Abstract
The influence of nitrogen cluster states on the conduction band (CB) structure of GaAs1−xNx is probed by measuring the effective mass and gyromagnetic ratio of electrons for x < 0.7%. An unusual compositional dependence of these two important CB parameters is found. Such behaviors are well reproduced by a modified k⋅p model taking into account a non‐monotonic loss of Γ character of the CB minimum due to multiple crossings between the red‐shifting conduction band edge and N cluster states. As well, sudden variations in the electron mass can be externally induced by applying a hydrostatic pressure, which brings the upward moving CB edge into interaction with N states, which at ambient pressure are resonant with the GaAs1−xNx CB continuum.
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