Screw dislocations in the X-cube fracton model
| Autor: | Nandagopal Manoj, Xie Chen, Wilbur Shirley, Kevin Slagle |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Physics
Logarithm Condensed matter physics Strongly Correlated Electrons (cond-mat.str-el) QC1-999 General Physics and Astronomy FOS: Physical sciences 01 natural sciences Foliation 010305 fluids & plasmas Condensed Matter::Materials Science Condensed Matter - Strongly Correlated Electrons Lattice (order) 0103 physical sciences Cube Dislocation 010306 general physics Degeneracy (mathematics) Ground state Fracton |
| Zdroj: | SciPost Physics, Vol 10, Iss 4, p 094 (2021) |
| Popis: | The X-cube model, a prototypical gapped fracton model, has been shown to have a foliation structure. That is, inside the 3+1D model, there are hidden layers of 2+1D gapped topological states. A screw dislocation in a 3+1D lattice can often reveal nontrivial features associated with a layered structure. In this paper, we study the X-cube model on lattices with screw dislocations. In particular, we find that a screw dislocation results in a finite change in the logarithm of the ground state degeneracy of the model. Part of the change can be traced back to the effect of screw dislocations in a simple stack of 2+1D topological states, hence corroborating the foliation structure in the model. The other part of the change comes from the induced motion of fractons or sub-dimensional excitations along the dislocation, a feature absent in the stack of 2+1D layers. 24+4 pages, 26 figures, 1 table |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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