We have carried out point-contact spectroscopy(PCS)measurements on one family of antiferromagnetic Kondo semiconductor CeT2Al10(T=Ru and Os)with a Neel temperature´TN∼27.5 and 28.5 K,respectively.Their PCS condu...We have carried out point-contact spectroscopy(PCS)measurements on one family of antiferromagnetic Kondo semiconductor CeT2Al10(T=Ru and Os)with a Neel temperature´TN∼27.5 and 28.5 K,respectively.Their PCS conductance curves both exhibit a characteristic coherent double-peak-structure at temperatures below TN,signaling an AFM gap around the Fermi surface.The temperature dependent AFM gap∆1 follows a Bardeen-Cooper-Schrieffer(BCS)-like mean-field behavior with a moderate gap anisotropy for PCS along different crystal axes.Another asymmetric gap-like feature is observed for both compounds at temperatures far below TN,which is consistent with opening of a new hybridization gap∆h inside the long-range ordered AFM state.Our results suggest a common itinerant nature of the anomalous AFM ordering,constraining theoretical models to explain the AFM origin in CeRu2Al10 and CeOs2Al10.展开更多
基金supported by the Key R&D Program of Zhejiang Province,China(2021C01002)the National Natural Science Foundation of China(11874320,12034017,11874137,and 11974306)+1 种基金the National Key R&D Program of China(2017YFA0303100)Zhejiang Provincial Natural Science Foundation of China(R22A0410240).
基金Project supported by the National Key Research and Development Program of China(Grant Nos.2017YFA0303101 and 2016FYA0300402)the National Natural Science Foundation of China(Grant Nos.11674279,11774404,and 11374257)+1 种基金the Zhejiang Provincial Natural Science Foundation of China(Grant No.LR18A04001)the Japan Society for the Promotion of Science KAKENHI(Grant Nos.JP26400363,JP16H01076,and JP17K05545).
文摘We have carried out point-contact spectroscopy(PCS)measurements on one family of antiferromagnetic Kondo semiconductor CeT2Al10(T=Ru and Os)with a Neel temperature´TN∼27.5 and 28.5 K,respectively.Their PCS conductance curves both exhibit a characteristic coherent double-peak-structure at temperatures below TN,signaling an AFM gap around the Fermi surface.The temperature dependent AFM gap∆1 follows a Bardeen-Cooper-Schrieffer(BCS)-like mean-field behavior with a moderate gap anisotropy for PCS along different crystal axes.Another asymmetric gap-like feature is observed for both compounds at temperatures far below TN,which is consistent with opening of a new hybridization gap∆h inside the long-range ordered AFM state.Our results suggest a common itinerant nature of the anomalous AFM ordering,constraining theoretical models to explain the AFM origin in CeRu2Al10 and CeOs2Al10.
