Cooperative cluster-Jahn-Teller effect as a possible route to antiferroelectricity

K. Geirhos, J. Langmann, L. Prodan +8

We report the observation of an antipolar phase in cubic GaNb${}_4$S${}_8$ driven by an unconventional microscopic mechanism, the cooperative Jahn-Teller effect of Nb${}_4$S${}_4$ molecula…