Seeing Dirac electrons and heavy fermions in new boron nitride monolayers

Kang Yu-Jiao^{1, 2}, Chen Yuan-Ping^{1, 2}, Yuan Jia-Ren², Yan Xiao-Hong², Xie Yue-E^{1, 2, †}

Phonon dispersions of (a) 5–7 BN and (b) Kagome BN, where no soft mode is found.