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Orbital susceptibilities of PbSe quantum dots
W B Jian1, Weigang Lu, Jiye Fang
1Department of Electrophysics, National Chiao Tung University, Taiwan, Republic of China. wbjian@mail.nctu.edu.tw
Abstract:
Different sizes of three-dimensional PbSe quantum dots have been synthesized for the study of orbital magnetic susceptibilities. Two types of orbital susceptibilities have been found, including the Curie susceptibility and finite-size corrections to the Landau susceptibility. The Curie term of a quantum dot manifests itself in the temperature dependence of magnetic susceptibility at low temperatures, while the field dependence of differential susceptibility at high temperatures shows finite-size corrections to the Landau susceptibility. Both of the two kinds of orbital susceptibility, estimated per quantum dot, show linear dependence on the size.
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