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Effect of controlled disorder on quasiparticle thermal transport in Bi$_2$Sr$_2$CaCu$_2$O$_8$

S. Nakamae·K. Behnia·L. Balicas·F. Rullier-Albenque·H. Berger·T. Tamegai
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Abstract

Low temperature thermal conductivity, $κ$, of optimally-doped Bi2212 was studied before and after the introduction of point defects by electron irradiation. The amplitude of the linear component of $κ$ remains unchanged, confirming the universal nature of heat transport by zero-energy quasiparticles. The induced decrease in the absolute value of $κ$ at finite temperatures allows us to resolve a nonuniversal term in $κ$ due to conduction by finite-energy quasiparticles. The magnitude of this term provides an estimate of the quasiparticle lifetime at subkelvin temperatures.

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S. Nakamae, K. Behnia, L. Balicas, F. Rullier-Albenque, H. Berger, T. Tamegai. 2000-12-06. Effect of controlled disorder on quasiparticle thermal transport in Bi$_2$Sr$_2$CaCu$_2$O$_8$. https://doi.org/10.1103/physrevb.63.184509

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