Fig. 1: Experimental Crystal structures of VO2.
From: Hidden magnetism and split off flat bands in the insulator metal transition in VO2
a Monoclinic (M) VO2 (space group: \(P{2}_{1}/c\))48 with alternating short (shown by blue bond) and long (shown by dashed line) V-V bonds along the V chain (in the direction of the a axis of the monoclinic lattice) due to V-V dimerization. b Rutile (R) VO2 (space group: \(P{4}_{2}/{mnm}\))46 with uniform V-V bond length along the V chain (in the direction of the c axis of the rutile lattice) and absence of V-V dimerization. The cartesian axes used in electronic structure calculations are given (a, b).
