Observation of current-induced bulk magnetization in elemental tellurium

Furukawa, T.; Shimokawa, Yuri; Kobayashi, Kaya; Itou, Tetsuaki

doi:10.1038/s41467-017-01093-3

Cited by 150 publications

(118 citation statements)

References 26 publications

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“…1f). The spin degeneracy at the top of valence bands which crosses the Fermi level is lifted 18 because of the combination of the SOI of tellurium 5p orbitals and the noncentrosymmetric crystal structure; this property could trigger the electromagnetic effects (e.g., the current-induced optical activity 29 and magnetization in bulk 30 ).…”

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confidence: 99%

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Radial Spin Texture in Elemental Tellurium with Chiral Crystal Structure

et al. 2020

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The chiral crystal is characterized by a lack of mirror symmetry and an inversion center, resulting in the inequivalent right-and left-handed structures. In the noncentrosymmetric crystal structure, the spin and momentum of electrons are locked in the reciprocal space with the help of the spin-orbit interaction. To reveal the spin textures of chiral crystals, here we investigate the spin and electronic structure in p-type semiconductor elemental tellurium with a chiral crystal structure by using spin-and angle-resolved photoemission spectroscopy. Our data demonstrate that the highest valence band crossing the Fermi level has a spin component parallel to the electron momentum around the BZ corners. Significantly, we have also confirmed that the spin polarization is reversed in the crystal with the opposite chirality. The results indicate that the spin textures of the right-and left-handed chiral crystals are hedgehog-like, leading to unconventional magnetoelectric effects and nonreciprocal phenomena.

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“…The highest and second-highest bands are described by double group representations (H4, and H5, respectively) 18,21,22 , and thus the spin degeneracy of these is lifted. While the D3 symmetry requires no net spin polarization at the highly symmetrical H-point, non-zero spin polarization should appear off the H-point 25,28,30 .…”

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Radial Spin Texture in Elemental Tellurium with Chiral Crystal Structure

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“…Indeed, the authors of Ref. 32 conclude by speculating that the current-induced magnetization they observe in trigonal tellurium may be due not only to the well-known SEE, but also to the OEE.…”

Section: Orbital Edelstein Effectmentioning

confidence: 99%

“…A great deal of experimental work has focused on the Edelstein effect in 2D systems, notably in thin-film semiconductors [24][25][26][27][28][29] and at metal surfaces 30 . However, experiments on 3D materials have been scant, although some recent studies have reported its observation in trigonal tellurium 31,32 .…”

Section: Introductionmentioning

confidence: 99%

Orbital Edelstein effect from density-wave order

Massarelli

Paramekanti

2019

Phys. Rev. B

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Coupling between charge and spin, and magnetoelectric effects more generally, have been an area of great interest for several years, with the sought-after ability to control magnetic degrees of freedom via charge currents serving as an impetus. The orbital Edelstein effect (OEE) is a kinetic magnetoelectric effect consisting of a bulk orbital magnetization induced by a charge current. It is the orbital analogue of the spin Edelstein effect in spin-orbit coupled materials, in which a charge current drives nonzero electron spin magnetization. The OEE has recently been investigated in the context of Weyl semimetals and Weyl metals. Motivated by these developments, we study a model of electrons without spin-orbit coupling which exhibits line nodes that get gapped out by via symmetry breaking due to an interaction-induced charge density wave order. This model is shown to exhibit a temperature dependent OEE, which appears due to symmetry reduction into a gyrotropic crystal class.

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“…It is useful to focus on the case of M J in Eqs. (5) and (6), and this component is denoted as α orb . Figure 2 4)].…”

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Magnetoelectric Effects and Charge-Imbalanced Solenoids: Antiferro Quadrupole Orders in a Diamond Structure

Ishitobi

Hattori

2019

J. Phys. Soc. Jpn.

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We study magnetoelectric (magneto-current) effects in a diamond structure under antiferro quadrupole (AFQ) orders. The AFQ orders break the spatial inversion symmetry and cause the current-induced magnetization. The current-induced magnetization strongly depends on the types of the order parameters and the direction of the current. This gives a way to the experimental identification of AFQ order parameters. We also discuss the current-induced magnetization under the AFQ orders in the diamond structure can be intuitively understood in terms of charge-imbalanced solenoids.arXiv:1903.01103v2 [cond-mat.str-el]

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Observation of current-induced bulk magnetization in elemental tellurium

Cited by 150 publications

References 26 publications

Radial Spin Texture in Elemental Tellurium with Chiral Crystal Structure

Radial Spin Texture in Elemental Tellurium with Chiral Crystal Structure

Orbital Edelstein effect from density-wave order

Magnetoelectric Effects and Charge-Imbalanced Solenoids: Antiferro Quadrupole Orders in a Diamond Structure

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