【摘 要】
：
75As nuclear magnetic resonance (NMR) was measured for Ba(Fe1-xNix)2As2 single crystals with x =0.05 and x =0.1 under 0 and 1.5GPa,respectively.For the optimal
【机 构】
：
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics,Chinese Academy of Sc
论文部分内容阅读
75As nuclear magnetic resonance (NMR) was measured for Ba(Fe1-xNix)2As2 single crystals with x =0.05 and x =0.1 under 0 and 1.5GPa,respectively.For the optimal doped sample with x =0.05,the superconducting transition temperature,Tc,is strongly suppressed from 18 to 5 K,while for the over-doped sample with x =0.1,it is tued from a superconducting ground state to a disordered paramagnetic state under 1.5 GPa.Our experimental results show that the antiferromagnetic spin fluctuations,as well as Tc,are suppressed.The experimental results can be explained with the two-band model.As a result,the electronic band is shifted downwards with an increase in pressure,and the electrons become the dominant carriers in the system.
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