Neutron Structural analysis of La_<1-x>Sr_xMnO_3 : Variation of One-Electron Bandwidth W with Hole Doping

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Abstract

We have performed neutron powder diffraction measurements for La<SUB>1−<I>x</I></SUB>Sr<I><SUB>x</SUB></I>MnO<SUB>3</SUB> (<I>x</I>=0.00–0.20) at room temperature. We have found that the crystal structure is orthorhombic (<I>Pbnm</I>, <I>Z</I>=4; O) at <I>x</I>≤0.14 and rhombohedral (<I>R</I>\\bar3<I>c</I>, <I>Z</I>=2; R) at <I>x</I>≥0.18, respectively. At this structural phase transition, the averaged Mn–O–Mn bond angle ⟨θ⟩ discontinuously increases from 160.8° at <I>x</I>=0.14 to 163.5° at <I>x</I>=0.18. We have estimated relative variation of the one-electron bandwidth <I>W</I> of the <I>e</I><SUB>g</SUB>-band, and discussed the insulator-metal behavior induced by hole doping.

Journal

  • Journal of the Physical Society of Japan

    Journal of the Physical Society of Japan 72(3), 709-712, 2003-03-15

    The Physical Society of Japan (JPS)

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Codes

  • NII Article ID (NAID)
    110001974281
  • NII NACSIS-CAT ID (NCID)
    AA00704814
  • Text Lang
    ENG
  • Article Type
    ART
  • ISSN
    00319015
  • NDL Article ID
    6479830
  • NDL Source Classification
    ZM35(科学技術--物理学)
  • NDL Call No.
    Z53-A404
  • Data Source
    CJP  NDL  NII-ELS  J-STAGE 
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