Frustration-induced diffusive scattering anomaly and dimension change in FeGe2

Yaokun Su; Hillary L. Smith; Matthew B. Stone; Douglas L. Abernathy; Mark D. Lumsden; Carl P. Adams; Chen Li

doi:10.1103/PhysRevB.106.024406

Frustration-induced diffusive scattering anomaly and dimension change in FeGe2

Yaokun Su, Hillary L. Smith, Matthew B. Stone, Douglas L. Abernathy, Mark D. Lumsden, Carl P. Adams, Chen Li

Research output: Contribution to journal › Article › peer-review

Abstract

Magnetic frustration, arising from the competition of exchange interactions, has received great attention because of its relevance to exotic quantum phenomena in materials. In the current work, we report an unusual checkerboard-shaped scattering anomaly in FeGe2, far from the known incommensurate magnetic satellite peaks, by inelastic neutron scattering. More surprisingly, such phenomenon appears as spin dynamics at low temperature, but it becomes prominent above Néel transition as elastic scattering. A model Hamiltonian that includes an intraplane next-nearest neighbor was proposed and such anomaly is attributed to the near-perfect magnetic frustration and the emergence of unexpected two-dimensional magnetic order in the quasi-one-dimensional FeGe2.

Original language	English
Article number	024406
Journal	Physical Review B
Volume	106
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevB.106.024406
State	Published - Jul 1 2022

Funding

This material is based upon work supported by the National Science Foundation under Grant No. 1750786. The neutron scattering portion of this research used resources at the Spallation Neutron Source and the High Flux Isotope Reactor, both of which are Department of Energy (DOE) Office of Science User Facilities operated by the Oak Ridge National Laboratory.

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10.1103/PhysRevB.106.024406

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title = "Frustration-induced diffusive scattering anomaly and dimension change in FeGe2",

abstract = "Magnetic frustration, arising from the competition of exchange interactions, has received great attention because of its relevance to exotic quantum phenomena in materials. In the current work, we report an unusual checkerboard-shaped scattering anomaly in FeGe2, far from the known incommensurate magnetic satellite peaks, by inelastic neutron scattering. More surprisingly, such phenomenon appears as spin dynamics at low temperature, but it becomes prominent above N{\'e}el transition as elastic scattering. A model Hamiltonian that includes an intraplane next-nearest neighbor was proposed and such anomaly is attributed to the near-perfect magnetic frustration and the emergence of unexpected two-dimensional magnetic order in the quasi-one-dimensional FeGe2.",

author = "Yaokun Su and Smith, {Hillary L.} and Stone, {Matthew B.} and Abernathy, {Douglas L.} and Lumsden, {Mark D.} and Adams, {Carl P.} and Chen Li",

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AU - Smith, Hillary L.

AU - Stone, Matthew B.

AU - Abernathy, Douglas L.

AU - Lumsden, Mark D.

AU - Adams, Carl P.

AU - Li, Chen

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N2 - Magnetic frustration, arising from the competition of exchange interactions, has received great attention because of its relevance to exotic quantum phenomena in materials. In the current work, we report an unusual checkerboard-shaped scattering anomaly in FeGe2, far from the known incommensurate magnetic satellite peaks, by inelastic neutron scattering. More surprisingly, such phenomenon appears as spin dynamics at low temperature, but it becomes prominent above Néel transition as elastic scattering. A model Hamiltonian that includes an intraplane next-nearest neighbor was proposed and such anomaly is attributed to the near-perfect magnetic frustration and the emergence of unexpected two-dimensional magnetic order in the quasi-one-dimensional FeGe2.

AB - Magnetic frustration, arising from the competition of exchange interactions, has received great attention because of its relevance to exotic quantum phenomena in materials. In the current work, we report an unusual checkerboard-shaped scattering anomaly in FeGe2, far from the known incommensurate magnetic satellite peaks, by inelastic neutron scattering. More surprisingly, such phenomenon appears as spin dynamics at low temperature, but it becomes prominent above Néel transition as elastic scattering. A model Hamiltonian that includes an intraplane next-nearest neighbor was proposed and such anomaly is attributed to the near-perfect magnetic frustration and the emergence of unexpected two-dimensional magnetic order in the quasi-one-dimensional FeGe2.

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Frustration-induced diffusive scattering anomaly and dimension change in FeGe2

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