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Title: Weyl magnons in breathing pyrochlore antiferromagnets

Journal Article · · Nature Communications
DOI:https://doi.org/10.1038/ncomms12691· OSTI ID:1361676
 [1]; ORCiD logo [2];  [3];  [4];  [5];  [5]
  1. Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Theoretical Physics
  2. Fudan Univ., Shanghai (China). School of Computer Science
  3. Univ. of Toronto, ON (Canada). Canadian Inst. for Advanced Research, Dept. of Physics
  4. Univ. of California, Santa Barbara, CA (United States). Kavli Inst. for Theoretical Physics
  5. Fudan Univ., Shanghai (China). State Key Lab. of Surface Physics and Dept. of Physics; Fudan Univ., Shanghai (China). Center for Field Theory and Particle Physics, Dept. of Physics; Collaborative Innovation Center of Advanced Microstructures, Nanjing (China)

Frustrated quantum magnets not only provide exotic ground states and unusual magnetic structures, but also support unconventional excitations in many cases. Using a physically relevant spin model for a breathing pyrochlore lattice, we discuss the presence of topological linear band crossings of magnons in antiferromagnets. These are the analogues of Weyl fermions in electronic systems, which we dub Weyl magnons. The bulk Weyl magnon implies the presence of chiral magnon surface states forming arcs at finite energy. We argue that such antiferromagnets present a unique example, in which Weyl points can be manipulated in situ in the laboratory by applied fields. We discuss their appearance specifically in the breathing pyrochlore lattice, and give some general discussion of conditions to find Weyl magnons, and how they may be probed experimentally. Our work may inspire a re-examination of the magnetic excitations in many magnetically ordered systems.

Research Organization:
Univ. of California, Santa Barbara, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
FG02-08ER46524
OSTI ID:
1361676
Journal Information:
Nature Communications, Vol. 7; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 141 works
Citation information provided by
Web of Science

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Cited By (65)

Topological one-way fiber of second Chern number journal December 2018
Breathing chromium spinels: a showcase for a variety of pyrochlore Heisenberg Hamiltonians journal December 2019
Topological spin excitations in a three-dimensional antiferromagnet journal July 2018
Floquet Weyl Magnons in Three-Dimensional Quantum Magnets journal July 2018
Spin currents and magnon dynamics in insulating magnets journal February 2017
Flat bands and Dirac cones in breathing lattices journal June 2017
Electronic scattering, focusing, and resonance by a spherical barrier in Weyl semimetals journal May 2018
Two-dimensional Dirac nodal loop magnons in collinear antiferromagnets journal June 2018
Behavior of the breathing pyrochlore lattice Ba 3 Yb 2 Zn 5 O 11 in applied magnetic field journal October 2018
Interacting topological insulators: a review journal October 2018
Magnonic analogs of topological Dirac semimetals journal September 2017
Z 2 topological quantum paramagnet on a honeycomb bilayer journal July 2019
Magnon topology and thermal Hall effect in trimerized triangular lattice antiferromagnet journal August 2019
Non-Hermitian topology of spontaneous magnon decay journal September 2019
High-field expansion approach to kagome antiferromagnets with Dzyaloshinskii-Moriya interactions journal September 2019
Magnon blockade in a hybrid ferromagnet-superconductor quantum system journal October 2019
Three-dimensional topological magnon systems journal October 2019
Magnonic analog of the Edelstein effect in antiferromagnetic insulators journal January 2020
Topological thermal Hall effect in frustrated kagome antiferromagnets journal January 2017
Kitaev materials beyond iridates: Order by quantum disorder and Weyl magnons in rare-earth double perovskites journal February 2017
Magnonic quantum Hall effect and Wiedemann-Franz law journal March 2017
Magnonic Weyl semimetal and chiral anomaly in pyrochlore ferromagnets journal June 2017
Universal phase transition and band structures for spinless nodal-line and Weyl semimetals journal September 2017
Magnonic topological insulators in antiferromagnets journal December 2017
Weyl magnons in noncoplanar stacked kagome antiferromagnets journal March 2018
Weyl magnons in pyrochlore antiferromagnets with an all-in-all-out order journal March 2018
Negative thermal expansion and magnetoelastic coupling in the breathing pyrochlore lattice material LiGaCr 4 S 8 journal April 2018
Topological magnons in a one-dimensional itinerant flatband ferromagnet journal June 2018
Topological excitations in the ferromagnetic Kitaev-Heisenberg model journal August 2018
Magnon thermal Hall effect in kagome antiferromagnets with Dzyaloshinskii-Moriya interactions journal September 2018
Z 2 topological invariant for magnon spin Hall systems journal January 2019
Thermal Hall effect and topological edge states in a square-lattice antiferromagnet journal February 2019
Imbert-Fedorov shift in pseudospin N / 2 semimetals and nodal-line semimetals journal April 2019
Topological magnon bands for magnonics journal May 2019
Tunable Magnon Weyl Points in Ferromagnetic Pyrochlores journal October 2016
Magnon Spin-Momentum Locking: Various Spin Vortices and Dirac magnons in Noncollinear Antiferromagnets journal September 2017
Higher-Order Topological Insulators and Semimetals on the Breathing Kagome and Pyrochlore Lattices journal January 2018
Nonsymmorphic-Symmetry-Protected Topological Magnons in Three-Dimensional Kitaev Materials journal November 2019
Topological Magnetic Phase in the Candidate Weyl Semimetal CeAlGe journal January 2020
Magnonic Weyl states in Cu 2 OSeO 3 journal January 2020
Intrinsic spin Nernst effect of magnons in a noncollinear antiferromagnet journal January 2020
Diagnosis for Nonmagnetic Topological Semimetals in the Absence of Spin-Orbital Coupling journal September 2018
Topological Spin Excitations in Honeycomb Ferromagnet CrI 3 journal November 2018
Weyl and Dirac semimetals in three-dimensional solids journal January 2018
Breathing chromium spinels: a showcase for a variety of pyrochlore Heisenberg Hamiltonians text January 2019
Magnonic topological insulators in antiferromagnets text January 2017
Magnonic quantum Hall effect and Wiedemann-Franz law text January 2017
Kitaev materials beyond iridates: order by quantum disorder and Weyl magnons in rare-earth double perovskites text January 2016
Flat bands and Dirac cones in breathing lattices text January 2016
Magnonic Analogs of Topological Dirac Semimetals text January 2016
Magnonic quantum Hall effect and Wiedemann-Franz law text January 2016
Dirac and nodal line magnons in three-dimensional antiferromagnets text January 2017
Weyl and Dirac Semimetals in Three Dimensional Solids text January 2017
Electronic scattering, focusing, and resonance by a spherical barrier in Weyl semimetals text January 2018
Topological excitations in the ferromagnetic Kitaev-Heisenberg model text January 2018
Two-dimensional Dirac nodal loop magnons in collinear antiferromagnets text January 2018
Interacting topological insulators: a review text January 2018
Behavior of the breathing pyrochlore lattice Ba$_3$Yb$_2$Zn$_5$O$_{11}$ in applied magnetic field text January 2018
Non-Hermitian topology of spontaneous magnon decay text January 2019
Three-dimensional topological magnon systems text January 2019
High-Field Expansion Approach to Kagome Antiferromagnets with Dzyaloshinskii-Moriya Interactions text January 2019
Magnonic Analogue of Edelstein Effect in Antiferromagnetic Insulators text January 2019
Magnon Blockade in a Hybrid Ferromagnet-Superconductor Quantum System text January 2019
Dirac Magnon Nodal Loops in Quasi-2D Quantum Magnets text January 2017
Discovery of coexisting Dirac and triply degenerate magnons in a three-dimensional antiferromagnet text January 2017