Abstract
Thermal behaviour of superconductors with complex order parameter symmetry is studied within a weak-coupling theory. It is shown numerically that the thermal nature of the different components of complex order parametrs are qualitatively different. Within the complex order parameter scenario, the recent experimental observations by Krishna et al. (Science, 277(1997) 83) on magnetothermal conductivity and by J. Ma et al.(Science, 267(1995) 862) on temperature-dependent gap anisotropy for high-temperature superconductors can have natural explanation.