论文标题
单轴$ c $轴压力对不足的Bafe $ _2 $（$ _ {0.72} $ p $ _ {0.28} $）$ _ 2 $ superconductor
Uniaxial $c$-axis pressure effects on underdoped BaFe$_2$(As$_{0.72}$P$_{0.28}$)$_2$ superconductor
论文作者
论文摘要
最佳超导性（$ t_c \约30 $ k）中的$ _2 $（AS $ _ {1-x} $ p $ _x $ _x $）$ _ 2 $ _ 2 $当耦合的抗fiferromagnetic（afferomagnetic（af）订单（$ t_n $）和正常bombombic bombombic latteftive to zs $ t weperion to ZS $ T_S $ T_S $ T_S $ T_静液压压力。在这里，我们使用运输和中子散射来研究$ C $轴的压力对不足的Bafe $ _2 $中的电子阶段（$ _ {0.72} $ p $ _ {0.28} $）$ _ 2 $，它具有$ t_n = t_n = t_s \ t_s \ of 40 $ k and $ t_c \ of 28 k at Zero，随着$ C $轴压力的增加，$ t_n $和$ t_s $在$ p_c \ sim 20 $ MPA左右略有增强。 Upon further increasing pressure, AF order is gradually suppressed to zero, while $T_c$ is enhanced to 30 K. Our results reveal the importance of magnetoelastic couplings in BaFe$_2$(As$_{1-x}$P$_x$)$_2$, suggesting that the $c$-axis pressure can be used as a tuning parameter to manipulate the electronic phases in iron pnictides.
The optimal superconductivity ($T_c \approx 30 $ K) in BaFe$_2$(As$_{1-x}$P$_x$)$_2$ can be reached when the coupled antiferromagnetic (AF) order ($T_N$) and orthorhombic lattice distortion ($T_s$) are suppressed to zero temperature with increasing of P concentration or hydrostatic pressure. Here we use transport and neutron scattering to study the $c$-axis pressure effects on electronic phases in underdoped BaFe$_2$(As$_{0.72}$P$_{0.28}$)$_2$, which has $T_N = T_s\approx 40$ K and $T_c \approx $ 28 K at zero pressure. With increasing $c$-axis pressure, $T_N$ and $T_s$ are slightly enhanced around $P_c \sim 20 $ MPa. Upon further increasing pressure, AF order is gradually suppressed to zero, while $T_c$ is enhanced to 30 K. Our results reveal the importance of magnetoelastic couplings in BaFe$_2$(As$_{1-x}$P$_x$)$_2$, suggesting that the $c$-axis pressure can be used as a tuning parameter to manipulate the electronic phases in iron pnictides.
