Magnetization study of the energy scales in YbRhSi under chemical pressure
arXiv:1303.2224 · doi:10.1002/pssb.201200771
Abstract
We present a systematic study of the magnetization in YbRhSi under slightly negative (6?% Ir substitution) and positive (7% Co substitution) chemical pressure. We show how the critical field , associated with the high-field Lifshitz transitions, is shifted to lower (higher) values with Co (Ir) substitution. The critical field , which identifies the boundary line of the antiferromagnetic (AFM) phase increases with positive pressure and it approaches zero with 6% Ir substitution. On the other side, the crossover field , associated with the energy scale where a reconstruction of the Fermi surface has been observed, is not much influenced by the chemical substitution.}{Following the analysis proposed in Refs.\,\cite{Paschen2004,Gegenwart2007,Friedemann2009,Tokiwa2009a} we have fitted the quantity with a crossover function to indentify . The line follows an almost linear -dependence at sufficiently high fields outside the AFM phase, but it deviates from linearity at and in Yb(RhCo)Si it changes slope clearly inside the AFM phase. Moreover, the FWHM of the fit function depends linearly on temperature outside the phase, but remains constant inside, suggesting either that such an analysis is valid only for or that the Fermi surface changes continuously at inside the AFM phase.}}
6 pages, 4 figures
References in corpus (13)
- Fermi-liquid instabilities at magnetic quantum phase transitions
- Quantum Criticality in Heavy Fermion Metals
- Fractionalized Fermi liquids
- Multiple energy scales at a quantum critical point
- Frustration and the Kondo effect in heavy fermion materials
- Fermi-surface collapse and dynamical scaling near a quantum critical point
- Divergence of the Magnetic Grüneisen Ratio at the Field-Induced Quantum Critical Point in YbRhSi
- Magnetic-Field Dependence of the YbRh2Si2 Fermi Surface
- Zeeman-driven Lifshitz transition: A scenario for the Fermi-surface reconstruction in YbRh2Si2
- From itinerant to local-moment antiferromagnetism in Kondo lattices: Adiabatic continuity vs. quantum phase transitions
- Fermi surface and antiferromagnetism in the Kondo lattice: an asymptotically exact solution in d>1 Dimensions
- Isosbestic points in the spectral function of correlated electrons
- Effect of pressure and Ir substitution in YbRh2Si2