Chemical trends of the band gaps of idealized crystal of semiconducting silicon clathrates, M8Si38A8 (M = Na, K, Rb, Cs; A = Ga, Al, In), predicted by first-principle pseudopotential calculations
(Chemical trends of the band gaps of idealized crystal of semiconducting silicon clathrates, M8Si38A8 (M=Na, K, Rb, Cs; A=Ga, Al, In), predicted by first-principle pseudopotential calculations)