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Field-induced decays in XXZ triangular-lattice antiferromagnets
- Source :
- Physical Review B: Condensed Matter and Materials Physics (1998-2015), Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2016, 94 (14), pp.140407. ⟨10.1103/PhysRevB.94.140407⟩, Maksimov, PA; Zhitomirsky, ME; & Chernyshev, AL. (2016). Field-induced decays in XXZ triangular-lattice antiferromagnets. Physical Review B, 94(14), 140407. doi: 10.1103/PhysRevB.94.140407. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/2b96f2bw, Physical Review B, vol 94, iss 14, Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2016, 94 (14), pp.140407. ⟨10.1103/PhysRevB.94.140407⟩
- Publication Year :
- 2016
- Publisher :
- HAL CCSD, 2016.
-
Abstract
- We investigate field-induced transformations in the dynamical response of the $XXZ$ model on the triangular lattice that are associated with the anharmonic magnon coupling and decay phenomena. A set of concrete theoretical predictions is made for a close physical realization of the spin-1/2 $XXZ$ model, Ba$_3$CoSb$_2$O$_9$. We demonstrate that dramatic modifications in magnon spectrum must occur in low out-of-plane fields that are easily achievable for this material. The hallmark of the effect is a coexistence of the clearly distinct well-defined magnon excitations with significantly broadened ones in different regions of the ${\bf k}-\omega$ space. The field-induced decays are generic for this class of models and become more prominent at larger anisotropies and in higher fields.<br />Comment: 5 p. + 4 figs main, 6+ p. + 8 figs Supp, typos corrected, Sqw replotted, few changes
- Subjects :
- Field (physics)
Fluids & Plasmas
FOS: Physical sciences
02 engineering and technology
Space (mathematics)
01 natural sciences
Omega
Condensed Matter - Strongly Correlated Electrons
Engineering
Quantum mechanics
0103 physical sciences
Hexagonal lattice
010306 general physics
Physics
Strongly Correlated Electrons (cond-mat.str-el)
Condensed matter physics
Magnon
Anharmonicity
021001 nanoscience & nanotechnology
Coupling (probability)
3. Good health
Physical Sciences
Chemical Sciences
Condensed Matter::Strongly Correlated Electrons
cond-mat.str-el
[PHYS.COND.CM-SCE]Physics [physics]/Condensed Matter [cond-mat]/Strongly Correlated Electrons [cond-mat.str-el]
0210 nano-technology
Realization (systems)
Subjects
Details
- Language :
- English
- ISSN :
- 10980121 and 1550235X
- Database :
- OpenAIRE
- Journal :
- Physical Review B: Condensed Matter and Materials Physics (1998-2015), Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2016, 94 (14), pp.140407. ⟨10.1103/PhysRevB.94.140407⟩, Maksimov, PA; Zhitomirsky, ME; & Chernyshev, AL. (2016). Field-induced decays in XXZ triangular-lattice antiferromagnets. Physical Review B, 94(14), 140407. doi: 10.1103/PhysRevB.94.140407. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/2b96f2bw, Physical Review B, vol 94, iss 14, Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2016, 94 (14), pp.140407. ⟨10.1103/PhysRevB.94.140407⟩
- Accession number :
- edsair.doi.dedup.....7e766aea6cfe36dd31b104deac6e21fc