TY - JOUR
T1 - Nearest neighbor hopping in Cd0.83Mn0.17Te:In, controlled by persistent photoconductivity
AU - Leighton, C.
AU - Terry, I.
AU - Becla, P.
N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 1999/5/11
Y1 - 1999/5/11
N2 - We have measured the temperature dependence of the electrical resistivity of a sample of the dilute magnetic persistent photoconductor Cd1-xMnxTe:In (x = 0.17) as a function of persistent photocarrier concentration. We observe a resistivity with the form ρ = ρ3 exp(E3/kBT) over the temperature range investigated (20-4 K), where E3 and ρ3 vary with the carrier density in a manner that suggests a nearest neighbor hopping transport mechanism. Magnetotransport measurements have also been made and we observe an anisotropic negative magnetoresistance (MR) at higher temperatures, which crosses over to a MR that is positive, and essentially isotropic, at low temperatures. We interpret this behavior as a cross over from a mechanism that is sensitive to the length of the nearest neighbor hop (an `orbital' effect) to a situation where the interaction between the localized electron and the magnetic ions of the host becomes important.
AB - We have measured the temperature dependence of the electrical resistivity of a sample of the dilute magnetic persistent photoconductor Cd1-xMnxTe:In (x = 0.17) as a function of persistent photocarrier concentration. We observe a resistivity with the form ρ = ρ3 exp(E3/kBT) over the temperature range investigated (20-4 K), where E3 and ρ3 vary with the carrier density in a manner that suggests a nearest neighbor hopping transport mechanism. Magnetotransport measurements have also been made and we observe an anisotropic negative magnetoresistance (MR) at higher temperatures, which crosses over to a MR that is positive, and essentially isotropic, at low temperatures. We interpret this behavior as a cross over from a mechanism that is sensitive to the length of the nearest neighbor hop (an `orbital' effect) to a situation where the interaction between the localized electron and the magnetic ions of the host becomes important.
UR - http://www.scopus.com/inward/record.url?scp=0032674270&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0032674270&partnerID=8YFLogxK
U2 - 10.1016/S0038-1098(99)00131-3
DO - 10.1016/S0038-1098(99)00131-3
M3 - Article
AN - SCOPUS:0032674270
SN - 0038-1098
VL - 110
SP - 531
EP - 536
JO - Solid State Communications
JF - Solid State Communications
IS - 10
ER -