Excitonic dispersion of the intermediate spin state in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>LaCoO</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:math> revealed by resonant inelastic x-ray scattering

DOI DOI Web Site Web Site 被引用文献6件 参考文献42件

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公開日
2018-07-31
資源種別
journal article
権利情報
  • https://link.aps.org/licenses/aps-default-license
DOI
  • 10.1103/physrevb.98.035149
  • 10.48550/arxiv.1712.04906
公開者
American Physical Society (APS)

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説明

More than 50 years ago the electron-hole attraction was proposed to drive narrow gap semiconductors or semimetals to a new phase, the excitonic insulator. The experimental proof of its existence in bulk materials remains elusive. In strongly correlated insulators, the proximity of the excitonic insulator phase is reflected by the presence of dispersive electron-hole excitations with a small gap above a singlet ground state. Recently, such an excitation spectrum was proposed to be realized in perovskite oxide LaCoO$_3$. In this Letter we use Co $L_3$-edge resonant inelastic X-ray scattering to put this proposal to experimental test.

収録刊行物

  • Physical Review B

    Physical Review B 98 (3), 2018-07-31

    American Physical Society (APS)

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