Please use this identifier to cite or link to this item: http://hdl.handle.net/2080/3945
Title: Linear and Cubic Rashba in KTaO3/LaAlO3 (0 0 1) Heterostructure
Authors: Bhattacharya, Sanchari
Datta, Sanjoy
Keywords: KTaO3
LaAlO3
Cubic Rashba
Linear
Heterostructure
Issue Date: Jan-2023
Citation: 21th International Workshop on Computational Physics and Materials Science: Total Energy and Force Methods, ICTP, Trieste, Italy, 11-13 January 2023
Abstract: The LaAlO3/KTaO3 system serves as a prototype to study the electronic properties that emerge as a result of spin-orbit coupling. In this article, we have used first-principles calculations to systematically study two types of defect-free (0 0 1) interfaces, which are termed as n-type and p-type. While the n-type heterostructure produces a two dimensional electron gas, the p-type heterostructure hosts an oxygen-rich two dimensional hole gas at the interface. Furthermore, in the presence of intrinsic spin-orbit coupling, we have found evidence of both cubic and linear Rashba interactions in the conduction bands of the n-type heterostructure. On the contrary, there is spin-splitting of both the valence and the conduction bands in the p-type interface, which are found to be only linear Rashba type. Interestingly, the p-type interface also harbours a potential photocurrent transition path, making it an excellent platform to study the circularly polarized photogalvanic effect.
Description: Copyright belongs to proceeding publisher
URI: http://hdl.handle.net/2080/3945
Appears in Collections:Conference Papers

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