Multiple Coulomb phases with temperature tunable ice rules in pyrochlore spin crossover materials
| Autor: | Jace Cruddas, Ben Powell |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Physics
Strongly Correlated Electrons (cond-mat.str-el) Condensed matter physics Pyrochlore FOS: Physical sciences engineering.material Ice rules 010402 general chemistry 01 natural sciences 0104 chemical sciences Condensed Matter - Strongly Correlated Electrons Spin crossover Phase (matter) 0103 physical sciences engineering Coulomb Tetrahedron Condensed Matter::Strongly Correlated Electrons Gauge theory 010306 general physics Spin-½ |
| Popis: | Spin crossover molecules have two accessible states: high spin (HS) and low spin (LS). We show that, on the pyrochlore lattice, elastic interactions between SCO molecules can give rise to three spin-state ice phases. Each is a ``Coulomb phase'' where a local ice-rule can be mapped to a divergence free gauge field and the low energy excitations carry a spin fractionalized midway between the LS and HS states. The unique nature of spin crossover materials allows temperature to change the ice rules allowing straightforward access to Coulomb phases not yet observed in water or spin ices. 6+3 pages, 5+5 figures |
| Databáze: | OpenAIRE |
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