Lattice collapse and quenching of magnetism in CaFe2As2 under pressure: A single crystal neutron and x-ray diffraction investigation

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dc.creatorGoldman, A. I.
dc.creatorKreyssig, A.
dc.creatorProkes, K.
dc.creatorPratt, D. K.
dc.creatorArgyriou, D. N.
dc.creatorLynn, J. W.
dc.creatorNandi, S.
dc.creatorKimber, S. A. J.
dc.creatorChen, Y.
dc.creatorLee, Y. B.
dc.creatorSamolyuk, G.
dc.creatorLeao, J. B.
dc.creatorPoulton, S. J.
dc.creatorBud'ko, S. L.
dc.creatorNi, N.
dc.creatorCanfield, P. C.
dc.creatorHarmon, B. N.
dc.creatorMcQueeney, R. J.
dc.date2008-11-13
dc.date2008-11-19
dc.date.accessioned2026-07-07T12:32:26Z
dc.date.available2026-07-07T12:32:26Z
dc.descriptionSingle crystal neutron and high-energy x-ray diffraction have identified the phase lines corresponding to transitions between the ambient-pressure tetragonal (T), the antiferromagnetic orthorhombic (O) and the non-magnetic collapsed tetragonal (cT) phases of CaFe2As2. We find no evidence of additional structures for pressures up to 2.5 GPa (at 300 K). Both the T-cT and O-cT transitions exhibit significant hysteresis effects and we demonstrate that coexistence of the O and cT phases can occur if a non-hydrostatic component of pressure is present. Measurements of the magnetic diffraction peaks show no change in the magnetic structure or ordered moment as a function of pressure in the O phase and we find no evidence of magnetic ordering in the cT phase. Band structure calculations show that the transition results in a strong decrease of the iron 3d density of states at the Fermi energy, consistent with a loss of the magnetic moment.
dc.descriptionList of authors in metadata and typos in labeling of inset in Fig. 1(a) corrected. One ref. added. No other changes
dc.identifierhttps://arxiv.org/abs/0811.2013
dc.identifierhttp://arxiv.org/abs/0811.2013
dc.identifierPhys. Rev. B 79, 024513 (2009)
dc.identifierdoi:10.1103/PhysRevB.79.024513
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/216779
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleLattice collapse and quenching of magnetism in CaFe2As2 under pressure: A single crystal neutron and x-ray diffraction investigation
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