中国物理B ›› 2022, Vol. 31 ›› Issue (11): 117103-117103.doi: 10.1088/1674-1056/ac8345
Hengcan Zhao(赵恒灿)1, Meng Lyu(吕孟)1, Jiahao Zhang(张佳浩)1, Shuai Zhang(张帅)1, and Peijie Sun(孙培杰)1,2,3,†
Hengcan Zhao(赵恒灿)1, Meng Lyu(吕孟)1, Jiahao Zhang(张佳浩)1, Shuai Zhang(张帅)1, and Peijie Sun(孙培杰)1,2,3,†
摘要: CePdAl has been recently recognized as a frustrated antiferromagnetic heavy-fermion compound with a pressure- or field-tuned, extended quantum critical phase at zero temperature. Identifying characteristic signatures of the emerging quantum critical phase, which are expected to be distinct from those near a quantum critical point, remains challenging. In this work, by performing ultrasonic and thermoelectric measurements down to very low temperatures in a 3He-4He dilution refrigerator in the presence of magnetic field, we are able to obtain some crucial thermodynamic and thermal transport features of the quantum critical phase, including a frustration-related elastic softening detected by ultrasound and a Fermi-surface change probed by thermoelectric effect.
中图分类号: (Strongly correlated electron systems; heavy fermions)