Imperial College London
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ProfessorWillBranford

Faculty of Natural Sciences, Department of Physics

Professor of Solid State Physics
 
 
 
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Contact

 

+44 (0)20 7594 6674w.branford Website

 
 
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Location

 

912Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Dion:2021:10.1103/PhysRevResearch.4.013107,
author = {Dion, T and Gartside, JC and Vanstone, A and Stenning, KD and Arroo, DM and Kurebayashi, H and Branford, WR},
doi = {10.1103/PhysRevResearch.4.013107},
journal = {Physical Review Research},
pages = {1--9},
title = {Observation and control of collective spin-wave mode-hybridisation in  chevron arrays and square, staircase and brickwork artificial spin ices},
url = {http://dx.doi.org/10.1103/PhysRevResearch.4.013107},
volume = {4},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Dipolar magnon-magnon coupling has long been predicted in nano-patternedartificial spin systems. However, observation of such phenomena and relatedcollective spin-wave signatures have until recently proved elusive or limitedto low-power edge-modes which are difficult to measure experimentally. Here wedescribe the requisite conditions for dipolar mode-hybridisation, how it may becontrolled, why it was not observed earlier and how strong coupling may occurbetween nanomagnet bulk-modes. We experimentally investigate fournano-patterned artificial spin system geometries: `chevron' arrays, `square',`staircase' and `brickwork' artificial spin ices. We observe significantdynamic dipolar-coupling in all systems with relative coupling strengths andavoided-crossing gaps supported by micromagnetic-simulation results. Wedemonstrate reconfigurable mode-hybridisation regimes in each system viamicrostate control, and in doing so elucidate the underlying dynamics governingdynamic dipolar-coupling with implications across reconfigurable magnonics. Wedemonstrate that confinement of the bulk-modes via edge effects play a criticalrole in dipolar hybridised-modes, and treating nanoislands as a coherentlyprecessing macro-spins or standing spin-waves are insufficient to captureexperimentally-observed coupling phenomena. Finally, we present aparameter-space search detailing how coupling strength may be tuned viananofabrication-dimensions and material properties.
AU  - Dion,T
AU  - Gartside,JC
AU  - Vanstone,A
AU  - Stenning,KD
AU  - Arroo,DM
AU  - Kurebayashi,H
AU  - Branford,WR
DO  - 10.1103/PhysRevResearch.4.013107
EP  - 9
PY  - 2021///
SN  - 2643-1564
SP  - 1
TI  - Observation and control of collective spin-wave mode-hybridisation in  chevron arrays and square, staircase and brickwork artificial spin ices
T2  - Physical Review Research
UR  - http://dx.doi.org/10.1103/PhysRevResearch.4.013107
UR  - http://arxiv.org/abs/2112.05354v1
UR  - http://journals.aps.org/prresearch/abstract/10.1103/PhysRevResearch.4.013107
UR  - http://hdl.handle.net/10044/1/94075
VL  - 4
ER  -
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