NMR study of novel quantum critical behavior in YbRhSi

Kambe, Shinsaku

no journal, , 

By means of nuclear magnetic resonance (NMR) Knight shift and spin-lattice relaxation time measurements on a single crystal sample YbRhSi, the magnetic excitations around quantum critical phase transition is investigated. It is revealed that the coexisting Fermi and non-Fermi states appears near the quantum critical phase transition. Such a mottled state is perhaps remained hidden in Ce and U heavy fermion compounds, owing presumably to short lifetimes for the two states. The mottled state is highly anisotropic to applied magnetic field, which is consistent with previously obtained phase diagram. The origin of mottled state will be discussed.