Comment on “Disentangling Orbital and Valley Hall Effects in Bilayers of Transition Metal Dichalcogenides”

Du, Luojun

doi:10.1103/physrevlett.127.149701

Cited by 7 publications

(5 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is worth mentioning that we cannot understand the transport of OAM in the bilayer of 2H-TMD in terms of the valley Hall effect of individual layers [74]. For any infinitesimally small but finite interlayer hopping t ⊥ , the states of individual layers combine to form the bonding and antibonding superpositions , as seen in Eq.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Orbital Hall effect in bilayer transition metal dichalcogenides: From the intra-atomic approximation to the Bloch states orbital magnetic moment approach

Cysne,

Bhowal,

Vignale

et al. 2022

Preprint

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 99%

“…In addition, as anticipated in Ref. [75], the transport of magnetic moment in unbiased bilayer 2H-TMD cannot be understood in terms of the individual layers [74], being necessary to employ the scheme based on OHE introduced in Ref. [55] together with the non-Abelian structure of the magnetic moment matrix [Eqs.…”

Section: Application To Unbiased Bilayer Of 2h-tmdmentioning

confidence: 99%

Orbital Hall effect in bilayer transition metal dichalcogenides: From the intra-atomic approximation to the Bloch states orbital magnetic moment approach

Cysne,

Bhowal,

Vignale

et al. 2022

Preprint

View full text Add to dashboard Cite

“…In summary, we do not believe that the main points of our Letter are affected by the Comment [1]. Tarik P. Cysne , 1,* Marcio Costa, 1 Luis M. Canonico, 2 M. Buongiorno Nardelli, 3 R. B. Muniz 1 and Tatiana G. Rappoport 4,5…”

mentioning

confidence: 85%

Cysne et al. Reply:

et al. 2021

View full text Add to dashboard Cite

The outline presented by Du in the Comment [1] on our Letter [2] partially agrees with the pictorial view we have used to explain the orbital-Hall effect (OHE) in transition metal dichalcogenide (TMD) bilayers. In fact, most of the phenomenological description of the OHE effect in the TMD bilayer that he brought up in the Comment [1] is discussed in the third section-Low energy calculations-of our Letter [2]. Notwithstanding, according to Du [1], the OHE that we have shown to occur in 2H-TMD bilayers should be termed the "hidden valley-Hall effect," and the Berry curvatures of the two valence bands as "hidden Berry curvatures." We do not believe that such terminology brings new insights to our Letter.

show abstract

“…In addition, we point out that in the layer-valley Hall effect, carriers in the 𝐾 (−𝐾) valley of the upper layer and −𝐾 (𝐾) of lower layer flow in the same transverse direction, the net valley Hall effect remains zero, as imposed by the global inversion symmetry. [10,11,27] In close resemblance to the coupled valley and spin DoFs in the valence band of monolayer TMDCs, [11] the combined layer-valley DoF is coupled with spin DoF in bilayer TMDCs. Specifically, for top valence bands, the layer-valley configurations 𝛾 = 𝜅𝜏 = 1/ − 1 are coupled exclusively with spin-up/spin-down.…”

mentioning

confidence: 93%

Layer-Valley Hall Effect under Inversion and Time-Reversal Symmetries

Zhao 赵,

Liu 刘,

Chen 陈

et al. 2024

Chinese Phys. Lett.

View full text Add to dashboard Cite

Hall effects have been the central paradigms in modern physics, materials science and practical applications, and have led to many exciting breakthroughs, including the discovery of topological Chern invariants and the revolution of metrological resistance standard. To date, the Hall effects have mainly focused on a single degree of freedom (DoF), and most of them require the breaking of spatial-inversion and/or time-reversal symmetries. Here we demonstrate a new type of Hall effect—layer-valley Hall effect—based on a combined layer-valley DoF characterized by the product of layer and valley indices. The layer-valley Hall effect has a quantum origin arising from the layer-valley contrasting Berry curvature, and can occur in nonmagnetic centrosymmetric crystals with both spatial-inversion and time-reversal symmetries, transcending the symmetry constraints of single DoF Hall effect based on the constituent layer or valley index. Moreover, the layer-valley Hall effect is highly tunable and shows a ‘W’ pattern in response to the out-of-plane electric fields. Additionally, we discuss the potential detection approaches and material-specific design principles of layer-valley Hall effect. Our results demonstrate novel Hall physics and open up exotic paradigms for new research direction of layer-valleytronics that exploits the quantum nature of the coupled layer-valley DoF.

show abstract

Comment on “Disentangling Orbital and Valley Hall Effects in Bilayers of Transition Metal Dichalcogenides”

Cited by 7 publications

References 16 publications

Orbital Hall effect in bilayer transition metal dichalcogenides: From the intra-atomic approximation to the Bloch states orbital magnetic moment approach

Orbital Hall effect in bilayer transition metal dichalcogenides: From the intra-atomic approximation to the Bloch states orbital magnetic moment approach

Cysne et al. Reply:

Layer-Valley Hall Effect under Inversion and Time-Reversal Symmetries

Contact Info

Product

Resources

About