Charge and Spin Order Dichotomy in NdNiO2 Driven by the Capping Layer
Journal article, 2022

Superconductivity in infinite-layer nickelates holds exciting analogies with that of cuprates, with similar structures and 3d-electron count. Using resonant inelastic x-ray scattering, we studied electronic and magnetic excitations and charge density correlations in Nd1-xSrxNiO2 thin films with and without an SrTiO3 capping layer. We observe dispersing magnons only in the capped samples, progressively dampened at higher doping. We detect an elastic resonant scattering peak in the uncapped x=0 compound at wave vector (∼⅓,0), remindful of the charge order signal in hole doped cuprates. The peak weakens at x=0.05 and disappears in the superconducting x=0.20 film. The role of the capping on the electronic reconstruction far from the interface remains to be understood.

Author

G. Krieger

University of Strasbourg

L. Martinelli

Polytechnic University of Milan

S. W. Zeng

National University of Singapore (NUS)

L. E. Chow

National University of Singapore (NUS)

Kurt Kummer

European Synchrotron Radiation Facility (ESRF)

Riccardo Arpaia

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Marco Moretti Sala

Polytechnic University of Milan

Nicholas B. Brookes

European Synchrotron Radiation Facility (ESRF)

A. Ariando

National University of Singapore (NUS)

N. Viart

University of Strasbourg

Marco Salluzzo

CNR - SuPerconducting and other INnovative materials and devices institute, Napoli

Giacomo Ghiringhelli

Polytechnic University of Milan

D. Preziosi

University of Strasbourg

Physical Review Letters

0031-9007 (ISSN) 1079-7114 (eISSN)

Vol. 129 2 027002

Subject Categories

Inorganic Chemistry

Atom and Molecular Physics and Optics

Condensed Matter Physics

DOI

10.1103/PhysRevLett.129.027002

PubMed

35867432

More information

Latest update

8/8/2022 8