Charge density wave generated Fermi surfaces in 
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Chikina, Alla; Lund, Henriette E.; Bianchi, Marco S.; Curcio, Davide; Dalgaard, Kirstine J.; Bremholm, Martin; Lei, Shiming; Singha, Ratnadwip; Schoop, Leslie M.; Hofmann, Philip

doi:10.1103/physrevb.107.l161103

Cited by 11 publications

(4 citation statements)

References 47 publications

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“…Also note that the bilayer splitting (Δ k z ) increases with E for the different k x and this trend is observed in both experiment and theory (see Supplementary Table 2) . Similar variation of Δ k z has been recently reported for NdTe 3 62 . The agreement of ARPES and EBS is also good at larger E : the main bands around 0.8 eV become flatter and move to lower E .…”

Section: Resultssupporting

confidence: 89%

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Charge density wave induced nodal lines in LaTe3

et al. 2023

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LaTe3 is a non-centrosymmetric material with time reversal symmetry, where the charge density wave is hosted by the Te bilayers. Here, we show that LaTe3 hosts a Kramers nodal line—a twofold degenerate nodal line connecting time reversal-invariant momenta. We use angle-resolved photoemission spectroscopy, density functional theory with an experimentally reported modulated structure, effective band structures calculated by band unfolding, and symmetry arguments to reveal the Kramers nodal line. Furthermore, calculations confirm that the nodal line imposes gapless crossings between the bilayer-split charge density wave-induced shadow bands and the main bands. In excellent agreement with the calculations, spectroscopic data confirm the presence of the Kramers nodal line and show that the crossings traverse the Fermi level. Furthermore, spinless nodal lines—completely gapped out by spin-orbit coupling—are formed by the linear crossings of the shadow and main bands with a high Fermi velocity.

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Section: Resultssupporting

confidence: 89%

“…4 b, c). This gap has been referred to as the CDW gap in LaTe 3 36 and other RTe 3 systems 45 , 49 , 50 , 62 , 64 . A discussion about the variation of the CDW gap of LaTe 3 with k x and k y is provided in the Supplementary Note 5 .…”

Section: Resultsmentioning

confidence: 99%

Charge density wave induced nodal lines in LaTe3

et al. 2023

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“…1 a) [18]. Tellurium 5p electrons are are highly localized in Te 2 square net bilayers (ac plane), in which they form highly dispersive bands with elevated Fermi velocity [16,[19][20][21]. This quasi two-dimensional electronic structure amplifies correlation phenomena, such as the formation of charge-density wave (CDW) order [22] and superconductivity [23,24], while also hosting protected band degeneracies [16,25].…”

Section: Main Textmentioning

confidence: 99%

Non-coplanar helimagnetism in the layered van-der-Waals metal DyTe3

Akatsuka

Gao

Aji

et al. 2023

Preprint

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Magnetic materials with highly anisotropic chemical bonding can be exfoliated to realize ultrathin sheets or interfaces with highly controllable optical or spintronics responses, while also promising novel cross-correlation phenomena between electric polarization and the magnetic texture. The vast majority of these van-der-Waals magnets are collinear ferro-, ferri-, or antiferromagnets, with a particular scarcity of lattice-incommensurate helimagnets of defined left- or right-handed rotation sense, or helicity. Here we use polarized neutron scattering to reveal cycloidal, or conical, magnetic structures in DyTe3, where insulating double-slabs of dysprosium square nets are separated by highly metallic tellurium layers. We identify a hierarchy of energy scales with - in order of decreasing strength - antiferromagnetic exchange interactions, magnetocrystalline anisotropy, and periodic modulations of the exchange energy. The latter are attributed to magneto-elastic coupling to the unconventional charge order in DyTe3. This easily cleavable metallic helimagnet also hosts a complex magnetic phase diagram indicative of competing interactions. Our work paves the way for twistronics research, where helimagnetic layers can be combined to form complex spin textures on-demand, using the vast family of rare earth chalcogenides and beyond.

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“…Angle-resolved photoemission spectroscopy (ARPES) 36 , 37 has been a useful tool to directly probe the energy-momentum dispersion in quantum materials. It has been extensively used to study the electronic structure of in the investigation of FS and CDW induced gap 17 , 38 – 47 . The gap size is found to depend on momentum, and the maximum gap changes as a function of the rare-earth element R , which can be modeled by a nesting driven sinusoidal CDW 40 .…”

Section: Introductionmentioning

confidence: 99%

Observation of momentum-dependent charge density wave gap in a layered antiferromagnet $${\textrm{Gd}}{\textrm{Te}}_{3}$$

Regmi,

Bin Elius,

Sakhya

et al. 2023

Sci Rep

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Charge density wave (CDW) ordering has been an important topic of study for a long time owing to its connection with other exotic phases such as superconductivity and magnetism. The $$R{\textrm{Te}}_{3}$$ R Te 3 (R = rare-earth elements) family of materials provides a fertile ground to study the dynamics of CDW in van der Waals layered materials, and the presence of magnetism in these materials allows to explore the interplay among CDW and long range magnetic ordering. Here, we have carried out a high-resolution angle-resolved photoemission spectroscopy (ARPES) study of a CDW material $${\textrm{Gd}}{\textrm{Te}}_{3}$$ Gd Te 3 , which is antiferromagnetic below $$\sim \mathrm {12~K}$$ ∼ 12 K , along with thermodynamic, electrical transport, magnetic, and Raman measurements. Our ARPES data show a two-fold symmetric Fermi surface with both gapped and ungapped regions indicative of the partial nesting. The gap is momentum dependent, maximum along $${\overline{\Gamma }}-\mathrm{\overline{Z}}$$ Γ ¯ - Z ¯ and gradually decreases going towards $${\overline{\Gamma }}-\mathrm{\overline{X}}$$ Γ ¯ - X ¯ . Our study provides a platform to study the dynamics of CDW and its interaction with other physical orders in two- and three-dimensions.

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Charge density wave generated Fermi surfaces in NdTe3

Cited by 11 publications

References 47 publications

Charge density wave induced nodal lines in LaTe3

Charge density wave induced nodal lines in LaTe3

Non-coplanar helimagnetism in the layered van-der-Waals metal DyTe3

Observation of momentum-dependent charge density wave gap in a layered antiferromagnet $${\textrm{Gd}}{\textrm{Te}}_{3}$$

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