Physics – Condensed Matter – Superconductivity
Scientific paper
2008-03-27
Physics
Condensed Matter
Superconductivity
4 pages, 5 figures
Scientific paper
We report the synthesizing and characterization of the hole doped Ni-based superconductor ($La_{1-x}Sr_{x})ONiAs$. By substituting La with Sr, the superconducting transition temperature $T_c$ is increased from 2.75 K of the parent phase $LaONiAs$ to 3.7 K at the doping levels x= 0.1 - 0.2. The curve $T_c$ versus hole concentration shows a symmetric behavior as the electron doped samples $La(O_{1-x}F_{x})NiAs$. The normal state resistivity in Ni-based samples shows a good metallic behavior and reveals the absence of an anomaly which appears in the Fe-based system at about 150 K, suggesting that this anomaly is not a common feature for all systems. Hall effect measurements indicate that the electron conduction in the parent phase $LaONiAs$ is dominated by electron-like charge carriers, while with more Sr doping, a hole-like band will emerge and finally prevail over the conduction, and accordingly the superconducting transition temperature $T_c$ increases.
Cheng Peng
Fang Lei
Mu Gang
Wen Hai-hu
Yang Huan
No associations
LandOfFree
Synthesizing and characterization of hole doped nickel based layer superconductor (La$_{1-x}$Sr$_{x}$)ONiAs 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 Synthesizing and characterization of hole doped nickel based layer superconductor (La$_{1-x}$Sr$_{x}$)ONiAs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Synthesizing and characterization of hole doped nickel based layer superconductor (La$_{1-x}$Sr$_{x}$)ONiAs will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-354389