Fermi Surface of Metallic V₂O₃ from Angle-Resolved Photoemission: Mid-level Filling of e_g^π Bands

2016/10/17 by I. Lo Vecchio, J. D. Denlinger, O. Krupin +5 · 1 citation
Physics and Astronomy · #cond-mat.str-el

paper · pdf · doi:10.1103/physrevlett.117.166401

published as Phys. Rev. Lett. 117, 166401 (2016) · 5 pages, 4 figures plus supplement 12 pages, 3 figures, 1 table

arxiv created 2016/10/17 · arxiv updated 2016/10/18

Abstract

Using angle resolved photoemission spectroscopy (ARPES) we report the first band dispersions and distinct features of the bulk Fermi surface (FS) in the paramagnetic metallic phase of the prototypical metal-insulator transition material V₂O₃. Along the c-axis we observe both an electron pocket and a triangular hole-like FS topology, showing that both V 3d a_1g and e_g^π states contribute to the FS. These results challenge the existing correlation-enhanced crystal field splitting theoretical explanation for the transition mechanism and pave the way for the solution of this mystery.

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