Triiron ditin intermetallic
Identifiers
InChI=1S/3Fe.2Sn
Key: CQCUKVSIWYDQMI-UHFFFAOYSA-N
Properties
Fe3 Sn·Sn
Structure[1]
Kagome
R3 m
a = 5.338
Å ,
c = 19.789
Å hexagonal
Related compounds
Related compounds
Fe3 Sn
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
Chemical compound
The compound with empirical formula Fe3 Sn2 is the first known kagome magnet . It is an intermetallic compound composed of iron (Fe) and tin (Sn) , with alternating planes of Fe3 Sn and Sn.[1]
Preparation
The iron-tin intermetallic forms at around 750 °C (1,380 °F) and naturally assumes a kagome structure.[2] Quenching in an ice bath then cools the material to room temperature without disrupting the atomic structure.[3]
Electronic structure
The compound's band structure exhibits a double Dirac cone , enabling Dirac fermions . A 30 meV gap separates the cones, which indicates the quantum Hall effect and massive Dirac fermions.[4] Close measurement of the Fermi surface via the de Haas-van Alphen effect suggests that the massive fermions also exhibit Kane-Mele-type spin-orbit coupling .[5]
Fe3 Sn2 can also host magnetic skyrmions , but these typically require high magnetic fields to nucleate . For samples with a small (but nonzero) thickness gradient, only a small-amplitude (5-10 mT), direction-variant magnetic field suffices to nucleate the quasiparticles .[6]
References
^ a b Ye, Linda; Kang Mingu; Liu Junwei; von Cube, Felix; Wicker, Christina R.; Suzuki Takehito; Jozwiak, Chris; Bostwick, Aaron; Rotenberg, Eli; Bell, David C.; Fu Liang (19 March 2018). "Massive Dirac fermions in a ferromagnetic kagome metal" . Nature . 555 (7698): 638–642. arXiv :1709.10007 . Bibcode :2018Natur.555..638Y . doi :10.1038/nature25987 . ISSN 1476-4687 . PMID 29555992 . S2CID 4470420 .
^ Aristos Georgiou (March 20, 2018). "Kagome metal: new exotic quantum material developed by scientists" . Newsweek .
^ Chu, Jennifer (March 19, 2018). "Physicists discover new quantum electronic material" . MIT News . Massachusetts Institute of Technology.
^ "The Electronic Structure of a 'Kagome' Material" . ALS . Lawrence Berkeley National Lab . 2018-06-15. Retrieved 2020-04-17 .
^ Ye, Linda; Chan Mun K.; McDonald, Ross D.; Graf, David; Kang Mingu; Liu Junwei; Suzuki Takehito; Comin, Riccardo; Fu Liang; Checkelsky, Joseph G. (2019-10-25). "De Haas-van Alphen effect of correlated Dirac states in kagome metal Fe3 Sn2 " . Nature Communications . 10 (1): 4870. arXiv :1809.11159 . Bibcode :2019NatCo..10.4870Y . doi :10.1038/s41467-019-12822-1 . ISSN 2041-1723 . PMC 6814717 . PMID 31653866 .
^ Wang Binbin; Wu Po-kuan; Bagués Salguero, Núria; Zheng Qiang; Yan Jiaqiang; Randeria, Mohit; McComb, David W. (2021-08-24). "Stimulated Nucleation of Skyrmions in a Centrosymmetric Magnet". ACS Nano . 15 (8): 13495–13503. doi :10.1021/acsnano.1c04053 . ISSN 1936-0851 . OSTI 1819517 . PMID 34374281 . S2CID 236967261 .