TY - JOUR
T1 - CPA density of states and conductivity in a double-exchange system containing impurities
AU - Auslender, M.
AU - Kogari, E.
PY - 2001/2/2
Y1 - 2001/2/2
N2 - We study density of states and conductivity of the doped double-exchange system, treating interaction of charge carriers both with the localized spins and with the impurities in the coherent potential approximation. It is shown that under appropriate conditions there is a gap between the conduction band and the impurity band in paramagnetic phase, while the density of states is gapless in ferromagnetic phase This can explain metal-insulator transition frequently observed in manganites and magnetic semiconductors. Activated conductivity in the insulator phase is numerically calculated.
AB - We study density of states and conductivity of the doped double-exchange system, treating interaction of charge carriers both with the localized spins and with the impurities in the coherent potential approximation. It is shown that under appropriate conditions there is a gap between the conduction band and the impurity band in paramagnetic phase, while the density of states is gapless in ferromagnetic phase This can explain metal-insulator transition frequently observed in manganites and magnetic semiconductors. Activated conductivity in the insulator phase is numerically calculated.
KW - 72.10.-d Theory of electronic transport; scattering mechanisms
KW - 75.30.Vn Colossal magnetoresistance
KW - 75.50.Pp Magnetic semiconductors
UR - http://www.scopus.com/inward/record.url?scp=0001282481&partnerID=8YFLogxK
U2 - 10.1007/s100510170298
DO - 10.1007/s100510170298
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SN - 1434-6028
VL - 19
SP - 525
EP - 529
JO - European Physical Journal B
JF - European Physical Journal B
IS - 4
ER -