Anomalous low-temperature heat capacity in antiperovskite compounds

Guo Xin-Ge^{1, 2}, Lin Jian-Chao¹, Tong Peng^{1, †}, Lin Shuai¹, Yang Cheng¹, Lu Wen-Jian¹, Song Wen-Hai¹, Sun Yu-Ping^{1, 3, 4}

(color online) Linear fittings (solid lines) to C/T versus T ² data below 10 K for Ga_0.7NMn_3.3, CuNMn₃, and AgNMn₃.