Effects of La non-magnetic impurities on the spin resonance of CeCoIn$_{5}$
Abstract
The influence of La non magnetic impurities on the spin dynamics of CeCoIn$_{5}$ was studied by inelastic neutron scattering. In La-substituted systems, the spin resonance peak (observed at $\Omega_{res}=0.55 meV$ in the pure system) is shifted to lower energies but the ratio $\Omega_{res}/k_{B}T_{c}$ remains unchanged. The excitation broadens till it reaches 0.3 meV equal to the value of the quasi-elastic signal in the normal state. The evolution of La substitution is compared with the evolution of the magnetic resonance in Ni and Zn substituted YBa$_{2}$Cu$_{3}$O$_{7}$.
- Publication:
-
arXiv e-prints
- Pub Date:
- January 2011
- DOI:
- 10.48550/arXiv.1101.1018
- arXiv:
- arXiv:1101.1018
- Bibcode:
- 2011arXiv1101.1018P
- Keywords:
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- Condensed Matter - Superconductivity;
- Condensed Matter - Strongly Correlated Electrons
- E-Print:
- 4 pages, 5 figures