Author

R. C. Silva

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Preprint Oct 2026

A rigid commensurate host and a defect that switches: vacancies in the frustrated alternating spin-(1, 1/2) Heisenberg chain

The alternating spin-$(1,\tfrac12)$ Heisenberg chain with a frustrating next-nearest-neighbor coupling $J_2$ loses its Lieb--Mattis moment through a discontinuous transition to a singlet whose nature was left open. Using an SU(2)-symmetric density-matrix renormalization group, in which the total spin is a quantum-numbe...

R. C. Silva, R. C. Silva, A. R. Pereira · 0 citations

Preprint Sep 2026

Collective depinning of dipolar skyrmion chains: thermal and athermal rounding of an elastic polymer in a quenched landscape

The dynamics of interacting dipole skyrmion chains in a weak pinning landscape is studied through numerical solutions of the stochastic Thiele equation. Chains of different lengths with periodic boundary conditions are driven across quenched attractive pinning sites under different magnetic fields. A clear threshold sp...

R. C. Silva, R. C. Silva, R. Stamps · 0 citations