Hydrostatic Pressure and Built-In Electric Field Effects on the Donor Impurity States in Cylindrical Wurtzite GaN/Al_xGa_1−xN Quantum Rings

Table 2

Band gaps (in units of eV), spontaneous polarization (in units of C/m²), elastic constants , , , and (in units of GPa), Phillips iconicity parameter , and the high frequency dielectric constant .

GaN	3.507^a	−0.034^a	390^b	145^b	106^b	398^b	0.5^a	5.20^a	5.39^a
AlN	6.230^a	−0.090^a	398^b	140^b	127^b	382^b	0.499^a	4.30^a	4.52^a

 ^aReference [7], ^breference [36].