PbSnCaTe films were prepared by molecular beam epitaxy (MBE). Hall measurement, X-ray diffraction (XRD) and Fourier transform infrared spectra (FTIR) measurement were performed to characterize the films. Undoped PbSnCaTe films were p type and they become n type by adding impurity Bi. XRD shows that the difference in lattice constants between PbSnCaTe and PbSnTe is negligibly small in the range of Ca ≤ 30. PbSnCaTe/PbSnTe superlattices were also prepared. According to FTIR, the heterostructure in PbSnCaTe/PbSnTe superlattices is type I.
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