Single pair of Weyl nodes in the spin-canted structure of 
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Taddei, Keith M.; Yin, Liuguo; Sanjeewa, Liurukara D.; Li, Y.; Xing, Jie; Phelan, Daniel; Sefat, Athena S.; Parker, David

doi:10.1103/physrevb.105.l140401

Cited by 20 publications

(9 citation statements)

References 48 publications

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“…have performed the detailed neutron diffraction study on FM‐EuCd 2 As 2 (magnetic space group C 2′/ m ′) and confirmed the Eu moments pointing along the [210] direction in plane and canted ≈30° out of plane. [ 29 ] Interestingly, we have observed topological Hall signal in our resistivity measurement which was not observed in the previous study. [ 28 ]…”

Section: Resultscontrasting

confidence: 75%

“…Recently Taddei et al have performed the detailed neutron diffraction study on FM-EuCd 2 As 2 (magnetic space group C2′/m′) and confirmed the Eu moments pointing along the [210] direction in plane and canted ≈30°out of plane. [29] Interestingly, we have observed topological Hall signal in our resistivity measurement which was not observed in the previous study. [28] The THE can have different types of origins: I) one possibility is that THE is due to the topology of the material's magnetization texture, which is related to its real space picture; and II) another possibility is the THE is caused by a reciprocal band structure involving Weyl nodes, known as momentum space picture.…”

Section: Resultscontrasting

confidence: 67%

“…Recently, Parker and co‐workers have shown the influence of spin canting on the electronic structure and Weyl physics via Neutron scattering and DFT calculations. [ 29 ] Now, we have also calculated the electronic structure of FM‐EuCd 2 As 2 by considering several canting angles (Figure 2a–d, and Figure S9, Supporting Information). From DFT calculations, we observed that band structure is extremely sensitive to canting angle, influencing the Weyl physics even at very small canting angles.…”

Section: Resultsmentioning

confidence: 99%

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Anomalous Hall Conductivity and Nernst Effect of the Ideal Weyl Semimetallic Ferromagnet EuCd₂As₂

et al. 2023

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Weyl semimetal is a unique topological phase with topologically protected band crossings in the bulk and robust surface states called Fermi arcs. Weyl nodes always appear in pairs with opposite chiralities, and they need to have either time‐reversal or inversion symmetry broken. When the time‐reversal symmetry is broken the minimum number of Weyl points (WPs) is two. If these WPs are located at the Fermi level, they form an ideal Weyl semimetal (WSM). In this study, intrinsic ferromagnetic (FM) EuCd2As2 are grown, predicted to be an ideal WSM and studied its electronic structure by angle‐resolved photoemission spectroscopy, and scanning tunneling microscopy which agrees closely with the first principles calculations. Moreover, anomalous Hall conductivity and Nernst effect are observed, resulting from the non‐zero Berry curvature, and the topological Hall effect arising from changes in the band structure caused by spin canting produced by magnetic fields. These findings can help realize several exotic quantum phenomena in inorganic topological materials that are otherwise difficult to assess because of the presence of multiple pairs of Weyl nodes.

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Section: Resultscontrasting

confidence: 75%

Section: Resultscontrasting

confidence: 67%

Section: Resultsmentioning

confidence: 99%

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Anomalous Hall Conductivity and Nernst Effect of the Ideal Weyl Semimetallic Ferromagnet EuCd₂As₂

et al. 2023

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“…EuCd 2 As 2 is chosen for the proposed physics due to the presence of strong exchange interaction 59 and magnetic Weyl semimetal phase [60][61][62][63][64] . Single crystal EuCd 2 As 2 (a trigonal structure with space group of P 3m1) is synthesized by using the standard flux method (more details in the "Methods" section).…”

Section: Materials Realizationmentioning

confidence: 99%

The discovery of three-dimensional Van Hove singularity

Wu,

Shi,

Ozerov

et al. 2024

Nat Commun

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Arising from the extreme/saddle point in electronic bands, Van Hove singularity (VHS) manifests divergent density of states (DOS) and induces various new states of matter such as unconventional superconductivity. VHS is believed to exist in one and two dimensions, but rarely found in three dimension (3D). Here, we report the discovery of 3D VHS in a topological magnet EuCd2As2 by magneto-infrared spectroscopy. External magnetic fields effectively control the exchange interaction in EuCd2As2, and shift 3D Weyl bands continuously, leading to the modification of Fermi velocity and energy dispersion. Above the critical field, the 3D VHS forms and is evidenced by the abrupt emergence of inter-band transitions, which can be quantitatively described by the minimal model of Weyl semimetals. Three additional optical transitions are further predicted theoretically and verified in magneto-near-infrared spectra. Our results pave the way to exploring VHS in 3D systems and uncovering the coordination between electronic correlation and the topological phase.

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“…);Sanjeewa et al (2020);Taddei et al (2022) probing even this narrow width of formation is necessary and revealing.…”

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confidence: 99%

Synthesis and characterization of single crystals of rare-earth containing magnetic topological semimetal candidates

Kuthanazhi

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Single pair of Weyl nodes in the spin-canted structure of EuCd2As2

Cited by 20 publications

References 48 publications

Anomalous Hall Conductivity and Nernst Effect of the Ideal Weyl Semimetallic Ferromagnet EuCd₂As₂

Anomalous Hall Conductivity and Nernst Effect of the Ideal Weyl Semimetallic Ferromagnet EuCd₂As₂

The discovery of three-dimensional Van Hove singularity

Synthesis and characterization of single crystals of rare-earth containing magnetic topological semimetal candidates

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Single pair of Weyl nodes in the spin-canted structure of EuCd2As2

Cited by 20 publications

References 48 publications

Anomalous Hall Conductivity and Nernst Effect of the Ideal Weyl Semimetallic Ferromagnet EuCd2As2

Anomalous Hall Conductivity and Nernst Effect of the Ideal Weyl Semimetallic Ferromagnet EuCd2As2

The discovery of three-dimensional Van Hove singularity

Synthesis and characterization of single crystals of rare-earth containing magnetic topological semimetal candidates

Contact Info

Product

Resources

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Anomalous Hall Conductivity and Nernst Effect of the Ideal Weyl Semimetallic Ferromagnet EuCd₂As₂

Anomalous Hall Conductivity and Nernst Effect of the Ideal Weyl Semimetallic Ferromagnet EuCd₂As₂