Scanning Tunneling Spectroscopy on Pr0.68Pb0.32MnO3 single crystals
Data(s) |
01/06/2007
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Resumo |
Scanning tunneling microscopy/spectroscopy studies were carried out on single crystals of colossal magnetoresistive manganite Pr0.68Pb0.32MnO3 at different temperatures in order to probe their spatial homogeneity across the metal-insulator transition temperature TM-I(similar to 255 K). A metallic behavior of the local conductance was observed for temperatures T < TM-I. Zero bias conductance (dI/dV)v=(0), which is directly proportional to the local surface density of states at the Fermi level, shows a single distribution at temperatures T < 200 K suggesting a homogeneous electronic phase at low temperatures. In a narrow temperature window of 200 K < T < TM-I, however, an inhomogeneous distribution of (dI/dV)v=(0) has been observed. This result gives evidence for phase separation in the transition region in this compound. |
Formato |
application/pdf |
Identificador |
http://eprints.iisc.ernet.in/26778/1/pdf2.pdf Roessler, S and Ernst, S and Padmanabhan, B and Elizabeth, Suja and Bhat, H L and Wirth, S and Steglich, F (2007) Scanning Tunneling Spectroscopy on Pr0.68Pb0.32MnO3 single crystals. In: 10th Joint Magnetism and Magnetic Materials Conference/International Magnetics Conference, JAN 07-11, 2007, Baltimore. |
Publicador |
IEEE |
Relação |
http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=4202891&tag=1 http://eprints.iisc.ernet.in/26778/ |
Palavras-Chave | #Physics |
Tipo |
Conference Paper PeerReviewed |