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Updated: Aug 16, 2025

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
Published on: June 28, 2018
Spin-orbit coupling, orbitally entangled antiferromagnetic order, and collective spin-orbital excitations inSr2VO4
Shubhajyoti Mohapatra1, Dheeraj Kumar Singh2, Rajyavardhan Ray3
1Theory Division, Saha Institute of Nuclear Physics, HBNI, Kolkata 700064, India.
Abstract:
With electron fillingn = 1 in theSr2VO4compound, the octahedrally coordinatedt2gorbitals are strongly active when the tetragonal distortion induced crystal field is tuned by external agent such as pressure. Considering the full range of crystal field induced tetragonal splitting in a realistic three-orbital model, collective spin-orbital excitations are investigated using the generalized self-consistent plus fluctuation approach. At ambient pressure, an entangled orbital + antiferromagnetic order is found to be stabilized beyond a critical value (∼30 meV) of spin-orbit coupling which is in the realistic range for 3d ions. The behavior of the calculated energy scales of collective excitations with crystal field is consistent with that of the transition temperatures with pressure as obtained from susceptibility and resistivity anomalies in high-pressure studies.
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