Low-energy excitations in multiple modulation-doped CdTe/(CdMg)Te quantum wells
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F25%3A10512400" target="_blank" >RIV/00216208:11320/25:10512400 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=v-G66awYcA" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=v-G66awYcA</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevB.111.125414" target="_blank" >10.1103/PhysRevB.111.125414</a>
Alternative languages
Result language
angličtina
Original language name
Low-energy excitations in multiple modulation-doped CdTe/(CdMg)Te quantum wells
Original language description
Low-energy excitations of a two-dimensional electron gas (2DEG) in modulation-doped multiple (ten) quantum wells (QWs) was studied using far-infrared magnetotransmission technique at liquid helium temperatures. A large distance between neighboring QWs of 54 nm excluded a direct interaction of electron wave functions confined in the wells. In four samples which differed in the spacer width and the level of doping with iodine donors, supplied with a metallic grid coupler, a uniform picture of excitations of the 2DEG was observed. These involved the cyclotron resonance (CR), its second harmonic (2CR), and magnetoplasmon modes (MPMs). MPMs with a small amplitude originated from excitations of the 2DEG in a single QW and these with a high amplitude resulted from a coherent excitation of the 2DEG in all wells. A polaron effect resulting from the interaction of the CR, 2CR, and MPMs with an optical phonon was observed and described with appropriate models. Both types of MPMs exhibited gaps in the disperion relations at the frequency close to the 2CR, leading to Bernstein modes, which was described with an appropriate (nonlocal) theoretical model.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review B
ISSN
2469-9950
e-ISSN
2469-9969
Volume of the periodical
111
Issue of the periodical within the volume
12
Country of publishing house
US - UNITED STATES
Number of pages
10
Pages from-to
125414
UT code for WoS article
001516175300008
EID of the result in the Scopus database
2-s2.0-105000436083