Department of Physics, Kent State University, Kent, Ohio 44242, USA.
Phys Rev Lett. 2012 Feb 3;108(5):056401. doi: 10.1103/PhysRevLett.108.056401. Epub 2012 Jan 30.
We show results on the vortex core dissipation through current-voltage measurements under applied pressure and magnetic field in the superconducting phase of CeCoIn{5}. We find that as soon as the system becomes superconducting, the vortex core resistivity increases sharply as the temperature and magnetic field decrease. The sharp increase in flux-flow resistivity is due to quasiparticle scattering on critical antiferromagnetic fluctuations. The strength of magnetic fluctuations below the superconducting transition suggests that magnetism is complementary to superconductivity and therefore must be considered in order to fully account for the low-temperature properties of CeCoIn{5}.
我们通过在 CeCoIn{5}超导相施加压力和磁场的电流-电压测量展示了涡旋核耗散的结果。我们发现，一旦系统变成超导态，随着温度和磁场的降低，涡旋核电阻率急剧增加。磁通流动电阻率的急剧增加是由于准粒子对临界反铁磁涨落的散射。超导转变以下的磁涨落强度表明，磁性与超导性互补，因此为了充分解释 CeCoIn{5}的低温性质，必须考虑磁性。
