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Monopole Field Textures in Interacting Spin Systems
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- Eriksson, Anders (author)
- Uppsala universitet,Institutionen för fysik och astronomi,Quantum information theory
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- Sjöqvist, Erik (author)
- Uppsala universitet,Materialteori,Quantum information theory
- (creator_code:org_t)
- American Physical Society (APS), 2020
- 2020
- English.
- In: Physical Review A. Atomic, Molecular, and Optical Physics. - : American Physical Society (APS). - 1050-2947 .- 1094-1622. ; 101:5
- Journal article (peer-reviewed)
Abstract
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- Magnetic monopoles can appear as emergent structures in a wide range of physical settings, ranging from spin ice to Weyl points in semimetals. Here, a distribution of synthetic (Berry) monopoles in parameter space of a slowly changing external magnetic field is demonstrated in a system of interacting spin-1/2 particles with broken spherical symmetry. These monopoles can be found at points where the external field is nonzero. The spin-spin interaction provides a mechanism for splitting the synthetic local magnetic charges until their magnitude reach the smallest allowed value 1/2. For certain states, a nonzero net charge can be created in an arbitrarily large finite region of parameter space. The monopole field textures contain non-monopolar contributions in the presence of spin-spin interaction.
Subject headings
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
Keyword
- Magnetic monopoles
- Berry connection
- Spin systems
- Physics with spec. in Atomic, Molecular and Condensed Matter Physics
- Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik
- Fysik
- Physics
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- ref (subject category)
- art (subject category)
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