Journal
PHYSICAL REVIEW LETTERS
Volume 117, Issue 12, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.117.127203
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Funding
- Gordon and Betty Moore Foundation [4304]
- NSF [DMR-1511768]
- Deutsche Forschungsgemeinschaft [SFB 1143]
- Harvard-MIT CUA
- National Science Foundation [NSF PHY11-25915]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1511768] Funding Source: National Science Foundation
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We calculate the resonant inelastic x-ray scattering (RIXS) response of the Kitaev honeycomb model, an exactly solvable quantum-spin-liquid model with fractionalized Majorana and flux excitations. We find that the fundamental RIXS channels, the spin-conserving (SC) and the non-spin-conserving (NSC) ones, do not interfere and give completely different responses. SC RIXS picks up exclusively the Majorana sector with a pronounced momentum dispersion, whereas NSC RIXS also creates immobile fluxes, thereby rendering the response only weakly momentum dependent, as in the spin structure factor measured by inelastic neutron scattering. RIXS can, therefore, pick up the fractionalized excitations of the Kitaev spin liquid separately, making it a sensitive probe to detect spin-liquid character in potential material incarnations of the Kitaev honeycomb model.
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