ICTS:29182

Video URL

CT - Two Dimensional Electron Gas at LVO/KTO Interface

CT - Two Dimensional Electron Gas at LVO/KTO Interface

(2024). CT - Two Dimensional Electron Gas at LVO/KTO Interface . SciVideos. https://youtube.com/live/xQbCDpOvMJ8

CT - Two Dimensional Electron Gas at LVO/KTO Interface . SciVideos, Jul. 24, 2024, https://youtube.com/live/xQbCDpOvMJ8 

          @misc{ scivideos_ICTS:29182,
            doi = {},
            url = {https://youtube.com/live/xQbCDpOvMJ8},
            author = {},
            keywords = {},
            language = {en},
            title = {CT - Two Dimensional Electron Gas at LVO/KTO Interface },
            publisher = {},
            year = {2024},
            month = {jul},
            note = {ICTS:29182 see, \url{https://scivideos.org/icts-tifr/29182}}
          }
Arpan Das
Talk numberICTS:29182
Source RepositoryICTS-TIFR
Source EventEngineered 2D Quantum Materials
Collection

Abstract

We have studied 2DEG formed at the interface of two oxide perovskite insulators; one is LaVO3 (LVO) which is a Mott insulator and another one is KTaO3 (KTO) which is a band insulator. Our experimental collaborators in the group of Prof. Suvankar Chakraverty from INST, Mohali have created LVO/KTO interface for the first time and observed metallic behaviour at this interface with one order of magnitude higher electron density and very high mobility of the 2DEG. The reason for 2DEG formation at the interface of two insulators/semiconductors was not clear. Our DFT calculations showed that LVO and KTO bulk materials are insulating, but the LVO/KTO interface is metallic which is an emergent phenomena and existence of parabolic bands crossing the Fermi level indicates source of free electrons at the interface. In this LVO/KTO heterostructure, both the individual parts are polar, consisting of alternating charged layers. Our DFT calculations show, to avoid polar catastrophe, “electronic recons...