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. 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. |
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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. \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.
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