Thermoelectric power and electronic structures of Kondo insulators

Thermoelectric power of the Kondo insulators is analyzed theoretically. It is pointed out that Kelvin’s relation found in 1851 must be modified for insulators at low temperatures. A realistic tight-binding model is constructed for the description of the conduction bands of the most typical Kondo insulator YbB12. It will be a good starting point for the development of a realistic theory of the Kondo insulators with strong correlation