Magnon Heat Transport in doped $\mathrm{L}{\mathrm{a}}_2\mathrm{Cu}{\mathrm{O}}_4$

C. Hess, B. Büchner, U. Ammerahl +4

We present results of the thermal conductivity of $\mathrm{L}{\mathrm{a}}_2\mathrm{Cu}{\mathrm{O}}_4$ and $\mathrm{L}{\mathrm{a}}_{1.8}\mathrm{E}{\mathrm{u}}_{0.2}\mathrm{Cu}{\mathrm{O}}_4$ single-crystals which represent model systems for the two-dimensional spin-1/2 Hei…