Unusual heat transport of the Kitaev material Na$_2$Co$_2$TeO$_6$: putative quantum spin liquid and low-energy spin excitations

no code implementations • 28 Jan 2021 • Xiaochen Hong, Matthias Gillig, Richard Hentrich, Weiliang Yao, Vilmos Kocsis, Arthur R. Witte, Tino Schreiner, Danny Baumann, Nicolás Pérez, Anja U. B. Wolter, Yuan Li, Bernd Büchner, Christian Hess

We studied the field dependent thermal conductivity ($\kappa$) of Na$_2$Co$_2$TeO$_6$, a compound considered as the manifestation of the Kitaev model based on the high-spin $d^7$ Co$^{2+}$ ions.

Strongly Correlated Electrons

Revisiting the phase diagram of LaFe$_{1-x}$Co$_x$AsO on single crystals by thermodynamic methods

no code implementations • 14 Jan 2021 • Francesco Scaravaggi, Sven Sauerland, Liran Wang, Rhea Kappenberger, Piotr Lepucki, Adam P. Dioguardi, Xiaochen Hong, Federico Caglieris, Christoph Wuttke, Christian Hess, Hans-Joachim Grafe, Saicharan Aswartham, Sabine Wurmehl, Rüdiger Klingeler, Anja U. B. Wolter, Bernd Büchner

In this work we revisit the phase diagram of Co-doped LaFeAsO using single crystals and thermodynamic methods.

Superconductivity