Phase Separation in Electron Doped Iron-Selenide KFeSe Superconductor by Scanning X-ray Nano-Diffraction.
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| Title: | Phase Separation in Electron Doped Iron-Selenide KFeSe Superconductor by Scanning X-ray Nano-Diffraction. |
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| Authors: | Ricci, A. phd.alessandro.ricci@gmail.com, Poccia, N.1, Joseph, B.1, Campi, G.2, Bianconi, A.1 antonio.bianconi@uniroma1.it |
| Source: | Journal of Superconductivity & Novel Magnetism. Jul2012, Vol. 25 Issue 5, p1383-1387. 5p. 1 Diagram, 3 Graphs. |
| Subjects: | Superconductivity, Phase separation method (Engineering), X-ray diffractometers, Selenides, Semiconductor doping |
| Abstract: | A new family of high temperature superconductors, the heavily electron doped iron-selenides, like KFeSe, has been attracting high interest since they show both 30 K superconductivity, with missing hole pockets questioning the s pairing model, and unusually high magnetic moments. The hot debate is between coexistence versus phase separation and on the possible divergence of surface from bulk structure. Here, we provide direct evidence for a nanoscale phase separation in a single crystal of KFeSe, where a first magnetic phase, with superlattice modulation $(\sqrt{5}\times\sqrt{5})$, coexists with a second nonmagnetic phase, with a second superlattice modulation ( $\sqrt{2} \times\sqrt{2}$), below 520 K using transmission X-ray diffraction. The mapping of the spatial distribution of the two phases is measured by scanning X-ray nanodiffraction using a 300×300 nm X-ray spot. The complex spatial phase separation clarifies the coexistence of superconductivity and magnetism in the same sample. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Superconductivity & Novel Magnetism 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: | Engineering Source |
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| Items | – Name: Title Label: Title Group: Ti Data: Phase Separation in Electron Doped Iron-Selenide KFeSe Superconductor by Scanning X-ray Nano-Diffraction. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Ricci%2C+A%2E%22">Ricci, A.</searchLink><i> phd.alessandro.ricci@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Poccia%2C+N%2E%22">Poccia, N.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Joseph%2C+B%2E%22">Joseph, B.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Campi%2C+G%2E%22">Campi, G.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Bianconi%2C+A%2E%22">Bianconi, A.</searchLink><relatesTo>1</relatesTo><i> antonio.bianconi@uniroma1.it</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Superconductivity+%26+Novel+Magnetism%22">Journal of Superconductivity & Novel Magnetism</searchLink>. Jul2012, Vol. 25 Issue 5, p1383-1387. 5p. 1 Diagram, 3 Graphs. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Superconductivity%22">Superconductivity</searchLink><br /><searchLink fieldCode="DE" term="%22Phase+separation+method+%28Engineering%29%22">Phase separation method (Engineering)</searchLink><br /><searchLink fieldCode="DE" term="%22X-ray+diffractometers%22">X-ray diffractometers</searchLink><br /><searchLink fieldCode="DE" term="%22Selenides%22">Selenides</searchLink><br /><searchLink fieldCode="DE" term="%22Semiconductor+doping%22">Semiconductor doping</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: A new family of high temperature superconductors, the heavily electron doped iron-selenides, like KFeSe, has been attracting high interest since they show both 30 K superconductivity, with missing hole pockets questioning the s pairing model, and unusually high magnetic moments. The hot debate is between coexistence versus phase separation and on the possible divergence of surface from bulk structure. Here, we provide direct evidence for a nanoscale phase separation in a single crystal of KFeSe, where a first magnetic phase, with superlattice modulation $(\sqrt{5}\times\sqrt{5})$, coexists with a second nonmagnetic phase, with a second superlattice modulation ( $\sqrt{2} \times\sqrt{2}$), below 520 K using transmission X-ray diffraction. The mapping of the spatial distribution of the two phases is measured by scanning X-ray nanodiffraction using a 300×300 nm X-ray spot. The complex spatial phase separation clarifies the coexistence of superconductivity and magnetism in the same sample. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Superconductivity & Novel Magnetism 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: 10.1007/s10948-012-1524-2 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 5 StartPage: 1383 Subjects: – SubjectFull: Superconductivity Type: general – SubjectFull: Phase separation method (Engineering) Type: general – SubjectFull: X-ray diffractometers Type: general – SubjectFull: Selenides Type: general – SubjectFull: Semiconductor doping Type: general Titles: – TitleFull: Phase Separation in Electron Doped Iron-Selenide KFeSe Superconductor by Scanning X-ray Nano-Diffraction. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Ricci, A. – PersonEntity: Name: NameFull: Poccia, N. – PersonEntity: Name: NameFull: Joseph, B. – PersonEntity: Name: NameFull: Campi, G. – PersonEntity: Name: NameFull: Bianconi, A. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 07 Text: Jul2012 Type: published Y: 2012 Identifiers: – Type: issn-print Value: 15571939 Numbering: – Type: volume Value: 25 – Type: issue Value: 5 Titles: – TitleFull: Journal of Superconductivity & Novel Magnetism Type: main |
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