Annealing effects on the crystal structure and physical properties of FeSe1−xTex (0.6≦x≦1) single crystals
作者:M. Imaizumi、T. Noji、T. Adachi、Y. Koike
DOI:10.1016/j.physc.2011.05.009
日期:2011.11
single-crystals of x = 0.6–0.8, the SC condensation energy, U0, and the SC gap, Δ0, at 0 K have been estimated as ∼1.8 J/mol and 2.3–2.5 meV, respectively. The value of 2Δ0/kBTc is 3.9–4.5, indicating a little strong-coupling superconductivity. Both the electronic specific-heat coefficient in the normal state, γn, and the residual electronic specific-heat coefficient in the SC state, γ0, have been found
FESE的退火效应1- X特X(0.6≦ X ≦1)单晶已经从粉末X射线衍射和比热的测量值的影响。通过退火,粉末X射线衍射的几个峰变得尖锐,并且在x = 0.6-0.9的超导(SC)转变温度T c下观察到了比热的清晰跳跃,表明体超导性。对于退火的单结晶X = 0.6-0.8,所述SC缩合能量,ü 0和SC间隙,Δ 0,在0 K时已被估计为〜1.8焦耳/摩尔分别与2.3-2.5兆电子伏。值2Δ 0 / ķ乙Ť Ç是3.9-4.5,表明稍微强耦合超导性。无论是在正常状态下的电子比热系数,γ Ñ,而在SC状态的残余电子比热系数,γ 0,已经发现,以显示显著X依赖性。的值γ Ñ比从频带计算估计的大得多。