Magnetic monopole polarons in spin ice with mixed coordination numbers
arXiv:1306.6154 · doi:10.1209/0295-5075/114/37004
Abstract
Emergent quasiparticles that arise from the fractionalization of the microscopic degrees of freedom have been one of the central themes in modern condensed matter physics. The notion of magnetic monopoles, freely moving quasiparticles fragmented from local dipole excitations, has enjoyed much success in understanding the thermodynamic, static, and transport properties of the so-called spin-ice materials. The artificial version of spin ice, where a lattice of nanoscale magnetic dipoles is sculpted out of a ferromagnetic film, provides a unique opportunity to study these unusual quasiparticles in a material-by-design approach. Here we show that the elementary excitations in the ice phase of a nano-magnetic array arranged in the pentagonal lattice are composite objects comprised of the emergent monopole and a surrounding cloud of opposite uncompensated magnetic charges.
5 pages, 4 figures
References in corpus (12)
- Artificial "spin ice" in a geometrically frustrated lattice of nanoscale ferromagnetic islands
- Spin Ice, Fractionalization and Topological Order
- Direct observation of the ice rule in artificial kagome spin ice
- Artificial square ice and related dipolar nanoarrays
- Artificial Kagome Arrays of Nanomagnets: A Frozen Dipolar Spin Ice
- Ground state lost but degeneracy found: the effective thermodynamics of artificial spin ice
- Debye-Hückel theory for spin ice at low temperature
- Dynamics of magnetic charges in artificial spin ice
- Vertex dynamics in finite two dimensional square spin ices
- Magnetic charge and ordering in kagome spin ice
- Degeneracy and criticality from emergent frustration in artificial spin ice
- Out of equilibrium dynamics in the bidimensional spin-ice model
Cited by in corpus (8)
- Sculpting the Spin-Wave Response of Artificial Spin Ice via Microstate Selection
- Logical gates embedding in Artificial Spin Ice
- Ice Rule Fragility via Topological Charge Transfer in Artificial Colloidal Ice
- Theory of magnetotransport in artificial kagome spin ice
- Artificial Spin Ice Phase-Change Memory Resistors
- Accessing low-energy magnetic microstates in symmetry-broken isolated square artificial spin ice vertices with magnetic field
- Controlled creation and annihilation of stringless robust emergent magnetic monopoles in artificial spin ice
- On the Degeneracy of Spin Ice Graphs, and its Estimate via the Bethe Permanent