Absorption spectra and exciton g factor of InAs1âˆ' x N x nanowires in a magnetic field.

The electronic structures and absorption spectra of InAs_{1âˆ' x} N _x nanowires in the magnetic field are calculated via the combination of effective-mass theory and band anticrossing model, and the results exhibit the degenerate electron and hole states will be split by the magnetic field, which leads to the separation of σ ⁺ and σ ^âˆ' absorption spectra. Moreover, the calculations demonstrate the exciton g factor g _ex can undergo the transition from negative to positive with the size increasing, and g _ex is almost independent of the magnetic field, while decreasing slightly by enhancing the nitrogen content of InAs_{1âˆ' x} N _x nanowires. [ABSTRACT FROM AUTHOR]