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Author

Daniel D. Rivera

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2 papers indexed here

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Oct 2026

Magnetoelectric paramagnets: exchange-driven s-wave spin splitting in compensated magnets.

In conventional antiferromagnets, local electric environments remain equivalent and combined inversion and time-reversal PT symmetry enforces spin-degenerate bands, whereas altermagnets and related compensated phases realize this inequivalence as long-range order electric environments. Materials with zero net magnetiza...

Daniel D. Rivera, G. M. Dalpian, Carlos Mera Acosta · 0 citations
Preprint Sep 2026

Ni-O hybridization as a stabilizer for $s^{\pm}$ superconductivity in La$_3$Ni$_2$O$_7$: a DFT+RPA study

The superconducting gap symmetry of high-pressure bilayer nickelates remains under debate, with weak- and strong-coupling approaches yielding different pairing tendencies. In this work, we investigate how the weak-coupling treatment of electronic states away from the Fermi level influences magnetic fluctuations and sup...

Lauro B. Braz, Daniel D. Rivera, Emmanuel V. C. Lopes et al. · 0 citations

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