The anomaly in the thermal conductivity κ of La2-xSrxCuO4 is very sensitive to field B. Below 14 Tesla, it is quite well described by Y(x) = ψ(1/2 + 1/2) + 1n(x) where ψ(x) is the digamma function. The experiment suggests that the field suppression is a quantum decoherence effect involving quasi-particles diffusing in the disordered CuO2 plane. Understanding how B affects qp diffusion may provide a sensitive probe of coherence effects using the heat current.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering