2003/10/15 by Sudhakar Yarlagadda, Yarlagadda, Sudhakar, Manidipa Mitra +1
Physics and Astronomy · #FOS: Physical sciences #Strongly Correlated Electrons (cond-mat.str-el) #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.cond-mat/0310350
Presented at Condensed Matter Days conference, Jadavpur Univ., Calcutta
arxiv created 2003/10/15 · arxiv updated 2009/12/01
To understand the orbital ordering of LaMnO3 in the ground state, we study it in the A-type spin antiferromagnetic state. We calculate the two-dimensional response functions associated with the Jahn-Teller Q2 and Q3 distortions and find that they diverge at the wavevector π,π). Furthermore, the Q2 response function diverges faster which indicates that perhaps the ordering of the orbitals at low temperatures is dominated by the Q2 distortion. We calculate the ground state energy for the cases when only one of the Q2 and Q3 modes is excited cooperatively and find that the Q2 excited state yields lower energy.