Employing X-ray magnetic circular dichroism (XMCD), angle-resolved photoemission spectroscopy (ARPES), and momentum-resolved density fluctuation (MRDF) theory, the magnetic and electronic properties of ultrathin NdNiO (NNO) film in proximity to ferromagnetic (FM) La Sr MnO (LSMO) layer are investigated. The experimental data shows the direct magnetic coupling between the nickelate film and the manganite layer which causes an unusual ferromagnetic (FM) phase in NNO. Moreover, it is shown the metal-insulator transition in the NNO layer, identified by an abrupt suppression of ARPES spectral weight near the Fermi level (E ), is absent. This observation suggests that the insulating AFM ground state is quenched in proximity to the FM layer. Combining the experimental data (XMCD and AREPS) with the momentum-resolved density fluctuation calculation (MRDF) reveals a direct link between the MIT and the magnetic orders in NNO systems. This work demonstrates that the proximity layer order can be broadly used to modify physical properties and enrich the phase diagram of RENiO (RE = rare-earth element).
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8498901 | PMC |
| http://dx.doi.org/10.1002/advs.202101516 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Rationalization of the light-induced electron injection mechanism in a model 1D ZnO nanowire-dye complex: insights from real-time TD-DFTB simulations.
Nanoscale
November 2024
Instituto Interdisciplinario de Ciencias Básicas (ICB-CONICET), Universidad Nacional de Cuyo, Mendoza 5502, Argentina.
Zinc oxide nanowires (ZnO NWs) possess a unique one-dimensional (1D) morphology that offers a direct pathway for charge transport. In this article, we present the first application of the real-time time-dependent density functional tight-binding (real-time TD-DFTB) method for a model hybrid system consisting of a catechol molecule adsorbed on a ZnO nanowire. The rationalization of the photoinduced electron injection to the 1D nanostructure is attained through quantum dynamics simulations, stressing the role of charge transfer in the new optical transitions upon dye adsorption.
View Article and Find Full Text PDFElectrically Controlled All-Antiferromagnetic Tunnel Junctions on Silicon with Large Room-Temperature Magnetoresistance.
Adv Mater
June 2024
Department of Electrical and Computer Engineering, Northwestern University, Evanston, IL, 60208, USA.
Antiferromagnetic (AFM) materials are a pathway to spintronic memory and computing devices with unprecedented speed, energy efficiency, and bit density. Realizing this potential requires AFM devices with simultaneous electrical writing and reading of information, which are also compatible with established silicon-based manufacturing. Recent experiments have shown tunneling magnetoresistance (TMR) readout in epitaxial AFM tunnel junctions.
View Article and Find Full Text PDFGaN atomic electric fields from a segmented STEM detector: Experiment and simulation.
J Microsc
August 2024
Institute of Solid State Physics, University of Bremen, Bremen, Germany.
Atomic electric fields in a thin GaN sample are measured with the centre-of-mass approach in 4D-scanning transmission electron microscopy (4D-STEM) using a 12-segmented STEM detector in a Spectra 300 microscope. The electric fields, charge density and potential are compared to simulations and an experimental measurement using a pixelated 4D-STEM detector. The segmented detector benefits from a high recording speed, which enables measurements at low radiation doses.
View Article and Find Full Text PDFSoft x-ray photoelectron momentum microscope for multimodal valence band stereography.
Rev Sci Instrum
August 2023
SANKEN, Osaka University, Ibaraki, Osaka 567-0047, Japan.
Article Synopsis
- The photoelectron momentum microscope (PMM) at BL6U creates a new method for μm-scale momentum-resolved photoelectron spectroscopy, significantly reducing radiation damage by projecting photoelectron data onto a 2D detector.
- This technique enables detailed 3D measurements of valence band structures and can analyze variations based on factors like photon energy, polarization, detection position, and temperature.
- The study showcases examples, including band structure visualization of Ir thin films, detailed measurements of Au(111) surface states, and the effects of temperature on valence band dispersion in 1T-TaS2, while comparing the benefits of different PMMs for these applications.
Pines' demon observed as a 3D acoustic plasmon in SrRuO.
Nature
September 2023
Department of Physics and Materials Research Laboratory, University of Illinois, Urbana, IL, USA.
The characteristic excitation of a metal is its plasmon, which is a quantized collective oscillation of its electron density. In 1956, David Pines predicted that a distinct type of plasmon, dubbed a 'demon', could exist in three-dimensional (3D) metals containing more than one species of charge carrier. Consisting of out-of-phase movement of electrons in different bands, demons are acoustic, electrically neutral and do not couple to light, so have never been detected in an equilibrium, 3D metal.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!