3 papers
cond-mat.str-el2025
Spin-singlet dimer phase in a frustrated square lattice under a magnetic field
L. M. Ramos, M. Schmidt, F. M. Zimmer
We investigated the isotropic spin-1/2 Heisenberg model on an anisotropic square lattice with competing exchange interactions, motivated by the unconventional magnetic behavior obs…
cond-mat.str-el2025
Interplay of frustration and quantum fluctuations in a spin-1/2 anisotropic square lattice
L. M. Ramos, F. M. Zimmer, M. Schmidt
Motivated by theoretical and experimental studies reported by Yamaguchi et al. (Phys. Rev. B 98, 094402 (2018)), we performed a cluster mean-field analysis of an anisotropic Heisen…
cond-mat.stat-mech2024
Conformally invariant free parafermionic quantum chains with multispin interactions
Francisco C. Alcaraz, Lucas M. Ramos
We calculated the spectral properties of two related families of non-Hermitian free-particle quantum chains with -multispin interactions (). The first family have…