Pressure-induced volume-collapsed tetragonal phase of CaFe₂As₂ as seen via neutron scattering

A. Kreyssig^1,2,*, M. A. Green^3,4, Y. Lee^1,2, G. D. Samolyuk^1,2, P. Zajdel^3,5, J. W. Lynn³, S. L. Bud’ko^1,2, M. S. Torikachvili⁶, N. Ni^1,2, S. Nandi^1,2, J. B. Leão³, S. J. Poulton^3,4, D. N. Argyriou⁷, B. N. Harmon^1,2, R. J. McQueeney^1,2, P. C. Canfield^1,2, and A. I. Goldman^1,2
1Ames Laboratory, US DOE, Ames, Iowa 50011, USA
²Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA
³NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
⁴Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742, USA
⁵Department of Chemistry, University College of London, 20 Gordon Street, London W1X 0AJ, United Kingdom
⁶Department of Physics, San Diego State University, San Diego, California 92182, USA
⁷Helmholtz-Zentrum Berlin für Materialien und Energie, Glienicker Str. 100, 14109 Berlin, Germany

^*kreyssig@ameslab.gov