摘要
Kondo semimetal CeRu4Sn6 is attracting renewed attention due to the theoretically predicted nontrivial topology in its electronic band structure. We report hydrostatic and chemical pressure effects on the transport properties of single- and poly-crystalline samples. The electrical resistivity p （T） is gradually enhanced by applying pressure over a wide temperature range from room temperature down to 25 mK. Two thermal activation gaps estimated from high- and low-temperature windows are found to increase with pressure. A flat p（T） observed at the lowest temperatures below 300 mK appears to be robust against both pressure and field. This feature as well as the increase of the energy gaps calls for more intensive investigations with respect to electron correlations and band topology.
Kondo semimetal CeRu4Sn6 is attracting renewed attention due to the theoretically predicted nontrivial topology in its electronic band structure. We report hydrostatic and chemical pressure effects on the transport properties of single- and poly-crystalline samples. The electrical resistivity p （T） is gradually enhanced by applying pressure over a wide temperature range from room temperature down to 25 mK. Two thermal activation gaps estimated from high- and low-temperature windows are found to increase with pressure. A flat p（T） observed at the lowest temperatures below 300 mK appears to be robust against both pressure and field. This feature as well as the increase of the energy gaps calls for more intensive investigations with respect to electron correlations and band topology.
作者
张佳浩
张帅
陈子珩
吕孟
赵恒灿
杨义峰
陈根富
孙培杰
Jiahao Zhang;Shuai Zhang;Ziheng Chen;Meng Lv;Hengcan Zhao;Yi-feng Yang;Genfu Chen;Peijie Sun(Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 1 O0190,China;University of Chinese Academy of Sciences,Beijing 100049,China)
基金
Project supported by the Ministry of Science and Technology of China(Grant Nos.2015CB921303 and 2017YFA0303103)
the National Natural Science Foundation of China(Grant Nos.11474332 and 11774404)
the Chinese Academy of Sciences through the Strategic Priority Research Program(Grant No.XDB07020200)
