Linear magnetochiral transport in tilted type-I and type-II Weyl semimetals

Das, Kamal; Agarwal, Amit

doi:10.1103/physrevb.99.085405

Cited by 92 publications

(105 citation statements)

References 85 publications

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“…The impact of the tilt on the magnetoconductivity in type-I and type-II WSM was explored in Ref. [58]. Here, we generalize those results to include the effect of the OMM.…”

Section: Magnetoconductivity In Type-i and Type-ii Wsmsmentioning

confidence: 69%

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Berry curvature induced thermopower in type-I and type-II Weyl semimetals

Das

Agarwal

2019

Phys. Rev. B

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Berry curvature acts analogously to a magnetic field in the momentum-space, and it modifies the flow of charge carriers and entropy. This induces several intriguing magnetoelectric and magnetothermal transport phenomena in Weyl semimetals. Here, we explore the impact of the Berry curvature and orbital magnetization on the thermopower in tilted type-I and type-II Weyl semimetals, using semiclassical Boltzmann transport formalism. We analytically calculate the full magnetoconductivity matrix and use it to obtain the thermopower matrix for different orientations of the magnetic field (B), with respect to the tilt axis. We find that the tilt of the Weyl nodes induces linear magnetic field terms in the conductivity matrix, as well as in the thermopower matrix. The linear-B term appears in the Seebeck coefficients, when the B-field is applied along the tilt axis. Applying the magnetic field in a plane perpendicular to the tilt axis results in a quadratic-B planar Nernst effect, linear-B out-of-plane Nernst effect and quadratic-B correction in the Seebeck coefficient. arXiv:1903.01205v3 [cond-mat.mes-hall]

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“…The impact of the tilt on the magnetoconductivity in type-I and type-II WSM was explored in Ref. [58]. Here, we generalize those results to include the effect of the OMM.…”

Section: Magnetoconductivity In Type-i and Type-ii Wsmsmentioning

confidence: 69%

“…Here, σ 12 = σ xy denotes the planar Hall conductivity and in addition there are new linear-B terms such as σ 13 = σ xz and σ 23 = σ yz , which were discussed in Ref. [58].…”

Section: Magnetoconductivity In Type-i and Type-ii Wsmsmentioning

confidence: 99%

Berry curvature induced thermopower in type-I and type-II Weyl semimetals

Das

Agarwal

2019

Phys. Rev. B

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“…To reach a steady state in presence of chiral charge and energy pumping between the two Weyl nodes, the collision integral (I coll ) should include both the intra-node (τ 0 ) as well as the inter-node (τ v ) scattering timescales. Furthermore, owing to the chiral charge and energy pumping, each of the Weyl nodes is assumed to acquire a local equilibrium (LE) chemical potential µ s ≡ µ + δµ s [15,38] and temperature T s = T + δT s . Within this approximation the steady state collision integral is given by…”

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confidence: 99%

Thermal and gravitational chiral anomaly induced magneto-transport in Weyl semimetals

Das

Agarwal

2020

Phys. Rev. Research

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Quantum anomalies in Weyl semimetal (for either E · B = 0 or ∇T · B = 0) leads to chiral charge and energy pumping between the opposite chirality nodes. This results in chiral charge and energy imbalance between the Weyl nodes which manifests in several intriguing magneto-transport phenomena. Here, we investigate the role of electrical-, thermal-, and gravitational chiral anomaly on magneto-transport in Weyl semimetals. We predict the planar Ettinghausen and Righi-Leduc effect to be a distinct signature of these quantum anomalies. We also demonstrate a significant enhancement in the thermo-electric conductivity, Seebeck effect, Nernst effect and thermal conductivity with increasing temperature. Interestingly, this anomaly induced transport violates the Wiedemann-Franz law and Mott relation.

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“…In this paper, we present a renormalization group analysis of the interplay of disorder and interactions in threedimensional Weyl fermions with a tilted and anisotropic dispersion. Including both disorder and electromagnetic perturbations stabilizes the SM phase in untilted arXiv:1904.12648v1 [cond-mat.mes-hall] 29 Apr 2019 isotropic cones 32 . Whereas the degree of tilting is increased by disorder 33 , Coulomb interaction tends to decrease it 34 .…”

Section: Introductionmentioning

confidence: 99%

Interplay of disorder and interactions in a system of subcritically tilted and anisotropic three-dimensional Weyl fermions

Sikkenk

Fritz

2019

Phys. Rev. B

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We study the effects of disorder and Coulomb interactions on the physics of three-dimensional type-I Weyl fermions with tilted and anisotropic dispersions in a renormalization group approach. To lowest non-trivial loop order we show that the tendency of the Coulomb interactions to restore the symmetry of the dispersion in the semimetallic region of the phase diagram dominates the stabilization of the tilt and anisotropy favored by weak disorder. We argue that the topology of the renormalization flow of the disorder and Coulomb couplings is essentially determined by gauge invariance, so that these findings continue to hold qualitatively at any order in perturbation theory.

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Linear magnetochiral transport in tilted type-I and type-II Weyl semimetals

Cited by 92 publications

References 85 publications

Berry curvature induced thermopower in type-I and type-II Weyl semimetals

Berry curvature induced thermopower in type-I and type-II Weyl semimetals

Thermal and gravitational chiral anomaly induced magneto-transport in Weyl semimetals

Interplay of disorder and interactions in a system of subcritically tilted and anisotropic three-dimensional Weyl fermions

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