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@article{1374452,
author = {YazdiandRizi, M. and Maršík, Přemysl and Mallett, B. P. P. and Dubroka, Adam and Christensen, D. V. and Chen, Y. Z. and Pryds, N. and Bernhard, Christian},
article_location = {MULHOUSE},
article_number = {4},
doi = {http://dx.doi.org/10.1209/0295-5075/113/47005},
keywords = {nfrared ellipsometry; Al2O3/SrTiO3 heterostructure},
language = {eng},
issn = {0295-5075},
journal = {EPL},
title = {Infrared ellipsometry study of the confined electrons in a high-mobility gamma-Al2O3/SrTiO3 heterostructure},
volume = {113},
year = {2016}
}
TY - JOUR
ID - 1374452
AU - Yazdi-Rizi, M. - Maršík, Přemysl - Mallett, B. P. P. - Dubroka, Adam - Christensen, D. V. - Chen, Y. Z. - Pryds, N. - Bernhard, Christian
PY - 2016
TI - Infrared ellipsometry study of the confined electrons in a high-mobility gamma-Al2O3/SrTiO3 heterostructure
JF - EPL
VL - 113
IS - 4
SP - "nestrankovano"
EP - "nestrankovano"
PB - EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY
SN - 02955075
KW - nfrared ellipsometry
KW - Al2O3/SrTiO3 heterostructure
N2 - With infrared ellipsometry we studied the response of the confined electrons in gamma-Al2O3/SrTiO3 (GAO/STO) heterostructures in which they originate predominantly from oxygen vacancies. From the analysis of a so-called Berreman mode, that develops near the highest longitudinal optical phonon mode of SrTiO3, we derive the sheet carrier density, N-s, the mobility, mu, and the depth profile of the carrier concentration. Notably, we find that N-s and the shape of the depth profile are similar as in LaAlO3/SrTiO3 (LAO/STO) heterostructures for which the itinerant carriers are believed to arise from a polar discontinuity. Despite an order of magnitude higher mobility in GAO/STO, as obtained from transport measurements, the derived mobility in the infrared range exhibits only a twofold increase. We interpret this finding in terms of the polaronic nature of the confined charge carriers in GAO/STO and LAO/STO which leads to a strong, frequency-dependent interaction with the STO phonons. Copyright (C) EPLA, 2016
ER -
YAZDI-RIZI, M., Přemysl MARŠÍK, B. P. P. MALLETT, Adam DUBROKA, D. V. CHRISTENSEN, Y. Z. CHEN, N. PRYDS a Christian BERNHARD. Infrared ellipsometry study of the confined electrons in a high-mobility gamma-Al2O3/SrTiO3 heterostructure. Online. \textit{EPL}. MULHOUSE: EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY, 2016, roč.~113, č.~4, s.~''nestrankovano'', 6 s. ISSN~0295-5075. Dostupné z: https://dx.doi.org/10.1209/0295-5075/113/47005. [citováno 2024-04-23]
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