X-ray dichroism as a probe of orbital quenching and unquenching induced by optically excited Jahn-Teller modes

Journal Article · 23 December 2024 · Physical Review. B

DOI: https://doi.org/10.1103/physrevb.110.235149 · OSTI ID:2496603

van Veenendaal, Michel  ^[1]

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1. Northern Illinois University, DeKalb, IL (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)

The use of soft-X-ray spectroscopy to probe changes in the ground-state due to vibronic excitations is studied. The changes in L-edge X-ray absorption on divalent cobalt in the presence of a vibrating Jahn-Teller distortion are calculated. For linear dichroism, a strong dependence on the distortion is obtained reflecting the change in the local quadrupole moment due to the changes in the xy versus yz/zx hole densities during the oscillation. Here, in the presence of a magnetic moment, significant variations in the circular dichroic signal are obtained related to the quenching and unquenching of the orbital angular momentum.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES)
• Grant/Contract Number: AC02-06CH11357
• OSTI ID: 2496603
• Journal Information: Physical Review. B, Journal Name: Physical Review. B Journal Issue: 23 Vol. 110; ISSN 2469-9950
• Publisher: American Physical Society (APS)Copyright Statement
• Country of Publication: United States
• Language: English