Physics – Condensed Matter – Superconductivity
Scientific paper
2011-01-06
New Journal of Physics 13 (2011) 033008
Physics
Condensed Matter
Superconductivity
Scientific paper
10.1088/1367-2630/13/3/033008
We performed the high hydrostatic pressure resistivity measurements (up to 1.7 GPa) on the newly discovered superconductors $A_{x}$Fe$_2$Se$_2$ ($A$ = K and Cs) single crystals. Two batches of single crystals $K_xFe_2Se_2$ with different transition temperatures ($T_c$) were used to study the effect of pressure. The $T_c$ of the first one gradually decreases with increasing pressure from 32.6 K at ambient pressure. While a dome-like behavior was observed for the crystal with $T_c=31.1$ K, and $T_c$ reaches its maximum value of 32.7 K at the pressure of 0.48 GPa. It indicates that there exists a optimal doping with maximum $T_c$ of 32.7K in $K_xFe_2Se_2$ system. The behavior of $T_c$ vs. pressure for $Cs_xFe_2Se_2$ also shows a dome-like behavior, and $T_c$ reaches its maximum value of 31.1 K at the pressure of 0.82 GPa. The hump observed in temperature dependence of resistivity for all the samples tends to shift to high temperature with increasing pressure. The resistivity hump could arise from the vacancy of Fe or Se.
Chen Hua-Xing
Cheng Peiling
Li Zhao-Yu
Liu Hu Ran
Luo X. G.
No associations
LandOfFree
Pressure effect on superconductivity of $A_{x}$Fe$_2$Se$_2$ ($A$ = K and Cs) does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Pressure effect on superconductivity of $A_{x}$Fe$_2$Se$_2$ ($A$ = K and Cs), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pressure effect on superconductivity of $A_{x}$Fe$_2$Se$_2$ ($A$ = K and Cs) will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-399599