Metallic behavior in STO/LAO heterostructures with non-uniformly atomic interfaces

Author(s):Show less -

Amoresi, Rafael A. C. ; Cichetto Jr, Leonelio ; Gouveia, Amanda F. ; Colmenares, Yormary N. ; Teodoro, Marcio D. ; Marques, Gilmar E. ; Longo, Elson ; Simoes, Alexandre Z. ; Andres, Juan ; Chiquito, Adenilson J. ; Zaghete, Maria A.

• Document type: Journal article
• Source: MATERIALS TODAY COMMUNICATIONS; v. 24, p. 10-pg., 2020-09-01.

Abstract

The search for new and low-power switching devices involving the integration of semiconductor thin films is of interest, and has led to renewed research because such devices may exhibit innovative properties. Here, we investigate the two-dimensional electron gas (2DEG) at the LaAlO3/SrTiO3 interface with metallic and insulator behavior. Insight is offered by quantifying the interface charge distribution associated with structural and electronic order-disorder effects. Variations in the electron conductivity were observed to be associated with different specific clustering arrangements of both Ti and Al cations of the co-exposed surfaces at the interface, i.e., structural and electronic connectivity among the undercoordinated [TiO5] and [AlO5] clusters. These results indicate facet control as a strategy for enhancing the electric and magnetic properties of a device via the quantum confinement of electrons. (AU)

• FAPESP's process: 17/23663-6 - Irradiation by femtosecond laser in thin films of LaNiO3 deposited by PLD for study of structural and physical properties for application in ferroelectric memories
• Grantee: Leonélio Cichetto Junior
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• FAPESP's process: 17/19143-7 - An experimental theoretical approach of conduction mechanisms and interface defects of heterostructure sensors based on P-N and N-N semiconductors from CeO2 matrices
• Grantee: Rafael Aparecido Ciola Amoresi
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 18/01914-0 - Functionalizing the optical emission in quantum tunneling nanostructures in different spectral intervals
• Grantee: Marcio Daldin Teodoro
• Support Opportunities: Regular Research Grants
• FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
• Grantee: Elson Longo da Silva
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
• FAPESP's process: 19/09296-6 - Femtosecond laser irradiation in CeO2 samples and advances in theoretical approach
• Grantee: Rafael Aparecido Ciola Amoresi
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• FAPESP's process: 14/01371-5 - Obtention of memories with LaNiO3 and LaNiO3/BaTiO3 using PLD
• Grantee: Leonélio Cichetto Junior
• Support Opportunities: Scholarships in Brazil - Post-Doctoral