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Spontaneous decays of magneto-elastic excitations in non-collinear antiferromagnet (Y,Lu)MnO3
- Source :
- Nature Communications, Nature Communications, Vol 7, Iss 1, Pp 1-6 (2016), Nature communications, vol 7, iss 1, NATURE COMMUNICATIONS(7), Oh, J; Le, MD; Nahm, HH; Sim, H; Jeong, J; Perring, TG; et al.(2016). Spontaneous decays of magneto-elastic excitations in non-collinear antiferromagnet (Y,Lu)MnO3. Nature Communications, 7, 13146. doi: 10.1038/ncomms13146. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/7jj9m09b
- Publication Year :
- 2016
- Publisher :
- Nature Publishing Group, 2016.
-
Abstract
- Magnons and phonons are fundamental quasiparticles in a solid and can be coupled together to form a hybrid quasi-particle. However, detailed experimental studies on the underlying Hamiltonian of this particle are rare for actual materials. Moreover, the anharmonicity of such magnetoelastic excitations remains largely unexplored, although it is essential for a proper understanding of their diverse thermodynamic behaviour and intrinsic zero-temperature decay. Here we show that in non-collinear antiferromagnets, a strong magnon–phonon coupling can significantly enhance the anharmonicity, resulting in the creation of magnetoelastic excitations and their spontaneous decay. By measuring the spin waves over the full Brillouin zone and carrying out anharmonic spin wave calculations using a Hamiltonian with an explicit magnon–phonon coupling, we have identified a hybrid magnetoelastic mode in (Y,Lu)MnO3 and quantified its decay rate and the exchange-striction coupling term required to produce it.<br />The properties of magnetic, crystalline solids can be described in terms of quantum particles of spin-wave and lattice-vibration energy, known as magnons and phonons respectively. Here, the authors show that strong magnon-phonon coupling in a noncollinear antiferromagnet can create magnetoelastic excitations.
- Subjects :
- Phonon
Science
FOS: Physical sciences
General Physics and Astronomy
02 engineering and technology
01 natural sciences
General Biochemistry, Genetics and Molecular Biology
Article
symbols.namesake
Condensed Matter::Materials Science
Spin wave
0103 physical sciences
Antiferromagnetism
010306 general physics
Computer Science::Databases
Physics
Condensed Matter - Materials Science
Multidisciplinary
Condensed matter physics
Magnon
Anharmonicity
Materials Science (cond-mat.mtrl-sci)
General Chemistry
021001 nanoscience & nanotechnology
cond-mat.mtrl-sci
Brillouin zone
symbols
Quasiparticle
Condensed Matter::Strongly Correlated Electrons
0210 nano-technology
Hamiltonian (quantum mechanics)
Subjects
Details
- Language :
- English
- ISSN :
- 20411723
- Volume :
- 7
- Database :
- OpenAIRE
- Journal :
- Nature Communications
- Accession number :
- edsair.doi.dedup.....efbefcc358956b67bf6fd39b55f74f81