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Magnetic correlations in the pressure-induced superconductor CrAs investigated by $^{75}$As nuclear magnetic resonance

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Title: Magnetic correlations in the pressure-induced superconductor CrAs investigated by $^{75}$As nuclear magnetic resonance
Authors: Matsushima, Kei, Kotegawa, Hisashi, Kuwata, Yoshiki, Tou, Hideki, Kaneyoshi, Jun, Matsuoka, Eiichi, Sugawara, Hitoshi, Sakurai, Takahiro, Ohta, Hitoshi, Harima, Hisatomo
Source: Phys. Rev. B 100, 100501(R) (2019)
Publication Year: 2019
Collection: Condensed Matter
Subject Terms: Condensed Matter - Superconductivity, Condensed Matter - Strongly Correlated Electrons
More Details: We report $^{75}$As-NMR results for CrAs under pressure, which shows superconductivity adjoining a helimagnetically ordered state. We successfully evaluated the Knight shift from the spectrum, which is strongly affected by the quadrupole interaction. The Knight shift shows the remarkable feature that the uniform spin susceptibility increases toward low temperatures in the paramagnetic state. This is in sharp contrast to CrAs at ambient pressure, and also to cuprates and Fe pnictides, where antiferromagnetic correlations are dominant. Superconductivity emerges in CrAs under unique magnetic correlations, which probably originate in the three-dimensional zigzag structure of its nonsymmorphic symmetry.
Comment: 5 pages, 4 figures
Document Type: Working Paper
DOI: 10.1103/PhysRevB.100.100501
Access URL: http://arxiv.org/abs/1909.13416
Accession Number: edsarx.1909.13416
Database: arXiv
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  Data: Magnetic correlations in the pressure-induced superconductor CrAs investigated by $^{75}$As nuclear magnetic resonance
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  Data: <searchLink fieldCode="AR" term="%22Matsushima%2C+Kei%22">Matsushima, Kei</searchLink><br /><searchLink fieldCode="AR" term="%22Kotegawa%2C+Hisashi%22">Kotegawa, Hisashi</searchLink><br /><searchLink fieldCode="AR" term="%22Kuwata%2C+Yoshiki%22">Kuwata, Yoshiki</searchLink><br /><searchLink fieldCode="AR" term="%22Tou%2C+Hideki%22">Tou, Hideki</searchLink><br /><searchLink fieldCode="AR" term="%22Kaneyoshi%2C+Jun%22">Kaneyoshi, Jun</searchLink><br /><searchLink fieldCode="AR" term="%22Matsuoka%2C+Eiichi%22">Matsuoka, Eiichi</searchLink><br /><searchLink fieldCode="AR" term="%22Sugawara%2C+Hitoshi%22">Sugawara, Hitoshi</searchLink><br /><searchLink fieldCode="AR" term="%22Sakurai%2C+Takahiro%22">Sakurai, Takahiro</searchLink><br /><searchLink fieldCode="AR" term="%22Ohta%2C+Hitoshi%22">Ohta, Hitoshi</searchLink><br /><searchLink fieldCode="AR" term="%22Harima%2C+Hisatomo%22">Harima, Hisatomo</searchLink>
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  Data: Phys. Rev. B 100, 100501(R) (2019)
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– Name: Abstract
  Label: Description
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  Data: We report $^{75}$As-NMR results for CrAs under pressure, which shows superconductivity adjoining a helimagnetically ordered state. We successfully evaluated the Knight shift from the spectrum, which is strongly affected by the quadrupole interaction. The Knight shift shows the remarkable feature that the uniform spin susceptibility increases toward low temperatures in the paramagnetic state. This is in sharp contrast to CrAs at ambient pressure, and also to cuprates and Fe pnictides, where antiferromagnetic correlations are dominant. Superconductivity emerges in CrAs under unique magnetic correlations, which probably originate in the three-dimensional zigzag structure of its nonsymmorphic symmetry.<br />Comment: 5 pages, 4 figures
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  Data: 10.1103/PhysRevB.100.100501
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