(a) Schematic of (BN)n/Cm/(BN)n quantum-well structure. Carbon, nitrogen, and boron atoms are represented by black, blue, and red balls, respectively. (b)–(e) The induced charge density distributions at the energy resonance point 0.72 eV for (b) (BN)1/C6/(BN)1, (c) (BN)2/C6/(BN)2, (d) (BN)4/C6/(BN)4, (e) (BN)6/C6/(BN)6. |