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Pseudogauge field d...
Pseudogauge field driven acoustoelectric current in two-dimensional hexagonal Dirac materials
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- Bhalla, Pankaj (författare)
- Stockholms universitet,Nordiska institutet för teoretisk fysik (Nordita),Nordita SU; Stockholm Univ, Hannes Alfvens Vag 12, S-10691 Stockholm, Sweden.
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- Vignale, Giovanni (författare)
- Univ Missouri, Dept Phys & Astron, Columbia, MO 65211 USA.
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- Rostami, Habib (författare)
- Stockholms universitet,Nordiska institutet för teoretisk fysik (Nordita),Nordita SU;Stockholm Univ, Hannes Alfvens Vag 12, S-10691 Stockholm, Sweden.
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(creator_code:org_t)
- American Physical Society (APS), 2022
- 2022
- Engelska.
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Ingår i: Physical Review B. - : American Physical Society (APS). - 2469-9950 .- 2469-9969. ; 105:12
- Relaterad länk:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Using a diagrammatic scheme, we study the acoustoelectric effects in two-dimensional (2D) hexagonal Dirac materials due to the sound-induced pseudogauge field. We analyze both uniform and spatially dispersive currents in response to copropagating and counterpropagating sound waves, respectively. In addition to the longitudinal acoustoelectric current, we obtain an exotic transverse charge current flowing perpendicular to the sound propagation direction owing to the interplay of transverse and longitudinal gauge field components j(T) proportional to A(L)A(T)*. In contrast to the almost isotropic directional profile of the longitudinal uniform current, a highly anisotropic transverse component j(T) similar to sin(6 theta) is achieved that stems from the inherited threefold symmetry of the hexagonal lattice. However, both longitudinal and transverse parts of the dispersive current are predicted to be strongly anisotropic similar to sin(2)(theta) or cos(2)(3 theta). We quantitatively estimate the pseudogauge field contribution to the acoustoelectric current that can be probed in future experiments in graphene and other 2D hexagonal Dirac materials.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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