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Lu, Yi
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article
Stabilization of three-dimensional charge order through interplanar orbital hybridization in PrxY1−xBa2Cu3O6+δ
Abstract
<jats:title>Abstract</jats:title><jats:p>The shape of 3<jats:italic>d</jats:italic>-orbitals often governs the electronic and magnetic properties of correlated transition metal oxides. In the superconducting cuprates, the planar confinement of the <jats:inline-formula><jats:alternatives><jats:tex-math>{d}_{{x}^{2}-{y}^{2}}</jats:tex-math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mrow><mml:mi>d</mml:mi></mml:mrow><mml:mrow><mml:msup><mml:mrow><mml:mi>x</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msup><mml:mo>−</mml:mo><mml:msup><mml:mrow><mml:mi>y</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:msub></mml:math></jats:alternatives></jats:inline-formula> orbital dictates the two-dimensional nature of the unconventional superconductivity and a competing charge order. Achieving orbital-specific control of the electronic structure to allow coupling pathways across adjacent planes would enable direct assessment of the role of dimensionality in the intertwined orders. Using Cu <jats:italic>L</jats:italic><jats:sub>3</jats:sub> and Pr <jats:italic>M</jats:italic><jats:sub>5</jats:sub> resonant x-ray scattering and first-principles calculations, we report a highly correlated three-dimensional charge order in Pr-substituted YBa<jats:sub>2</jats:sub>Cu<jats:sub>3</jats:sub>O<jats:sub>7</jats:sub>, where the Pr <jats:italic>f</jats:italic>-electrons create a direct orbital bridge between CuO<jats:sub>2</jats:sub> planes. With this we demonstrate that interplanar orbital engineering can be used to surgically control electronic phases in correlated oxides and other layered materials.</jats:p>