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
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
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)。