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Highly Dispersive Scattering from Defects in Noncollinear Magnets
- Source :
- Physical Review Letters. 110
- Publication Year :
- 2013
- Publisher :
- American Physical Society (APS), 2013.
-
Abstract
- We demonstrate that point-like defects in non-collinear magnets give rise to a highly dispersive structure in the magnon scattering, violating a standard paradigm of its momentum independence. For a single impurity spin coupled to a prototypical non-collinear antiferromagnet we find that the resolvent is dominated by a distinct dispersive structure with its momentum-dependence set by the magnon dispersion and shifted by the ordering vector. This feature is a consequence of umklapp scattering off the impurity-induced spin texture, which arises due to the non-collinear ground state of the host system. Detailed results for the staggered and uniform magnetization of this texture as well as the T-matrix from numerical linear spin-wave theory are presented.<br />5+5 pages, 4+5 figs
- Subjects :
- Physics
Strongly Correlated Electrons (cond-mat.str-el)
Statistical Mechanics (cond-mat.stat-mech)
Condensed matter physics
Scattering
Texture (cosmology)
Magnon
FOS: Physical sciences
General Physics and Astronomy
02 engineering and technology
021001 nanoscience & nanotechnology
01 natural sciences
Umklapp scattering
Momentum
Condensed Matter - Strongly Correlated Electrons
Magnetization
0103 physical sciences
Condensed Matter::Strongly Correlated Electrons
010306 general physics
0210 nano-technology
Ground state
Condensed Matter - Statistical Mechanics
Spin-½
Subjects
Details
- ISSN :
- 10797114 and 00319007
- Volume :
- 110
- Database :
- OpenAIRE
- Journal :
- Physical Review Letters
- Accession number :
- edsair.doi.dedup.....97e90d07ddc2a35c552347593c304e3e