Topological Magnetic Phase in the Candidate Weyl Semimetal CeAlGe

Pascal Puphal; Vladimir Pomjakushin; Naoya Kanazawa; Victor Ukleev; Dariusz J. Gawryluk; Junzhang Ma; Muntaser Naamneh; Nicholas C. Plumb; Lukas Keller; Robert Cubitt; Ekaterina Pomjakushina; Jonathan S. White

doi:https://doi.org/10.1103/PhysRevLett.124.017202

Topological Magnetic Phase in the Candidate Weyl Semimetal CeAlGe

Pascal Puphal, Vladimir Pomjakushin, Naoya Kanazawa, Victor Ukleev, Dariusz J. Gawryluk, Junzhang Ma, Muntaser Naamneh, Nicholas C. Plumb, Lukas Keller, Robert Cubitt, Ekaterina Pomjakushina, Jonathan S. White

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

Abstract

We report the discovery of topological magnetism in the candidate magnetic Weyl semimetal CeAlGe. Using neutron scattering we find this system to host several incommensurate, square-coordinated multi-k→ magnetic phases below TN. The topological properties of a phase stable at intermediate magnetic fields parallel to the c axis are suggested by observation of a topological Hall effect. Our findings highlight CeAlGe as an exceptional system for exploiting the interplay between the nontrivial topologies of the magnetization in real space and Weyl nodes in momentum space.

Original language	American English
Article number	017202
Journal	Physical Review Letters
Volume	124
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevLett.124.017202
State	Published - 7 Jan 2020
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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https://doi.org/10.1103/PhysRevLett.124.017202

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title = "Topological Magnetic Phase in the Candidate Weyl Semimetal CeAlGe",

abstract = "We report the discovery of topological magnetism in the candidate magnetic Weyl semimetal CeAlGe. Using neutron scattering we find this system to host several incommensurate, square-coordinated multi-k→ magnetic phases below TN. The topological properties of a phase stable at intermediate magnetic fields parallel to the c axis are suggested by observation of a topological Hall effect. Our findings highlight CeAlGe as an exceptional system for exploiting the interplay between the nontrivial topologies of the magnetization in real space and Weyl nodes in momentum space.",

author = "Pascal Puphal and Vladimir Pomjakushin and Naoya Kanazawa and Victor Ukleev and Gawryluk, {Dariusz J.} and Junzhang Ma and Muntaser Naamneh and Plumb, {Nicholas C.} and Lukas Keller and Robert Cubitt and Ekaterina Pomjakushina and White, {Jonathan S.}",

note = "Publisher Copyright: {\textcopyright} 2020 authors. Published by the American Physical Society.",

year = "2020",

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doi = "https://doi.org/10.1103/PhysRevLett.124.017202",

language = "American English",

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AU - Puphal, Pascal

AU - Pomjakushin, Vladimir

AU - Kanazawa, Naoya

AU - Ukleev, Victor

AU - Gawryluk, Dariusz J.

AU - Ma, Junzhang

AU - Naamneh, Muntaser

AU - Plumb, Nicholas C.

AU - Keller, Lukas

AU - Cubitt, Robert

AU - Pomjakushina, Ekaterina

AU - White, Jonathan S.

PY - 2020/1/7

Y1 - 2020/1/7

N2 - We report the discovery of topological magnetism in the candidate magnetic Weyl semimetal CeAlGe. Using neutron scattering we find this system to host several incommensurate, square-coordinated multi-k→ magnetic phases below TN. The topological properties of a phase stable at intermediate magnetic fields parallel to the c axis are suggested by observation of a topological Hall effect. Our findings highlight CeAlGe as an exceptional system for exploiting the interplay between the nontrivial topologies of the magnetization in real space and Weyl nodes in momentum space.

AB - We report the discovery of topological magnetism in the candidate magnetic Weyl semimetal CeAlGe. Using neutron scattering we find this system to host several incommensurate, square-coordinated multi-k→ magnetic phases below TN. The topological properties of a phase stable at intermediate magnetic fields parallel to the c axis are suggested by observation of a topological Hall effect. Our findings highlight CeAlGe as an exceptional system for exploiting the interplay between the nontrivial topologies of the magnetization in real space and Weyl nodes in momentum space.

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DO - https://doi.org/10.1103/PhysRevLett.124.017202

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SN - 0031-9007

VL - 124

JO - Physical Review Letters

JF - Physical Review Letters

IS - 1

M1 - 017202

ER -

Topological Magnetic Phase in the Candidate Weyl Semimetal CeAlGe

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