Bulk-like d band of SrVO3 under a self-protective cap layer

TL;DR

This study uses angle-resolved photoemission spectroscopy to investigate the bulk electronic structure of SrVO3 thin films with a protective cap layer, revealing dispersive V 3d bands consistent with theoretical models.

Contribution

It provides detailed experimental insights into the bulk electronic states of SrVO3, demonstrating the effectiveness of a protective cap layer in surface-sensitive measurements.

Findings

Observation of dispersive bulk V 3d bands

Agreement with dynamical mean-field theory calculations

Enhanced spectral weight of incoherent states within the Fermi surface

Abstract

We have performed a detailed angel-resolved photoemission spectroscopy study of in-situ prepared SrVO3 thin films. Naturally capped by a ``transparent'' protective layer, contributions from surface states centered at ~ -1.5 eV are dramatically reduced, enabling us to study the bulk V 3d states. We have observed a clear band dispersion not only in the coherent quasiparticle part but also in the incoherent part, which are reproduced by dynamical mean-field theory calculations and the spectral weight of the incoherent part is stronger within the Fermi surface.