Antichiral spin order, its soft modes, and their hybridization with phonons in the topological semimetal 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mrow><mml:mi>Mn</mml:mi></mml:mrow><mml:mn>3</mml:mn></mml:msub><mml:mi>Ge</mml:mi></mml:math>

Chen, Y.; Gaudet, Jonathan; Dasgupta, Sayak; Marcus, Guy; Lin, Jiao; Chen, T.; Tomita, Takahiro; Ikhlas, Muhammad; Zhao, Yang; Chen, W. C.; Stone, M. B.; Tchernyshyov, Oleg; Nakatsuji, Satoru; Broholm, C.

doi:10.1103/physrevb.102.054403

Cited by 42 publications

(60 citation statements)

References 68 publications

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“…Note added. Recently, we became aware of a conventional polarized neutron diffraction study of Mn 3 Ge which found the same magnetic structure as presented here [42].…”

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confidence: 64%

Ground-state magnetic structure of Mn3Ge

et al. 2020

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We have used spherical neutron polarimetry to investigate the magnetic structure of the Mn spins in the hexagonal semimetal Mn 3 Ge, which exhibits a large intrinsic anomalous Hall effect. Our analysis of the polarimetric data finds a strong preference for a spin structure with E 1g symmetry relative to the D 6h point group. We show that weak ferromagnetism is an inevitable consequence of the symmetry of the observed magnetic structure, and that sixth-order anisotropy is needed to select a unique ground state.

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“…Note added. Recently, we became aware of a conventional polarized neutron diffraction study of Mn 3 Ge which found the same magnetic structure as presented here [42].…”

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confidence: 64%

Ground-state magnetic structure of Mn3Ge

et al. 2020

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“…The second-order nature of the magnetic transition suggests that the spin structure of Mn 3 X ( X = Sn, Ge) belongs to the D 6h point group, which allows four distinct 120° spin structures with q = 0 . Recent polarized neutron diffraction studies on single crystals constrain the ground-state spin structure to E 1g symmetry type, for which the weak ferromagnetism is inevitable 37 , 38 . This information is essential for verifying the theoretical proposals of Weyl nodes based on band structure calculations 8 , 28 , 39 , 40 .…”

Section: Basic Properties Of Mn 3 X ( mentioning

confidence: 99%

Anomalous transport due to Weyl fermions in the chiral antiferromagnets Mn3X, X = Sn, Ge

et al. 2021

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The recent discoveries of strikingly large zero-field Hall and Nernst effects in antiferromagnets Mn3X (X = Sn, Ge) have brought the study of magnetic topological states to the forefront of condensed matter research and technological innovation. These effects are considered fingerprints of Weyl nodes residing near the Fermi energy, promoting Mn3X (X = Sn, Ge) as a fascinating platform to explore the elusive magnetic Weyl fermions. In this review, we provide recent updates on the insights drawn from experimental and theoretical studies of Mn3X (X = Sn, Ge) by combining previous reports with our new, comprehensive set of transport measurements of high-quality Mn3Sn and Mn3Ge single crystals. In particular, we report magnetotransport signatures specific to chiral anomalies in Mn3Ge and planar Hall effect in Mn3Sn, which have not yet been found in earlier studies. The results summarized here indicate the essential role of magnetic Weyl fermions in producing the large transverse responses in the absence of magnetization.

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“…4), we observe almost an uniform intensity throughout the whole measured energy range thus not requiring an energy-dependent broadening in the calculated spin-wave spectra. Returning to the model results, the acoustic spin-wave modes are centered around the AFM zone centers and have the characteristic V-shape typically observed in several systems [4][5][6][38][39][40] . An optic mode with an energy minimum of about 12 meV is in good agreement with the one determined experimentally with INS (see Fig.…”

Section: A Spin Waves In the Afm1 Phase Of Mn5si3mentioning

confidence: 68%

“…By analyzing the discontinuities in the evolution of the spin-wave energies as a function of the external field, we identified three phase transitions, marked as A, B, and C in Figs. 6.…”

Section: B Field-induced Phase Transitionsmentioning

confidence: 99%

“…Characteristic examples are the recent observation of large anomalous transport properties near room temperature, such as the anomalous Nernst 1 and Hall 2,3 effects, in the metallic noncollinear antiferromagnetic systems Mn 3 X (with X = Sn, Ge). In turn, these discoveries have initiated spectroscopic studies that have provided new insights of the intimate coupling between the various degrees of freedom, i.e., spin, lattice and electronic, which could explain the interesting anomalous phenomena in these materials [4][5][6] . Therefore, it is evident that an experimental study of the spin dynamics and a comparison with theoretical models is crucial for understanding the origin of noncollinear spin arrangements and the peculiar properties that arise in ordered solid materials.…”

Section: Introductionmentioning

confidence: 99%

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Complex magnetic structure and spin waves of the noncollinear antiferromagnet Mn5Si3

Biniskos,

Santos,

Schmalzl

et al. 2021

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Antichiral spin order, its soft modes, and their hybridization with phonons in the topological semimetal Mn3Ge

Cited by 42 publications

References 68 publications

Ground-state magnetic structure of Mn3Ge

Ground-state magnetic structure of Mn3Ge

Anomalous transport due to Weyl fermions in the chiral antiferromagnets Mn3X, X = Sn, Ge

Complex magnetic structure and spin waves of the noncollinear antiferromagnet Mn5Si3

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