Erratum: Structural and quantum-state phase transitions in van der Waals layered materials

Nature Physics 13, 931–937 (2017); published online 17 July 2017; corrected after print 10 November 2017. In the version of this Progress Article originally published, one of the t2g states in Fig. 2a was missing; there should have been three. The original and corrected Fig. 2a panels are shown below.