期刊
PHYSICAL REVIEW B
卷 62, 期 2, 页码 1039-1043出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.62.1039
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Direct electronic structure measurements of a variety of colossal magnetoresistive (CMR) oxides show the presence of a pseudogap at the Fermi energy E-F which drastically suppresses the electron spectral function at E-F. The pseudogap is a strong function of the layer number of the samples (sample dimensionality) and is strongly temperature dependent, with the changes beginning at the ferromagnetic transition temperature T-c. These trends are consistent with the major transport trends of the CMR oxides, implying a direct relationship between the pseudogap and transport, including the colossal conductivity changes which occur across T-c. The k dependence of the temperature-dependent effects indicates that the pseudogap observed in these compounds is not due to the extrinsic effects proposed by Joynt.
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