Alleviating polarity-conflict at the heterointerfaces of KTaO₃/GdScO₃ polar complex-oxides
Thompson, J. · Hwang, J. · Nichols, J. · Connell, J. G. · Stemmer, S. · Seo, S. S. A.
Original · EN
We have synthesized and investigated the heterointerfaces of KTaO₃ (KTO) and GdScO₃ (GSO), which are both polar complex-oxides along the pseudo-cubic [001] direction. Since their layers have the same, conflicting net charges at interfaces, i.e. KO(-1)/ScO₂(-1) or TaO₂(+1)/GdO(+1), forming the heterointerface of KTO/GSO should be forbidden due to strong Coulomb repulsion, the so-called polarity conflict. However, we have discovered that atomic reconstruction occurs at the heterointerfaces between KTO thin-films and GSO substrates, which effectively alleviates the polarity conflict without destroying the hetero-epitaxy. Our result demonstrates one of the important ways to create artificial heterostructures from polar complex-oxides.
English translation
This paper has no Arabic translation yet. Be the first: it takes a few seconds, and the result is stored for every future reader.