Quasiparticle heat transport in the mixed state of high Tc superconductors
Mitsuaki Takigawa, Masanori Ichioka, Kazushige Machida
Abstract
The field dependence of low-temperature thermal conductivity κ(H) observed on cuprates is explained by calculating κ(H) microscopically. The heat current carried by low-lying quasiparticles around a vortex core decreases with H due to its depletion by the H-induced moment centered at a core for an underdoped case. This leads to a common and consistent picture on an ``anomalous core''. κ(H,T) is found to be a useful tool for probing quasiparticle structures in the mixed state in general.
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