63Cu NQR–NMR relaxation measurements in CeCu5.9Au0.1 are used to achieve insights on the k-integrated, lowenergy, generalized susceptibility chi(k,w,H,T->0) around the quantum critical point. The response function indicated by neutron scattering, namely of 2D character with anomalous exponent and with (w/T) scaling, appears to justify the main experimental findings. A breakdown of that form of w is found to occur below a field-dependent temperature T*(H); where a behavior characteristic of a gapped system sets in.
Magnetic field effect at the quantum critical point from NQR-NMR relaxation
CARRETTA, PIETRO;PAPINUTTO, NICO DARIO;RIGAMONTI, ATTILIO;
2004-01-01
Abstract
63Cu NQR–NMR relaxation measurements in CeCu5.9Au0.1 are used to achieve insights on the k-integrated, lowenergy, generalized susceptibility chi(k,w,H,T->0) around the quantum critical point. The response function indicated by neutron scattering, namely of 2D character with anomalous exponent and with (w/T) scaling, appears to justify the main experimental findings. A breakdown of that form of w is found to occur below a field-dependent temperature T*(H); where a behavior characteristic of a gapped system sets in.File in questo prodotto:
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