Zobrazeno 1 - 10
of 122
pro vyhledávání: '"Löhneysen, Hilbert v."'
Autor:
Yang, Chia-Jung, Woerner, Michael, Stockert, Oliver, Loehneysen, Hilbert v., Kroha, Johann, Fiebig, Manfred, Pal, Shovon
Publikováno v:
Phys. Rev. B 109, 235103 (2024)
In strongly correlated systems such as heavy-fermion materials, the coherent superposition of localized and mobile spin states leads to the formation of Kondo resonant states, which on a dense, periodic array of Kondo ions develop lattice coherence.
Externí odkaz:
http://arxiv.org/abs/2312.06931
Autor:
Yang, Chia-Jung, Pal, Shovon, Zamani, Farzaneh, Kliemt, Kristin, Krellner, Cornelius, Stockert, Oliver, Löhneysen, Hilbert v., Kroha, Johann, Fiebig, Manfred
Publikováno v:
Phys. Rev. Research 2, 033296 (2020)
The Drude model describes the free-electron conduction in simple metals, governed by the freedom that the mobile electrons have within the material. In strongly correlated systems, however, a significant deviation of the optical conductivity from the
Externí odkaz:
http://arxiv.org/abs/2004.07719
Autor:
Huesges, Zita, Lucas, Stefan, Wunderlich, Sarah, Yokaichiya, Fabiano, Prokeš, Karel, Schmalzl, Karin, Lemée-Cailleau, Marie-Hélène, Pedersen, Bjørn, Fritsch, Veronika, Löhneysen, Hilbert v., Stockert, Oliver
Publikováno v:
Phys. Rev. B 96, 144405 (2017)
We report on a single-crystal neutron diffraction study of the evolution of the antiferromagnetic order in the heavy-fermion compound CePd$_{1-x}$Ni$_x$Al which exhibits partial geometric frustration due to its distorted Kagom\'e structure. The magne
Externí odkaz:
http://arxiv.org/abs/1709.02566
Autor:
Du, Renjun, Liu, Ming-Hao, Mohrmann, Jens, Wu, Fan, Krupke, Ralph, Löhneysen, Hilbert v., Richter, Klaus, Danneau, Romain
Publikováno v:
Phys. Rev. Lett. 121, 127706 (2018)
We show that in gapped bilayer graphene, quasiparticle tunneling and the corresponding Berry phase can be controlled such that it exhibits features of single layer graphene such as Klein tunneling. The Berry phase is detected by a high-quality Fabry-
Externí odkaz:
http://arxiv.org/abs/1703.07260
Autor:
Lucas, Stefan, Grube, Kai, Huang, Chien-Lung, Sakai, Akito, Wunderlich, Sarah, Green, Elizabeth Lauren, Wosnitza, Joachim, Fritsch, Veronika, Gegenwart, Philipp, Stockert, Oliver, Löhneysen, Hilbert v.
Publikováno v:
Phys. Rev. Lett. 118, 107204 (2017)
In the heavy-fermion metal CePdAl long-range antiferromagnetic order coexists with geometric frustration of one third of the Ce moments. At low temperatures the Kondo effect tends to screen the frustrated moments. We use magnetic fields $B$ to suppre
Externí odkaz:
http://arxiv.org/abs/1612.03104
Publikováno v:
Phys. Rev. B 96, 085120 (2017)
Cerium is a fascinating element exhibiting, with its different phases, long-range magnetic order and superconductivity in bulk form. The coupling of the 4f electron to sd conduction electrons and to the lattice is responsible for unique structural an
Externí odkaz:
http://arxiv.org/abs/1610.05933
Autor:
Sürgers, Christoph, Wolf, Thomas, Adelmann, Peter, Kittler, Wolfram, Fischer, Gerda, Löhneysen, Hilbert v.
Publikováno v:
Scientific Reports 7, Article number: 42982 (2017)
The anomalous Hall effect (AHE), which in long-range ordered ferromagnets appears as a voltage transverse to the current and usually is proportional to the magnetization, often is believed to be of negligible size in antiferromagnets due to their low
Externí odkaz:
http://arxiv.org/abs/1609.05047
Autor:
Fritsch, Veronika, Lucas, Stefan, Huesges, Zita, Sakai, Akito, Kittler, Wolfram, Taubenheim, Christian, Woitschach, Sarah, Pedersen, Bjørn, Grube, Kai, Schmidt, Burkhard, Gegenwart, Philipp, Stockert, Oliver, Löhneysen, Hilbert v.
Publikováno v:
Journal of Physics: Conf. Series 807 (2017) 032003
Magnetic frustration, which is well-defined in insulating systems with localized magnetic moments, yields exotic ground states like spin ices, spin glasses, or spin liquids. In metals magnetic frustration is less well defined because of the incipient
Externí odkaz:
http://arxiv.org/abs/1609.01551
Autor:
Sakai, Akito, Lucas, Stefan, Gegenwart, Philipp, Stockert, Oliver, Löhneysen, Hilbert v., Fritsch, Veronika
Publikováno v:
Phys. Rev. B 94, 220405(R), (2016)
CePdAl with Ce $4f$ moments forming a distorted kagom\'e network is one of the scarce materials exhibiting Kondo physics and magnetic frustration simultaneously. As a result, antiferromagnetic (AF) order setting in at $T_{\mathrm{N}} = 2.7$~K encompa
Externí odkaz:
http://arxiv.org/abs/1609.00816
Autor:
Eilers, Felix, Grube, Kai, Zocco, Diego A., Wolf, Thomas, Merz, Michael, Schweiss, Peter, Heid, Rolf, Eder, Robert, Yu, Rong, Zhu, Jian-Xin, Si, Qimiao, Shibauchi, Takasada, Löhneysen, Hilbert v.
Publikováno v:
Phys. Rev. Lett. 116, 237003 (2016)
Superconductors close to quantum phase transitions often exhibit a simultaneous increase of electronic correlations and superconducting transition temperatures. Typical examples are given by the recently discovered iron-based superconductors. We inve
Externí odkaz:
http://arxiv.org/abs/1510.01857