Thermal Conductivity In Ab Plane Research Articles

Influence of magnetic field on thermal conductivity of La2－xSrxCuO4 single crystals

We have measured the temperature dependence of thermal conductivity in the ab_plane as well as c_axis of a series of underdoped La2-xSrxCuO4 (x=0063, 0070, 0090, 0110, 0125) single crystals unde r ze ro and 14 T magnetic field. It is found that the thermal conductivity in both ab plane and c-axis are suppressed by the application of the magnetic fiel d parallel to the c-axis. Ｔhe temperature dependence of the thermal conduct ivity suppression is quite similar to the previously reported behavior of the an tiferromagnetic order induced by an applied magnetic field. We think that the fi eld_induced thermal conductivity suppression in ab plane is due to the elect ronic contribution, while along c-axis it is due to the phonon contribution. Both the suppressions of the thermal conductivity in ab plane and along c-axis probably originate from the field-enhanced charge and spin ordering.