Pressure-induced volume-collapsed tetragonal phase of CaFe 2As2 as seen via neutron scattering

A. Kreyssig; M. A. Green; Y. Lee; G. D. Samolyuk; P. Zajdel; J. W. Lynn; S. L. Bud'ko; M. S. Torikachvili; N. Ni; S. Nandi; J. B. Leão; S. J. Poulton; D. N. Argyriou; B. N. Harmon; R. J. McQueeney; P. C. Canfield; A. I. Goldman

doi:10.1103/PhysRevB.78.184517

Pressure-induced volume-collapsed tetragonal phase of CaFe ₂As₂ as seen via neutron scattering

A. Kreyssig, M. A. Green, Y. Lee, G. D. Samolyuk, P. Zajdel, J. W. Lynn, S. L. Bud'ko, M. S. Torikachvili, N. Ni, S. Nandi, J. B. Leão, S. J. Poulton, D. N. Argyriou, B. N. Harmon, R. J. McQueeney, P. C. Canfield, A. I. Goldman

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Abstract

Recent investigations of the superconducting iron-arsenide families have highlighted the role of pressure, be it chemical or mechanical, in fostering superconductivity. Here we report that CaFe₂As₂ undergoes a pressure-induced transition to a nonmagnetic volume "collapsed" tetragonal phase, which becomes superconducting at lower temperature. Spin-polarized total-energy calculations on the collapsed structure reveal that the magnetic Fe moment itself collapses, consistent with the absence of magnetic order in neutron diffraction.

Original language	English
Article number	184517
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	78
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevB.78.184517
State	Published - Nov 24 2008

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Kreyssig, A., Green, M. A., Lee, Y., Samolyuk, G. D., Zajdel, P., Lynn, J. W., Bud'ko, S. L., Torikachvili, M. S., Ni, N., Nandi, S., Leão, J. B., Poulton, S. J., Argyriou, D. N., Harmon, B. N., McQueeney, R. J., Canfield, P. C., & Goldman, A. I. (2008). Pressure-induced volume-collapsed tetragonal phase of CaFe ₂As₂ as seen via neutron scattering. Physical Review B - Condensed Matter and Materials Physics, 78(18), Article 184517. https://doi.org/10.1103/PhysRevB.78.184517

@article{d3f3adbbcc724becb5242b41af3ee899,

title = "Pressure-induced volume-collapsed tetragonal phase of CaFe 2As2 as seen via neutron scattering",

abstract = "Recent investigations of the superconducting iron-arsenide families have highlighted the role of pressure, be it chemical or mechanical, in fostering superconductivity. Here we report that CaFe2As2 undergoes a pressure-induced transition to a nonmagnetic volume {"}collapsed{"} tetragonal phase, which becomes superconducting at lower temperature. Spin-polarized total-energy calculations on the collapsed structure reveal that the magnetic Fe moment itself collapses, consistent with the absence of magnetic order in neutron diffraction.",

author = "A. Kreyssig and Green, \{M. A.\} and Y. Lee and Samolyuk, \{G. D.\} and P. Zajdel and Lynn, \{J. W.\} and Bud'ko, \{S. L.\} and Torikachvili, \{M. S.\} and N. Ni and S. Nandi and Le{\~a}o, \{J. B.\} and Poulton, \{S. J.\} and Argyriou, \{D. N.\} and Harmon, \{B. N.\} and McQueeney, \{R. J.\} and Canfield, \{P. C.\} and Goldman, \{A. I.\}",

year = "2008",

month = nov,

day = "24",

doi = "10.1103/PhysRevB.78.184517",

language = "English",

volume = "78",

journal = "Physical Review B - Condensed Matter and Materials Physics",

issn = "1098-0121",

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Kreyssig, A, Green, MA, Lee, Y, Samolyuk, GD, Zajdel, P, Lynn, JW, Bud'ko, SL, Torikachvili, MS, Ni, N, Nandi, S, Leão, JB, Poulton, SJ, Argyriou, DN, Harmon, BN, McQueeney, RJ, Canfield, PC & Goldman, AI 2008, 'Pressure-induced volume-collapsed tetragonal phase of CaFe ₂As₂ as seen via neutron scattering', Physical Review B - Condensed Matter and Materials Physics, vol. 78, no. 18, 184517. https://doi.org/10.1103/PhysRevB.78.184517

TY - JOUR

T1 - Pressure-induced volume-collapsed tetragonal phase of CaFe 2As2 as seen via neutron scattering

AU - Kreyssig, A.

AU - Green, M. A.

AU - Lee, Y.

AU - Samolyuk, G. D.

AU - Zajdel, P.

AU - Lynn, J. W.

AU - Bud'ko, S. L.

AU - Torikachvili, M. S.

AU - Ni, N.

AU - Nandi, S.

AU - Leão, J. B.

AU - Poulton, S. J.

AU - Argyriou, D. N.

AU - Harmon, B. N.

AU - McQueeney, R. J.

AU - Canfield, P. C.

AU - Goldman, A. I.

PY - 2008/11/24

Y1 - 2008/11/24

N2 - Recent investigations of the superconducting iron-arsenide families have highlighted the role of pressure, be it chemical or mechanical, in fostering superconductivity. Here we report that CaFe2As2 undergoes a pressure-induced transition to a nonmagnetic volume "collapsed" tetragonal phase, which becomes superconducting at lower temperature. Spin-polarized total-energy calculations on the collapsed structure reveal that the magnetic Fe moment itself collapses, consistent with the absence of magnetic order in neutron diffraction.

AB - Recent investigations of the superconducting iron-arsenide families have highlighted the role of pressure, be it chemical or mechanical, in fostering superconductivity. Here we report that CaFe2As2 undergoes a pressure-induced transition to a nonmagnetic volume "collapsed" tetragonal phase, which becomes superconducting at lower temperature. Spin-polarized total-energy calculations on the collapsed structure reveal that the magnetic Fe moment itself collapses, consistent with the absence of magnetic order in neutron diffraction.

UR - https://www.scopus.com/pages/publications/57249108449

U2 - 10.1103/PhysRevB.78.184517

DO - 10.1103/PhysRevB.78.184517

M3 - Article

AN - SCOPUS:57249108449

SN - 1098-0121

VL - 78

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 18

M1 - 184517

ER -

Pressure-induced volume-collapsed tetragonal phase of CaFe ₂As₂ as seen via neutron scattering

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