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Growth and Electrostatic/chemical Properties of Metal/LaAlO3/SrTiO3 Heterostructures

Growth and Electrostatic/chemical Properties of Metal/LaAlO₃/SrTiO₃ Heterostructures

Published on: February 8, 2018

V2O3(0001) surface termination: phase equilibrium.

A J Window¹, A Hentz, D C Sheppard

¹Physics Department, University of Warwick, Coventry, United Kingdom.

Physical Review Letters

|July 30, 2011

Summary

This summary is machine-generated.

Surface studies of vanadium oxide films reveal a reconstructed VO(2) surface trilayer. This finding contrasts with prior research suggesting a vanadyl species termination on the V(2)O(3) surface.

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Area of Science:

Surface Science
Materials Science
Thin Film Growth

Background:

Vanadium sesquioxide (V(2)O(3)) exhibits complex surface reconstructions.
Understanding surface termination is crucial for V(2)O(3) film properties.

Purpose of the Study:

To investigate the surface structure of V(2)O(3) films grown on different substrates.
To determine the precise atomic arrangement of the V(2)O(3) surface termination.

Main Methods:

Utilized complementary medium-energy ion scattering (MEIS) and low-energy ion scattering (LEIS) techniques.
Studied V(2)O(3) films epitaxially grown on Pd(111), Au(111), and Cu(3)Au(100) substrates.

Main Results:

Identified a reconstructed full O(3)-layer termination on the V(2)O(3) (0001) surface.
This reconstruction forms a stable VO(2) surface trilayer structure.
Results align with thermodynamic equilibrium models for surface growth.

Conclusions:

The V(2)O(3) surface is terminated by a VO(2) trilayer, not a vanadyl monolayer.
This finding resolves previous discrepancies regarding V(2)O(3) surface structure.