Ferrimagnetic Regulation of Weyl Fermions in a Noncentrosymmetric Magnetic Weyl Semimetal

Abstract

The study of interaction between electromagnetism and elementary particles is a long-standing topic in physics. Likewise, the connection between particle physics and emergent phenomena in condensed matter physics is a recurring theme and condensed matter physics has often provided a platform for investigating the interplay between particles and fields in cases that have not been observed in high-energy physics, so far. Here, using angle-resolved photoemission spectroscopy, we provide a new example of this by visualizing the electronic structure of a noncentrosymmetric magnetic Weyl semimetal candidate NdAlSi in both the paramagnetic and ferrimagnetic states. We observe surface Fermi arcs and bulk Weyl fermion dispersion as well as the regulation of Weyl fermions by ferrimagnetism. Our results establish NdAlSi as a magnetic Weyl semimetal and provide the first experimental observation of ferrimagnetic regulation of Weyl fermions in condensed matter.

19 pages, 4 figures

References in corpus (21)

• Dissipationless Quantum Spin Current at Room Temperature
• Topological Semimetals
• Weyl Semimetals, Fermi Arcs and Chiral Anomalies (A Short Review)
• Spin fluctuation induced Weyl semimetal state in the paramagnetic phase of EuCd${}_2$As${}_2$
• Topological Magnetic Phase in the Candidate Weyl Semimetal CeAlGe
• Magnetism and anomalous transport in the Weyl semimetal PrAlGe: Possible route to axial gauge fields
• Observation of Weyl fermions in a magnetic non-centrosymmetric crystal
• Transition from Intrinsic to Extrinsic Anomalous Hall Effect in the Ferromagnetic Weyl Semimetal PrAlGe${}_{1-x}$Si${}_x$
• Topological spiral magnetism in the Weyl semimetal SmAlSi
• Sign change of the anomalous Hall effect and the anomalous Nernst effect in Weyl semimetal CeAlSi
• Multiple Weyl fermions in the noncentrosymmetric semimetal LaAlSi
• Mapping Domain Wall Topology in the Magnetic Weyl Semimetal CeAlSi
• Field-Induced Lifshitz Transition in the Magnetic Weyl Semimetal Candidate PrAlSi
• Kramers nodal lines and Weyl fermions in SmAlSi
• Quantum oscillations in Noncentrosymmetric Weyl semimetals RAlSi (R = Sm and Ce)
• Signature of weakly coupled $f$ electrons and conduction electrons in magnetic Weyl semimetal candidates PrAlSi and SmAlSi
• Shubnikov-de Haas Oscillations and Nontrivial Topological State in a New Weyl Semimetal Candidate SmAlSi
• Giant and Reversible Electronic Structure Evolution in a Magnetic Topological Material EuCd2As2
• Spin-lattice relaxation phenomena in the magnetic state of a suggested Weyl semimetal CeAlGe
• New Type of Quantum Oscillations Stemmed From the Strong Weyl Fermions - 4f Electrons Exchange Interaction
• Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction in Weyl semimetals with tilted energy dispersion

Cited by in corpus (17)

• Topological Weyl Altermagnetism in CrSb
• GdAlSi: An antiferromagnetic topological Weyl semimetal with non-relativistic spin splitting
• Anomalous Hall effect with plateaus observed in a magnetic Weyl semimetal NdAlGe at low temperatures
• The type-I antiferromagnetic Weyl semimetal InMnTi${}_2$
• Abnormally enhanced Hall Lorenz number in the magnetic Weyl semimetal NdAlSi
• Intrinsic Orbital Origin for the Chirality-Dependent Nonlinear Planar Hall Effect of Topological Nodal Fermions in Chiral Crystals
• Chiral phononic and electronic edge modes of EuPtSi
• Non-Hermitian Boundary in a Surface Selective Reconstructed Magnetic Weyl Semimetal
• Spin order and dynamics in the topological rare-earth germanide semimetals
• Structural characterization of the candidate Weyl semimetal CeGaGe
• Disorder Driven Non-Anderson Transition in a Weyl Semimetal
• Significant Chiral Magnetotransport Magnified by Multiple Weyl Nodes
• Zone-selection effect of photoelectron intensity distributions in a nonsymmorphic system RAlSi (R : Ce and Nd)
• Crystalline electric field excitations in Weyl semimetal \textit{R}AlSi (\textit{R} = Ce, Pr and Nd)
• Isotropic Dirac fermion and anomalous oscillator strength of zeroth Landau level transition
• Incommensurate magnetic order drives singular angular magnetoresistance in a Weyl semimetal
• Exact solutions for topological surface states of three-dimensional lattice models