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Observation of Orbital Currents in CuO

DOI: 10.1126/science.1201061 DOI Help
PMID: 21474711 PMID Help

Authors: V. Scagnoli (Paul Scherrer Institut) , U. Staub (Paul Scherrer Inst) , Y. Bodenthin (Swiss Light Source) , R. De Souza (Paul Scherrer Institut) , M. García-fernández (Swiss Light Source) , M. Garganourakis (Paul Scherrer Institute) , A. T. Boothroyd (University of Oxford) , D. Prabhakaran (University of Oxford) , S. W. Lovesey (Diamond Light Source; ISIS Facility)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Science , VOL 332

State: Published (Approved)
Published: May 2011

Abstract: Orbital currents are proposed to be the order parameter of the pseudo-gap phase of cuprate high-temperature superconductors. We used resonant x-ray diffraction to observe orbital currents in a copper-oxygen plaquette, the basic building block of cuprate superconductors. The confirmation of the existence of orbital currents is an important step toward the understanding of the cuprates as well as materials lacking inversion symmetry, such as magnetically induced multiferroics. Although observed in the antiferromagnetic state of cupric oxide, we show that orbital currents can occur even in the absence of long-range magnetic moment ordering.

Subject Areas: Physics

Instruments: I16-Materials and Magnetism

Added On: 16/05/2011 16:35

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