Charge density functional plus U calculation of lacunar spinel GaM4Se8(M = Nb, Mo, Ta, and W)Hyunggeun Lee, Min Yong Jeong, Jae-Hoon Sim, Hongkee Yoon, Siheon Ryee and Myung Joon HanEPL, 125 4 (2019) 47005DOI: https://doi.org/10.1209/0295-5075/125/47005