Magnetic-field-induced quantum paraelectric state in multiferroic BiMn2O5

Full text: Quantum paraelectric constitutes a unique material system that remains as a paraelectric state down to a proximate zero temperature without developing a long range order of electric dipoles predicted by mean-field interaction, due to large zero-phonon vibration amplitude (i.e. quantum mechanical fluctuation of ionic position). To realize the zero temperature paraelectric state from the neighboring ferro electricity, researchers have often used pressure or doping as a control parameter, as the responsible source of quantum fluctuation is in the lattice degree of freedom. Herein, we report a novel route to realize the first magnetic field-tuned quantum paraelectric state in a multiferroic compound BiMn2O5. (authors)