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Witte, Bernd B\\\"uchner, Christian Hess, Danny Baumann, Matthias Gillig, Nicol\\'as P\\'erez, Richard Hentrich, Tino Schreiner, Vilmos Kocsis, Weiliang Yao, Xiaochen Hong, Yuan Li","submitted_at":"2021-01-28T18:58:57Z","abstract_excerpt":"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. We found that in-plane magnetic fields beyond a critical value $B_c \\approx$~10 T are able to drastically enhance $\\kappa$ at low temperatures, resulting in a double-peak structure of $\\kappa(T)$ that closely resembles the behavior of $\\alpha$-RuCl$_3$. 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