TY - JOUR
T1 - Study of the transport properties of La1.85-xSr0.15+xCu1-xMxOy (M = Fe, Ga)
AU - Xu, Gaojie
AU - Mao, Zhiqiang
AU - Jin, Hao
AU - Yan, Hongjie
AU - Zhang, Yuheng
PY - 1998/11/23
Y1 - 1998/11/23
N2 - The normal-state transport properties of Fe and Ga doped La-Sr-Cu-O samples have been investigated by means of resistivity and thermoelectric power measurements. Fe and Ga dopings have a similar influence on the resistivity, i.e., the residual resistivity and MI transition temperature increase gradually with the increase of dopant. However, for their TEP results there exists a great difference. Fe doping leads to the broad peak in S-T curves shifting up to high temperature, while for the Ga doped system, the location of the peaks is nearly unchanged, similar to that of the Zn doped LSCO system. The results are accounted for in terms of the vibronic coupling of electrons to optical-mode lattice vibrations. The structure factor as another possible reason influencing TEP is also discussed in the paper.
AB - The normal-state transport properties of Fe and Ga doped La-Sr-Cu-O samples have been investigated by means of resistivity and thermoelectric power measurements. Fe and Ga dopings have a similar influence on the resistivity, i.e., the residual resistivity and MI transition temperature increase gradually with the increase of dopant. However, for their TEP results there exists a great difference. Fe doping leads to the broad peak in S-T curves shifting up to high temperature, while for the Ga doped system, the location of the peaks is nearly unchanged, similar to that of the Zn doped LSCO system. The results are accounted for in terms of the vibronic coupling of electrons to optical-mode lattice vibrations. The structure factor as another possible reason influencing TEP is also discussed in the paper.
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U2 - 10.1016/S0375-9601(98)00692-6
DO - 10.1016/S0375-9601(98)00692-6
M3 - Article
AN - SCOPUS:0038936724
SN - 0375-9601
VL - 249
SP - 153
EP - 159
JO - Physics Letters, Section A: General, Atomic and Solid State Physics
JF - Physics Letters, Section A: General, Atomic and Solid State Physics
IS - 1-2
ER -