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Discovery of mesoscopic nematicity wave in iron-based superconductors.

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Title: Discovery of mesoscopic nematicity wave in iron-based superconductors.
Authors: Shimojima, T., Motoyui, Y., Taniuchi, T., Bareille, C., Onari, S., Kontani, H., Nakajima, M., Kasahara, S., Shibauchi, T., Matsuda, Y., Shin, S.
Source: Science (pre-March 2025). 9/3/2021, Vol. 373 Issue 6559, p1122-1125. 4p. 2 Diagrams, 2 Graphs.
Subjects: Mesoscopic phenomena (Physics), Iron-based superconductors, Momentum space, Linear dichroism, Electron microscopes, Photoemission, Domain walls (Ferromagnetism)
Abstract: Nematicity is ubiquitous in the electronic phases of iron-based superconductors. The order parameter that characterizes the nematic phase has been investigated in momentum space, but its real-space arrangement remains largely unexplored. We use linear dichroism (LD) in a low-temperature laserÐ photoemission electron microscope to map out the nematic order parameter of nonmagentic FeSe and antiferromagnetic BaFe2(As0.87P0.13)2. In contrast to structural domains, which have atomic-scale domain walls, the LD patterns in both materials show peculiar sinusoidal waves of electronic nematicity with wavelengths more than 1000 times as long as the unit cell. Our findings put strong constraints on the theoretical investigation of electronic nematicity. [ABSTRACT FROM AUTHOR]
Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science 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
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PubType: Academic Journal
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  Data: Discovery of mesoscopic nematicity wave in iron-based superconductors.
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  Data: <searchLink fieldCode="AR" term="%22Shimojima%2C+T%2E%22">Shimojima, T.</searchLink><br /><searchLink fieldCode="AR" term="%22Motoyui%2C+Y%2E%22">Motoyui, Y.</searchLink><br /><searchLink fieldCode="AR" term="%22Taniuchi%2C+T%2E%22">Taniuchi, T.</searchLink><br /><searchLink fieldCode="AR" term="%22Bareille%2C+C%2E%22">Bareille, C.</searchLink><br /><searchLink fieldCode="AR" term="%22Onari%2C+S%2E%22">Onari, S.</searchLink><br /><searchLink fieldCode="AR" term="%22Kontani%2C+H%2E%22">Kontani, H.</searchLink><br /><searchLink fieldCode="AR" term="%22Nakajima%2C+M%2E%22">Nakajima, M.</searchLink><br /><searchLink fieldCode="AR" term="%22Kasahara%2C+S%2E%22">Kasahara, S.</searchLink><br /><searchLink fieldCode="AR" term="%22Shibauchi%2C+T%2E%22">Shibauchi, T.</searchLink><br /><searchLink fieldCode="AR" term="%22Matsuda%2C+Y%2E%22">Matsuda, Y.</searchLink><br /><searchLink fieldCode="AR" term="%22Shin%2C+S%2E%22">Shin, S.</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Science+%28pre-March+2025%29%22">Science (pre-March 2025)</searchLink>. 9/3/2021, Vol. 373 Issue 6559, p1122-1125. 4p. 2 Diagrams, 2 Graphs.
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  Data: <searchLink fieldCode="DE" term="%22Mesoscopic+phenomena+%28Physics%29%22">Mesoscopic phenomena (Physics)</searchLink><br /><searchLink fieldCode="DE" term="%22Iron-based+superconductors%22">Iron-based superconductors</searchLink><br /><searchLink fieldCode="DE" term="%22Momentum+space%22">Momentum space</searchLink><br /><searchLink fieldCode="DE" term="%22Linear+dichroism%22">Linear dichroism</searchLink><br /><searchLink fieldCode="DE" term="%22Electron+microscopes%22">Electron microscopes</searchLink><br /><searchLink fieldCode="DE" term="%22Photoemission%22">Photoemission</searchLink><br /><searchLink fieldCode="DE" term="%22Domain+walls+%28Ferromagnetism%29%22">Domain walls (Ferromagnetism)</searchLink>
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  Data: Nematicity is ubiquitous in the electronic phases of iron-based superconductors. The order parameter that characterizes the nematic phase has been investigated in momentum space, but its real-space arrangement remains largely unexplored. We use linear dichroism (LD) in a low-temperature laserÐ photoemission electron microscope to map out the nematic order parameter of nonmagentic FeSe and antiferromagnetic BaFe2(As0.87P0.13)2. In contrast to structural domains, which have atomic-scale domain walls, the LD patterns in both materials show peculiar sinusoidal waves of electronic nematicity with wavelengths more than 1000 times as long as the unit cell. Our findings put strong constraints on the theoretical investigation of electronic nematicity. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science 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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        Value: 10.1126/science.abd6701
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      – SubjectFull: Momentum space
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      – SubjectFull: Domain walls (Ferromagnetism)
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              Text: 9/3/2021
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              Y: 2021
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