Observation of Orbital Currents in CuO
| Autor: | Urs Staub, M. Garganourakis, Valerio Scagnoli, R. A. De Souza, Andrew T. Boothroyd, Stephen W. Lovesey, D. Prabhakaran, M. García-Fernández, Y. Bodenthin |
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| Rok vydání: | 2011 |
| Předmět: |
Superconductivity
Multidisciplinary Magnetic moment Condensed matter physics Chemistry Point reflection 02 engineering and technology 021001 nanoscience & nanotechnology Block (periodic table) 01 natural sciences Condensed Matter::Superconductivity 0103 physical sciences Antiferromagnetism Multiferroics Cuprate Condensed Matter::Strongly Correlated Electrons 010306 general physics 0210 nano-technology Magnetic dipole |
| Zdroj: | SCIENCE |
| DOI: | 10.1126/science.1201061 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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