41 citations · 110 across the 5 of their papers we have counts for
5 papers
Far-infrared optical conductivity of CeCu2Si2
J. Sichelschmidt, A. Herzog, H. S. Jeevan +4
Journal ref.: J. Phys.: Condens. Matter 25, 065602 (2013): We investigated the optical reflectivity of the heavy-fermion metal CeCu2Si2 in the energy range 3 meV - 30 eV for temper…
The dimerized ferromagnetic Heisenberg chain
A. Herzog, P. Horsch, A. M. Oles +1
Ferromagnetic, in contrast to antiferromagnetic, Heisenberg chains can undergo a Spin-Peierls dimerization only at finite temperatures. They show reentrant behavior as a function o…
The J1-J2 Heisenberg model at and close to its z=4 quantum critical point
J. Sirker, V. Y. Krivnov, D. V. Dmitriev +5
We study the frustrated J1-J2 Heisenberg model with ferromagnetic nearest neighbor coupling J1<0 and antiferromagnetic next-nearest neighbor coupling J2>0 at and close to the z=4 q…
Strong electron correlations in FeSb2: An optical investigation and comparison with RuSb2
A. Herzog, M. Marutzky, J. Sichelschmidt +4
We report investigations of the optical properties of the narrow gap semiconductor FeSb2 in comparison with the structural homolog RuSb2. In the infrared region the latter shows in…
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…