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http://hdl.handle.net/2080/3806
Title: | Emergent Phenomena in KTaO3/SrTiO3 Heterostructue |
Authors: | Bhattacharya, Sanchari Jena, Soumyasree Datta, Sanjoy |
Keywords: | KTaO3h SrTiO3 Heterostructure |
Issue Date: | Oct-2022 |
Citation: | Conference on Emergent phenomena in Quantum MATerials (E-QMAT), IIT Roorkee,12-14 October 2022 |
Abstract: | KTaO3 has become a new material of attraction for exploring various exotic properties at its surface and interfaces. To explore the substrate effect of KTaO3, we have studied a new heterostructure made by KTaO3 and SrTiO3. KTaO3 is a 5d polar perovskite with the complementary planes of KO− and TaO+ 2, whereas SrTiO3 is a 3d non-polar perovskite with alternative stacking SrO0 and TiO0 2. By taking the epitaxial layers of SrTiO3 on top of KTaO3, we have created two different interfaces along (0 0 1), which are KO−/TiO0 2 and TaO+ 2/SrO0. We have studied these two interfaces by using density functional theory. In KO−/TiO0 2 interface, the signature of two-dimensional hole gas (2DHG) has been found. Though the interface turns to insulator when epitaxial layers reach beyond 4.5 u.c. The other one, i.e., TaO+ 2/SrO0 interface, shows the typical behaviour of two-dimensional electron gas (2DEG), only at the epitaxial layer 2.5 uc. The presence of both types of carriers in a single system for different kinds of interfaces has great use in various device applications |
Description: | Copyright belongs to proceeding publisher |
URI: | http://hdl.handle.net/2080/3806 |
Appears in Collections: | Conference Papers |
Files in This Item:
File | Description | Size | Format | |
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2022_EQMAT_SBhattacharya_Emergent.pdf | 1.98 MB | Adobe PDF | View/Open |
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