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Tuning electronic reconstructions at the cuprate-manganite interface

DOI: 10.1103/PhysRevMaterials.3.094406 DOI Help

Authors: C. Schlueter (Diamond Light Source; Deutsches Elektronen-Synchrotron DESY) , C. Aruta (CNR-SPIN, c/o Università di Roma Tor Vergata) , N. Yang (ShanghaiTech University) , A. Tebano (National Research Council CNR-SPIN, University of Roma Tor Vergata) , D. Di Castro (CNR-SPIN, c/o Università di Roma Tor Vergata; Università di Roma Tor Vergata Via del Politecnico) , G. Balestrino (CNR-SPIN, c/o Università di Roma Tor Vergata; Università di Roma Tor Vergata Via del Politecnico) , T.-l. Lee (Diamond Light Source)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review Materials , VOL 3

State: Published (Approved)
Published: September 2019

Abstract: The electronic properties of CaCuO 2 / La 0.7 Sr 0.3 MnO 3 (LSMO) superlattices are determined by the electronic structure of the structural units and in particular their interfaces. The electronic structure of LSMO is governed by a metal-insulator transition, which is controlled by the thickness of the units and the sample temperature, resulting in a systematic downward band shift for metallic samples (i.e., thick LSMO units, low temperature). We present a systematic study of the changes in the valence-band structure and screening features in Mn 2 p and Cu 2 p core-level spectra. The results show that hybridization of Cu 3 d orbitals with out-of-plane O 2 p orbitals can be systematically tuned by controlling the band alignment at the interface via the metal-to-insulator transition of the LSMO units. This opens a new route to rational design of functional interfaces and control of orbital reconstructions.

Subject Areas: Physics, Materials, Chemistry

Instruments: I09-Surface and Interface Structural Analysis