Exact diagonalization RIXS studies of the doped 1d t1-t2-J model at the O K-edge
dc.contributor.author | Price, Gregory | |
dc.date.accessioned | 2019-02-13T20:00:10Z | |
dc.date.available | 2019-02-13T20:00:10Z | |
dc.date.issued | 2/13/2019 | |
dc.identifier.uri | http://hdl.handle.net/10675.2/622086 | |
dc.description | Presentation given at the 20th Annual Phi Kappa Phi Student Research and Fine Arts Conference | en |
dc.description.abstract | Resonant inelastic x-ray scattering (RIXS) is a novel spectroscopic method for probing charge and spin excitations in quantum magnets. In one dimension, where quantum fluctuations are most prominent, a system of interacting electrons can support fractionalized spinless charge excitations (holons) and chargeless spin excitation (spinons). Currently, X-ray spectroscopic techniques such as RIXS can excite the O K-edge core electrons of correlated quantum magnets to probe the physical nature of the above mentioned spin-charge separated state. Using exact diagonalization we investigate the O K-edge RIXS response of the one dimensional antiferromagnetic spin chain compound with nearest and next-nearest neighbor hoppings. We also study the spin-anisotropic version of the same model. Interaction of the core electrons with the X-rays generate multi-spinon excitations in the RIXS spectrum, for example in strontium copper oxide. We find that the RIXS spectrum of the t1-t2-J model with spin anisotropy presents a rich source of physical information, including allowing us to identify microscopic pathways for how the quantum spin fluctuations control the appearance of the four spinon excitations observed in the isotropic O K-edge spectrum. | |
dc.subject | 1d spin chain | en |
dc.subject | O K -edge RIXS | en |
dc.title | Exact diagonalization RIXS studies of the doped 1d t1-t2-J model at the O K-edge | en |
dc.type | Oral Presentation | en |
dc.contributor.department | Department of Chemistry & Physics | en |
cr.funding.source | Augusta University CURS Summer Scholars Program | en |
dc.contributor.affiliation | Augusta University | en |
dc.contributor.sponsor | Datta, Trinanjan | en |
html.description.abstract | Resonant inelastic x-ray scattering (RIXS) is a novel spectroscopic method for probing charge and spin excitations in quantum magnets. In one dimension, where quantum fluctuations are most prominent, a system of interacting electrons can support fractionalized spinless charge excitations (holons) and chargeless spin excitation (spinons). Currently, X-ray spectroscopic techniques such as RIXS can excite the O K-edge core electrons of correlated quantum magnets to probe the physical nature of the above mentioned spin-charge separated state. Using exact diagonalization we investigate the O K-edge RIXS response of the one dimensional antiferromagnetic spin chain compound with nearest and next-nearest neighbor hoppings. We also study the spin-anisotropic version of the same model. Interaction of the core electrons with the X-rays generate multi-spinon excitations in the RIXS spectrum, for example in strontium copper oxide. We find that the RIXS spectrum of the t1-t2-J model with spin anisotropy presents a rich source of physical information, including allowing us to identify microscopic pathways for how the quantum spin fluctuations control the appearance of the four spinon excitations observed in the isotropic O K-edge spectrum. |