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Magnetic excitations in stripe-ordered La 1.875 Ba 0.125 CuO 4 studied using resonant inelastic x-ray scattering

Journal Article · · Physical Review. B, Condensed Matter and Materials Physics
The charge and spin correlations in La 1.875 Ba 0.125 CuO 4 (LBCO 1/8) are studied using Cu L 3 edge resonant inelastic x-ray scattering (RIXS). The static charge order (CO) is observed at a wave vector of ( 0.24 , 0 ) and its charge nature confirmed by measuring the dependence of this peak on the incident x-ray polarization. The damped spin excitation or “paramagnon” in LBCO 1/8 is then measured as it disperses through the CO wave vector. Within the experimental uncertainty no changes are observed in the paramagnon at that wave vector and the paramagnon seems to be similar to that measured in other cuprates, which have no static CO. Given that the stripe correlation modulates both the charge and spin degrees of freedom, it is likely that subtle changes do occur in the paramagnon due to CO. Consequently, we propose that future RIXS measurements, realized with higher-energy resolution and sensitivity, should be performed to test for these effects.
Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Center for Emergent Superconductivity (CES)
Sponsoring Organization:
USDOE SC Office of Basic Energy Sciences (SC-22)
DOE Contract Number:
AC02-98CH10886
OSTI ID:
1385470
Journal Information:
Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 2 Vol. 88; ISSN 1098-0121; ISSN PRBMDO
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English

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