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Electronic state of MgB2 superconductor
S.Tajima,T.Masui,H.Uchiyama,J.W.Quilty,Yu.Eltsev,S.Lee,A.Yamamoto,H.Mori 한국물리학회 2002 Current Applied Physics Vol.2 No.4
Thanks to the high quality single crystals of MgB2, we have measured various physical properties to extract important features ofthe electronic state in this superconductor. The electron density maps calculated from a precise X-ray diraction analysis and theband dispersions determined by the angle-resolved photoemission spectroscopy demonstrate that the boron orbitals play a centraldicated in resistivity and Raman scattering spectra. Although the multi-band structure signicantly aects various normal stateproperties, no clear multi-gap feature can be observed in the Raman scattering spectra belowTc.. 2002 Elsevier Science B.V. All rights reserved.