We find that layered materials composed of various oxides of cations with s2 electronic configuration, XY2O4, X = in or Sc, Y = Ga, Zn, Al, Cd and/or Mg, exhibit isotropic electron effective mass which can be obtained via averaging over those of the corresponding single-cation oxide constituents. This effect is due to a hybrid nature of the conduction band formed from the s-states of all cations and the oxygen p-states. Moreover, the observed insensitivity of the electron effective mass to the oxygen coordination and to the distortions in the cation-oxygen chains suggests that a similar behavior can be expected in the technologically important amorphous state. These findings significantly broaden the range of materials as efficient transparent conductor hosts.
J. E. Medvedeva, "Averaging of the Electron Effective Mass in Multicomponent Transparent Conducting Oxides," Europhysics Letters, Institute of Physics - IOP Publishing, Jan 2007.
The definitive version is available at https://doi.org/10.1209/0295-5075/78/57004
Keywords and Phrases
Averaging; Electron Effective Mass
Article - Journal
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