| Title: |
Epsilon iron as a spin-smectic state |
| Authors: |
Lebert, Blair; Gorni, Tommaso; Casula, Michele; Klotz, Stefan; Baudelet, François; Ablett, James, M; Hansen, Thomas, C; Juhin, Amélie; Polian, Alain; Munsch, Pascal; Le Marchand, Gilles; Zhang, Zailan; Rueff, Jean-Pascal; d'Astuto, Matteo |
| Contributors: |
Synchrotron SOLEIL (SSOLEIL); Centre National de la Recherche Scientifique (CNRS); Institut de minéralogie, de physique des matériaux et de cosmochimie (IMPMC); Muséum national d'Histoire naturelle (MNHN)-Institut de recherche pour le développement IRD : UR206-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS); Laboratoire de Physique et d'Etude des Matériaux (UMR 8213) (LPEM); Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris); Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS); Institut Laue-Langevin (ILL); Institut de Génétique et Développement de Rennes (IGDR); Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS)-Structure Fédérative de Recherche en Biologie et Santé de Rennes (Biosit : Biologie - Santé - Innovation Technologique); Laboratoire de Chimie Physique - Matière et Rayonnement (LCPMR); Institut de Chimie - CNRS Chimie (INC-CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS); Magnétisme et Supraconductivité (NEEL - MagSup); Institut Néel (NEEL); Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 )-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes 2016-2019 (UGA 2016-2019 ); ANR-11-IDEX-0004-02, Agence Nationale de la Recherche; ANR-11-IDEX-0004,SUPER,Sorbonne Universités à Paris pour l'Enseignement et la Recherche(2011) |
| Source: |
ISSN: 0027-8424. |
| Publisher Information: |
HAL CCSD; National Academy of Sciences |
| Publication Year: |
2019 |
| Collection: |
Université de Rennes 1: Publications scientifiques (HAL) |
| Subject Terms: |
high pressure; iron; magnetism; superconductivity; [PHYS.COND.CM-S]Physics [physics]/Condensed Matter [cond-mat]/Superconductivity [cond-mat.supr-con]; [PHYS.COND.CM-SCE]Physics [physics]/Condensed Matter [cond-mat]/Strongly Correlated Electrons [cond-mat.str-el] |
| Description: |
International audience ; Using X-ray emission spectroscopy, we find appreciable local magnetic moments until 30 GPa to 40 GPa in the high-pressure phase of iron; however, no magnetic order is detected with neutron powder diffraction down to 1.8 K, contrary to previous predictions. Our first-principles calculations reveal a “spin-smectic” state lower in energy than previous results. This state forms antiferromagnetic bilayers separated by null spin bilayers, which allows a complete relaxation of the inherent frustration of antiferromagnetism on a hexagonal close-packed lattice. The magnetic bilayers are likely orientationally disordered, owing to the soft interlayer excitations and the near-degeneracy with other smectic phases. This possible lack of long-range correlation agrees with the null results from neutron powder diffraction. An orientationally disordered, spin-smectic state resolves previously perceived contradictions in high-pressure iron and could be integral to explaining its puzzling superconductivity. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| Relation: |
info:eu-repo/semantics/altIdentifier/arxiv/1903.04792; info:eu-repo/semantics/altIdentifier/pmid/31548383; ARXIV: 1903.04792; PUBMED: 31548383; PUBMEDCENTRAL: PMC6789622 |
| DOI: |
10.1073/pnas.1904575116 |
| Availability: |
https://hal.science/hal-02295306; https://hal.science/hal-02295306v1/document; https://hal.science/hal-02295306v1/file/1903.04792v2.pdf; https://doi.org/10.1073/pnas.1904575116 |
| Rights: |
info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.AD034AEA |
| Database: |
BASE |