ЖЭТФ, Том 126,
Вып. 4,
стр. 979 (Октябрь 2004)
(Английский перевод - JETP,
Vol. 99, No 4,
p. 850,
October 2004
доступен on-line на www.springer.com
)
COLLECTIVE EXCITATIONS IN EXCITON CRYSTAL
Kulakovskii D.V., Lozovik Yu.E., Chaplik A.V.
Поступила в редакцию: 19 Мая 2004
PACS: 71.35.Lk, 73.20.Mf
Crystal phase of indirect excitons formed by spatially separated electrons and holes in coupled quantum wells is analyzed. The collective mode spectrum of the exciton crystal at zero and nonzero magnetic fields is found. The spectrum consists of two optical and two acoustical modes (transverse and longitudinal in each case). We also study changes of the dipole crystal collective excitations at the transition exciton crystal-electron-hole plasma.
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