaryexcitationsoftwodimensionalmagnetoexcitonsintheboseeinsteincondensationstatewithwavevectork0 |
| _version_ |
1718419247108980736 |