268 citations · 4.1k across the 156 of their papers we have counts for
12 papers · 1 filter
Break up of heavy fermions at an antiferromagnetic instability
S. Friedemann, S. Wirth, S. Kirchner +7
We present results of high-resolution, low-temperature measurements of the Hall coefficient, thermopower, and specific heat on stoichiometric YbRh2Si2. They support earlier conclus…
Temperature- and Magnetic-Field-Dependent Optical Properties of Heavy Quasiparticles in YbIr2Si2
T. Iizuka, S. Kimura, A. Herzog +4
We report the temperature- and magnetic-field-dependent optical conductivity spectra of the heavy electron metal YbIrSi. Upon cooling below the Kondo temperature ($T_{\rm K…
Electron Spin Resonance of the ferromagnetic Kondo lattice CeRuPO
T. Förster, J. Sichelschmidt, C. Krellner +2
The spin dynamics of the ferromagnetic Kondo lattice CeRuPO is investigated by Electron Spin Resonance (ESR) at microwave frequencies of 1, 9.4, and 34~GHz. The measured resonance…
Fermi-surface collapse and dynamical scaling near a quantum critical point
Sven Friedemann, Niels Oeschler, Steffen Wirth +6
Quantum criticality arises when a macroscopic phase of matter undergoes a continuous transformation at zero temperature. While the collective fluctuations at quantum-critical point…
Discontinuous Hall coefficient at the quantum critical point in YbRh2Si2
Sven Friedemann, Niels Oeschler, Steffen Wirth +6
YbRh2Si2 is a model system for quantum criticality. Particularly, Hall effect measurements helped identify the unconventional nature of its quantum critical point. Here, we present…
CeFePO: f-d hybridization and quenching of superconductivity
M. G. Holder, A. Jesche, P. Lombardo +11
Being homologue to the new, Fe-based type of high-temperature superconductors, CeFePO exhibits magnetism, Kondo and heavy-fermion phenomena. We experimentally studied the electroni…