A ‘checkerboard’ electronic crystal state in lightly hole-doped Ca2-xNaxCuO2Cl2.
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| Title: | A ‘checkerboard’ electronic crystal state in lightly hole-doped Ca |
|---|---|
| Authors: | Hanagud, T., Luplen, C., Kohsaka, Y., Lee, D.-H., Azuma, M., Takano, M., Takagl, H., Davis, J. C. |
| Source: | Nature. 8/26/2004, Vol. 430 Issue 7003, p1001-1005. 5p. |
| Subjects: | Phase diagrams, Copper, Oxides, Spectrum analysis, Electronic structure, Superconductors |
| Abstract: | The phase diagram of hole-doped copper oxides shows four different electronic phases existing at zero temperature. Familiar among these are the Mott insulator, high-transition-temperature superconductor and metallic phases. A fourth phase, of unknown identity, occurs at light doping along the zero-temperature bound of the ‘pseudogap’ regime. This regime is rich in peculiar electronic phenomena, prompting numerous proposals that it contains some form of hidden electronic order. Here we present low-temperature electronic structure imaging studies of a lightly hole-doped copper oxide: Ca2-xNaxCuO2Cl2. Tunnelling spectroscopy (at energies |E| > 100?meV) reveals electron extraction probabilities greatly exceeding those for injection, as anticipated for a doped Mott insulator. However, for |E| < 100?meV, the spectrum exhibits a V-shaped energy gap centred on E = 0. States within this gap undergo intense spatial modulations, with the spatial correlations of a four CuO2-unit-cell square ‘checkerboard’, independent of energy. Intricate atomic-scale electronic structure variations also exist within the checkerboard. These data are consistent with an unanticipated crystalline electronic state, possibly the hidden electronic order, existing in the zero-temperature pseudogap regime of Ca2-xNaxCuO2Cl2. [ABSTRACT FROM AUTHOR] |
| Copyright of Nature is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Psychology and Behavioral Sciences Collection |
| FullText | Links: – Type: pdflink Text: Availability: 0 |
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| Header | DbId: pbh DbLabel: Psychology and Behavioral Sciences Collection An: 14262453 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: A ‘checkerboard’ electronic crystal state in lightly hole-doped Ca<subscript>2-x</subscript>Na<subscript>x</subscript>CuO<subscript>2</subscript>Cl<subscript>2</subscript>. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Hanagud%2C+T%2E%22">Hanagud, T.</searchLink><br /><searchLink fieldCode="AR" term="%22Luplen%2C+C%2E%22">Luplen, C.</searchLink><br /><searchLink fieldCode="AR" term="%22Kohsaka%2C+Y%2E%22">Kohsaka, Y.</searchLink><br /><searchLink fieldCode="AR" term="%22Lee%2C+D%2E-H%2E%22">Lee, D.-H.</searchLink><br /><searchLink fieldCode="AR" term="%22Azuma%2C+M%2E%22">Azuma, M.</searchLink><br /><searchLink fieldCode="AR" term="%22Takano%2C+M%2E%22">Takano, M.</searchLink><br /><searchLink fieldCode="AR" term="%22Takagl%2C+H%2E%22">Takagl, H.</searchLink><br /><searchLink fieldCode="AR" term="%22Davis%2C+J%2E+C%2E%22">Davis, J. C.</searchLink> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Nature%22">Nature</searchLink>. 8/26/2004, Vol. 430 Issue 7003, p1001-1005. 5p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Phase+diagrams%22">Phase diagrams</searchLink><br /><searchLink fieldCode="DE" term="%22Copper%22">Copper</searchLink><br /><searchLink fieldCode="DE" term="%22Oxides%22">Oxides</searchLink><br /><searchLink fieldCode="DE" term="%22Spectrum+analysis%22">Spectrum analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Electronic+structure%22">Electronic structure</searchLink><br /><searchLink fieldCode="DE" term="%22Superconductors%22">Superconductors</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The phase diagram of hole-doped copper oxides shows four different electronic phases existing at zero temperature. Familiar among these are the Mott insulator, high-transition-temperature superconductor and metallic phases. A fourth phase, of unknown identity, occurs at light doping along the zero-temperature bound of the ‘pseudogap’ regime. This regime is rich in peculiar electronic phenomena, prompting numerous proposals that it contains some form of hidden electronic order. Here we present low-temperature electronic structure imaging studies of a lightly hole-doped copper oxide: Ca2-xNaxCuO2Cl2. Tunnelling spectroscopy (at energies |E| > 100?meV) reveals electron extraction probabilities greatly exceeding those for injection, as anticipated for a doped Mott insulator. However, for |E| < 100?meV, the spectrum exhibits a V-shaped energy gap centred on E = 0. States within this gap undergo intense spatial modulations, with the spatial correlations of a four CuO2-unit-cell square ‘checkerboard’, independent of energy. Intricate atomic-scale electronic structure variations also exist within the checkerboard. These data are consistent with an unanticipated crystalline electronic state, possibly the hidden electronic order, existing in the zero-temperature pseudogap regime of Ca2-xNaxCuO2Cl2. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Nature is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1038/nature02861 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 5 StartPage: 1001 Subjects: – SubjectFull: Phase diagrams Type: general – SubjectFull: Copper Type: general – SubjectFull: Oxides Type: general – SubjectFull: Spectrum analysis Type: general – SubjectFull: Electronic structure Type: general – SubjectFull: Superconductors Type: general Titles: – TitleFull: A ‘checkerboard’ electronic crystal state in lightly hole-doped Ca2-xNaxCuO2Cl2. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Hanagud, T. – PersonEntity: Name: NameFull: Luplen, C. – PersonEntity: Name: NameFull: Kohsaka, Y. – PersonEntity: Name: NameFull: Lee, D.-H. – PersonEntity: Name: NameFull: Azuma, M. – PersonEntity: Name: NameFull: Takano, M. – PersonEntity: Name: NameFull: Takagl, H. – PersonEntity: Name: NameFull: Davis, J. C. IsPartOfRelationships: – BibEntity: Dates: – D: 26 M: 08 Text: 8/26/2004 Type: published Y: 2004 Identifiers: – Type: issn-print Value: 00280836 Numbering: – Type: volume Value: 430 – Type: issue Value: 7003 Titles: – TitleFull: Nature Type: main |
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