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papers

Publications (33)

cond-mat.supr-con2022

CeCu $_{2}$ Si $_{2}$ and YbRh $_{2}$ Si $_{2}$ : Strange Cases of Heavy-Fermion Superconductivity

Z. Y. Shan, M. Smidman, O. Stockert +6

The heavy-fermion superconductor CeCu $_{2}$ Si $_{2}$ exhibits two-band, $d$ -wave superconductivity with a finite energy gap over the whole Fermi surface around the magnetic instabil…

cond-mat.str-el2022

Spin-liquid signatures in the quantum critical regime of pressurized CePdAl

M. Majumder, R. Gupta, H. Luetkens +4

CePdAl is a prototypical frustrated Kondo lattice with partial long-range order (LRO) at $T_{N} = 2.7$ K. Previous bulk experiments under hydrostatic pressure found signatures…

cond-mat.str-el2018

Multidimensional entropy landscape of quantum criticality

K. Grube, S. Zaum, O. Stockert +2

The Third Law of Thermodynamics states that the entropy of any system in equilibrium has to vanish at absolute zero temperature. At nonzero temperatures, on the other hand, matter…

cond-mat.supr-con2012

Routes to heavy-fermion superconductivity

F. Steglich, O. Stockert, S. Wirth +4

Superconductivity in lanthanide- and actinide-based heavy-fermion metals can have different microscopic origins. Among others, Cooper pair formation based on fluctuations of the va…

cond-mat.supr-con2008

Direct observation of the superconducting gap in phonon spectra

F. Weber, A. Kreyssig, L. Pintschovius +5

We show that the superconducting energy gap $I^$ can be directly observed in phonon spectra, as predicted by recent theories. In addition, since each phonon probes the gap on only…

cond-mat.str-el2016

Unique magnetic structure of YbCo $_{2}$ Si $_{2}$

N. Mufti, K. Kaneko, A. Hoser +4

We report on the results of powder and single crystal neutron diffraction to investigate the magnetic order in YbCo $_{2}$ Si $_{2}$ below the NÃ©el temperature $T_{N} = 1.7$ K in det…