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Article
Chao-xing Liu
The Pennsylvania State University
Corresponding Author
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We predict that dynamical strain can induce a bulk orbital magnetization in time-reversal- (TR-) invariant Weyl semimetals (WSMs) that are gapped by charge-density waves (CDWs) -- a class of systems experimentally observed this past year.
We term this effect the dynamical piezomagnetic effect" (DPME).
By studying the low-energy effective theory and a minimal tight-binding (TB) model, we find that the DPME originates from an effective valley axion field that couples the electromagnetic gauge field with a strain-induced pseudo-gauge field.
In particular, the DPME represents the first example of a fundamentally 3D strain effect originating from the Chern-Simons 3-form, in contrast to the previously-studied piezoelectric effects characterized by 2D Berry curvature.
We further find that the DPME has a discontinuous change when the surface of the system undergoes a topological quantum phase transition (TQPT), and thus, that the DPME provides a bulk signature of a boundary TQPT in a TR-invariant Weyl-CDW.
Keywords
dynamical piezomagnetic effect, orbital magnetization
There is NO Competing Interest.
This is a list of supplementary files associated with this preprint. Click to download.
- DPMENatCommSM.pdf
Supplementary Materials for Dynamical Piezomagnetic Effect in Time-Reversal-Invariant Weyl Semimetals with Axionic Charge-Density Waves
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A new preprint design is coming!
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This is a preprint, a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Article
Chao-xing Liu
The Pennsylvania State University
Corresponding Author
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
History
CURRENT STATUS: Posted
Version 1
Posted 10 Jun, 2021
No community comments so far
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
License:
This work is licensed under a CC BY 4.0 License. Read Full License
We predict that dynamical strain can induce a bulk orbital magnetization in time-reversal- (TR-) invariant Weyl semimetals (WSMs) that are gapped by charge-density waves (CDWs) -- a class of systems experimentally observed this past year.
We term this effect the dynamical piezomagnetic effect" (DPME).
By studying the low-energy effective theory and a minimal tight-binding (TB) model, we find that the DPME originates from an effective valley axion field that couples the electromagnetic gauge field with a strain-induced pseudo-gauge field.
In particular, the DPME represents the first example of a fundamentally 3D strain effect originating from the Chern-Simons 3-form, in contrast to the previously-studied piezoelectric effects characterized by 2D Berry curvature.
We further find that the DPME has a discontinuous change when the surface of the system undergoes a topological quantum phase transition (TQPT), and thus, that the DPME provides a bulk signature of a boundary TQPT in a TR-invariant Weyl-CDW.
There is NO Competing Interest.
This is a list of supplementary files associated with this preprint. Click to download.
- DPMENatCommSM.pdf
Supplementary Materials for Dynamical Piezomagnetic Effect in Time-Reversal-Invariant Weyl Semimetals with Axionic Charge-Density Waves
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