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Structural and electrical transport properties of Cu-doped Fe1–x Cu x Se single crystalsProject supported by the National Key Research and Development of China (Grant No. 2018YFA0704200), the National Natural Science Foundation of China (Grant No. 11834016), and the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDB25000000).
Chinese Physics B ( IF 1.7 ) Pub Date : 2021-02-13 , DOI: 10.1088/1674-1056/abc3af
He Li 1, 2 , Ming-Wei Ma 2, 3 , Shao-Bo Liu 2, 4 , Fang Zhou 2, 3, 4 , Xiao-Li Dong 2, 3, 4
Affiliation  

We report the structural and electrical transport properties of Fe1–x Cu x Se (x = 0, 0.02, 0.05, 0.10) single crystals grown by a chemical vapor transport method. Substituting Cu for Fe suppresses both the nematicity and superconductivity of FeSe single crystal, and provokes a metal–insulator transition. Our Hall measurements show that the Cu substitution also changes an electron dominance at low temperature of un-doped FeSe to a hole dominance of Cu-doped Fe1–x Cu x Se at x = 0.02 and 0.1, and reduces the sign-change temperature (TR ) of the Hall coefficient (R H).



中文翻译:

掺杂Cu的Fe 1– x Cu x Se单晶的结构和电传输性质 国家重点研究发展计划(批准号:2018YFA0704200),国家自然科学基金(批准号:11834016)和中科院战略重点研究计划(批准号:XDB25000000)资助的项目。

我们报告了通过化学气相传输方法生长的Fe 1- x Cu x Se(x = 0,0.02,0.05,0.10)单晶的结构和电传输特性。用Cu代替Fe可以抑制FeSe单晶的向列性和超导性,并引起金属-绝缘体的转变。我们的霍尔测量结果表明,在x = 0.02和0.1时,Cu取代还将未掺杂的FeSe在低温下的电子优势变为掺杂Cu的Fe 1 - x Cu x Se的空穴优势,并降低了符号变化温度霍尔系数(R H)的(T R)。

更新日期:2021-02-13
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