INVESTIGADORES
ARLEGO Marcelo Jose Fabian
artículos
Título:
Resonances in a dilute gas of magnons and metamagnetism of isotropic frustrated ferromagnetic spin chains
Autor/es:
ARLEGO MARCELO; HEIDRICH-MEISNER FABIAN; HONECKER ANDREAS; ROSSINI GERARDO; VEKUA TEMOURAZ
Revista:
PHYSICAL REVIEW B - CONDENSED MATTER AND MATERIALS PHYSICS
Editorial:
American Physical Society
Referencias:
Año: 2011 vol. 84 p. 224409 - 224420
ISSN:
0163-1829
Resumen:
We show that spin-S chains with SU(2)-symmetric, ferromagnetic nearest-neighbor and frustrating antiferromagnetic next-nearest-neighbor exchange interactions exhibit metamagnetic behavior under the influence of an external magnetic field for small S, in the form of a first-order transition to the fully polarized state. The corresponding magnetization jump increases gradually starting from an S-dependent critical value of exchange couplings and takes a maximum in the vicinity of a ferromagnetic Lifshitz point. The metamagnetism results from resonances in the dilute magnon gas caused by an interplay between quantum fluctuations and frustration.
