Field-Induced Selective Spin Gap Closure and Quantum Criticality in BaNd${}_2$ZnS${}_5$

Sangyun Lee, A. J. Woods, B. Billingsley +11

We report thermodynamic evidence for field-induced mode-selective quantum criticality in the layered rare-earth magnet BaNd2ZnS5 (BNZS). Below the Neel temperature TN = 2.9 K, spin…