Yanqiu Jiang

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A temperature-dependent extended x-ray-absorption fine structure investigation of La1−xCaxMnO3 is presented for the concentration range that spans the ferromagnetic-insulator FMI to ferromagnetic-metal FMM transition region, x=0.16, 0.18, 0.20, and 0.22; the titrated hole concentrations are slightly higher, y=0.2, 0.22, 0.24, and 0.25, respectively. For(More)
We report extended x-ray absorption fine-structure EXAFS studies of nand p-type Ba8Ga16Ge30 samples type-I clathrate at the Ga, Ge, and Ba K edges, to probe the local structure, particularly around the Ba atoms located inside 20and 24-atom cages Ba1 and Ba2 sites, respectively composed of Ga/Ge atoms. In agreement with diffraction analysis, we find Ba2 is(More)
The interface between organic semiconductor and graphene electrode, especially the structure of the first few molecular layers at the interface, is crucial for the device properties such as the charge transport in organic field effect transistors. In this work, we have used scanning tunneling microscopy to investigate the poly (3-octyl-thiophene)(More)
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