We have successfully grown centimeter-sized layered [Formula: see text] single crystals under high oxygen pressures of 120-150 bar by the floating zone technique. This enabled us to perform neutron scattering experiments where we observe close to quarter-integer magnetic peaks below [Formula: see text] that are accompanied by steep upwards dispersing spin excitations. Within the high-frequency Ni-O bond stretching phonon dispersion, a softening at the propagation vector for a checkerboard modulation can be observed. We were able to simulate the magnetic excitation spectra using a model that includes two essential ingredients, namely checkerboard charge disproportionation and nano phase separation. The results thus suggest that charge disproportionation is preferred instead of a Jahn-Teller distortion even for this layered [Formula: see text] system.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7582202 | PMC |
| http://dx.doi.org/10.1038/s41598-020-74884-2 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Designing a 2D van der Waals oxide with lone-pair electrons as chemical scissor.
Natl Sci Rev
January 2025
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China.
Two-dimensional (2D) van der Waals (vdW) materials are known for their intriguing physical properties, but their rational design and synthesis remain a great challenge for chemists. In this work, we successfully synthesized a new non-centrosymmetric oxide, i.e.
View Article and Find Full Text PDFC-parameter version of robust bounded one-class support vector classification.
Sci Rep
January 2025
College of Mathematics and Systems Science, Xinjiang University, Urumqi , 830046, China.
ν-one-class support vector classification (ν-OCSVC) has garnered significant attention for its remarkable performance in handling single-class classification and anomaly detection. Nonetheless, the model does not yield a unique decision boundary, and potentially compromises learning performance when the training data is contaminated by some outliers or mislabeled observations. This paper presents a novel C-parameter version of bounded one-class support vector classification (C-BOCSVC) to determine a unique decision boundary.
View Article and Find Full Text PDFBathymetry estimation for coastal regions using self-attention.
Sci Rep
January 2025
Department of Civil and Environmental Engineering, Khalifa University of Science and Technology, Abu Dhabi, UAE.
Bathymetric mapping of the coastal area is essential for coastal development and management. However, conventional bathymetric measurement in coastal areas is resource-expensive and under many constraints. Various research have been conducted to improve the efficiency or effectiveness of bathymetric estimations.
View Article and Find Full Text PDFIn subclinical AF, apixaban vs. aspirin reduced stroke or systemic embolism at 3.5 y, regardless of duration of recent subclinical AF episodes.
Ann Intern Med
January 2025
University of Michigan, Ann Arbor, Michigan, USA (E.R.B.).
GIM/FP/GP: [Formula: see text] Cardiology: [Formula: see text].
View Article and Find Full Text PDFIn T1D, weekly efsitora was noninferior to daily degludec for reducing HbA but increased severe hypoglycemia at 26 wk.
Ann Intern Med
January 2025
Mayo Clinic, Rochester, Minnesota, USA (F.L., M.R.G., V.M.M.).
Endocrinology: [Formula: see text].
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!