Direct observation of a band Jahn–Teller effect in the martensitic phase transition of Ni2MnGa by P Brown, Ahmad Y. Bargawi, J. Crangle, Klaus-Ulrich Neumann, K.R.A. Ziebeck

“…In the tetragonal phase, the degeneracy of the eg and t2g bands is raised and the unpaired electrons are redistributed in such a way that the subbands based on orbitals extending towards the c-axis are preferentially occupied. …”
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Activated carbon from Moringa husks and pods by G. McConnachie, A.M. Warhurst, Simon J. Pollard, Victor Chipofya

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Low-energy Mott-Hubbard excitations in LaMnO3 probed by optical ellipsometry by Natalia Kovaleva, Andrzej M. Oles, A.M. Balbashov, A. Maljuk, D.N. Argyriou, G. Khaliullin, B. Keimer

“…An analysis of the multiplet structure of the intersite transitions by Mn e g electrons allowed us to estimate the effective intra-atomic Coulomb interaction, the Hund exchange coupling, and the Jahn-Teller splitting energy between e g orbitals in LaMnO 3 , as well as to extract experimental information concerning the type of orbital order in LaMnO 3 . …”
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