Zobrazeno 1 - 10
of 223
pro vyhledávání: '"Cabra, D."'
We study a one-dimensional antiferromagnetic-elastic model with magnetic ions having spin $S=3/2$. By extensive DMRG computations and complementary analytical methods, we uncover a first-order transition from a homogeneous or weakly-dimerized phase (
Externí odkaz:
http://arxiv.org/abs/2409.13446
Engineering non trivial topological phases in materials, specially skyrmion-like arrangements, has been of great interest in the last decade due to its potential technological applications. In this work, we study a model of electrons coupled to a mag
Externí odkaz:
http://arxiv.org/abs/2201.06668
We present a simple two-dimensional model in which the lattice degrees of freedom mediate the interactions between magnetic moments and electric dipoles. This model reproduces basic features, such as a sudden electric polarization switch-off when a m
Externí odkaz:
http://arxiv.org/abs/2111.06765
We discuss a model scenario for multiferroic systems of type II (collinear spins) where the electric dipolar order competes with a frustrated magnetic order in determining the elastic distortions of the lattice ion positions. High magnetic frustratio
Externí odkaz:
http://arxiv.org/abs/2111.04896
Autor:
Guratinder, K., Schmidt, M., Walker, H. C., Bewley, R., Wörle, M., Cabra, D., Osorio, S. A., Villalba, M., Madsen, A. K., Keller, L., Wildes, A., Puphal, P., Cervellino, A., Rüegg, Ch., Zaharko, O.
The crystal structure and magnetic correlations in triangular antiferromagnet FeGa$_2$S$_4$ are studied by x-ray diffraction, magnetic susceptibility, neutron diffraction and neutron inelastic scattering. We report significant mixing at the cation si
Externí odkaz:
http://arxiv.org/abs/2107.06904
Publikováno v:
Phys. Rev. B 103, 144421 (2021)
We introduce a microscopic model for collinear multiferroics capable to reproduce, as a consequence of magnetic frustration and easy-axis anisotropy, the so-called "uudd" (or antiphase) magnetic ordering observed in several type II multiferroic mater
Externí odkaz:
http://arxiv.org/abs/2012.15711
Publikováno v:
Phys. Rev. B 102, 014441 (2020)
A key concept in the emerging field of spintronics is the electric field control of spin precession via the effective magnetic field generated by the Rashba spin orbit interaction (RSOI). Here, by extensive Density Matrix Renormalization Group comput
Externí odkaz:
http://arxiv.org/abs/2004.06160
Publikováno v:
Phys. Rev. B 100, 161111 (2019)
We propose a microscopic magneto-electric model in which the coupling between spins and electric dipoles is mediated by lattice distortions. The magnetic sector is described by a spin S=1/2 Heisenberg model coupled directly to the lattice via a stand
Externí odkaz:
http://arxiv.org/abs/1908.00312
Publikováno v:
Phys. Rev. B 100, 245106 (2019)
We study the effects of an in-plane Dzyaloshinskii-Moriya interaction under an external magnetic field in the highly frustrated kagome antiferromagnet. We focus on the low-temperature phase diagram, which we obtain through extensive Monte-Carlo simul
Externí odkaz:
http://arxiv.org/abs/1907.01982
Publikováno v:
Phys. Rev. B 100, 220404 (2019)
Swirling topological spin configurations, known as magnetic skyrmions, are known to be stabilised in chiral ferromagnets with Dzyaloshinskii-Moriya interaction (DMI). In particular, for appropriate values of the external magnetic field they appear in
Externí odkaz:
http://arxiv.org/abs/1906.12343