A simple tight-binding model description of the conduction band of the Kondo insulator YbB12

摘要: It is shown that the conduction band of typical Kondo insulator YbB12 can be expressed rather well by a simple tight-binding model 5de orbitals on Yb. The (ddσ) overlapping integral considered to produced hopping through B12 clusters. density states also calculated. If mixing with f-states properly taken into account, this useful starting point for incorporating strong correlation effect, and consistently explain all thermal, thermoelectric, transport magnetic properties YbB12.