Optical probe of anisotropic and incoherent charge dynamics in a layered ferromagnet:<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>La</mml:mi></mml:mrow><mml:mrow><mml:mn>1.2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi>Sr</mml:mi></mml:mrow><mml:mrow><mml:mn>1.8</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi>Mn</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi>O</mml:mi></mml:mrow><mml:mrow><mml:mn>7</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>

DOI Web Site Web Site 被引用文献5件

書誌事項

公開日
1998-04-01
権利情報
  • http://link.aps.org/licenses/aps-default-license
DOI
  • 10.1103/physrevb.57.r8079
公開者
American Physical Society (APS)

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説明

Highly anisotropic optical conductivity spectra and their temperature variation have been investigated for a layered ferromagnetic ${(T}_{\mathrm{c}}$=121 K) crystal of La${}_{2\ensuremath{-}2x}$Sr${}_{1+2x}$Mn${}_{2}$O${}_{7}$ $(x$=0.4). The in-plane spectra show conspicuous spectral-weight transfer over an energy region of 0\char21{}3 eV with evolution of spin polarization below ${T}_{\mathrm{c}}$ and in the ferromagnetic, highly conducting ground state form a prominent peak structure around 0.4 eV with minimal Drude weight. By contrast, the $c$-axis spectra show little change with temperature and remain insulatorlike. The results indicate highly incoherent dynamics of the fully quasi-two dimensional spin-polarized carriers.

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  • Physical Review B

    Physical Review B 57 (14), R8079-R8082, 1998-04-01

    American Physical Society (APS)

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