Thermoelectric transport properties of Floquet multi-Weyl semimetals

2020/01/31 by Tanay Nag, Anirudha Menon, Banasri Basu · 3 citations
Materials Science · Physics and Astronomy · #2D Materials and Applications #Advanced Thermoelectric Materials and Devices #Condensed matter physics #Floquet theory #Momentum (technical analysis) #Physics #Position and momentum space #Quantum electrodynamics #Quantum mechanics #Topological Materials and Phenomena #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevb.102.014307

published as Phys. Rev. B 102, 014307 (2020) · 14 pages, 4 figures

openalex publication_date 2020/07/13 · arxiv created 2020/07/14 · arxiv updated 2020/07/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We discuss the circularly polarized light (of amplitude A₀ and frequency \ensuremathω) driven thermoelectric transport properties of type-I and type-II multi-Weyl semimetals (mWSMs) in the high-frequency limit. Considering the low-energy model, we employ the Floquet-Kubo formalism to compute the thermal Hall and Nernst conductivities for both types of mWSMs. We show that the anisotropic nature of the dispersion for arbitrary integer monopole charge n>1 plays an important role in determining the effective Fermi surface behavior; interestingly, one can observe momentum-dependent corrections in Floquet mWSMs in addition to the momentum-independent contribution as observed for Floquet single WSMs. Apart from the nontrivial tuning of the Weyl node position \ifmmode±\else\textpm\fiQ\ensuremath→\ifmmode±\else\textpm\fiQ\ensuremath-A₀²ⁿ/\ensuremathω, our study reveals that the momentum-independent terms result in leading order contributions in the conductivity tensor. This has the form of n times the single-WSM results with effective chemical potential \ensuremathμ\ensuremath→\ensuremathμ\ensuremath-A₀²ⁿ/\ensuremathω. On the other hand, momentum-dependent corrections lead to subleading order terms which are an algebraic function of \ensuremathμ and are present for n>1. Remarkably, this analysis further allows us to distinguish type-I mWSMs from their type-II counterparts. For type-II mWSMs, we find that the transport coefficients for n\ensuremath≥2 exhibit an algebraic dependence on the momentum cutoff in addition to the weak logarithmic dependence as noticed for n=1 WSMs. We demonstrate the variation and qualitative differences of transport coefficients between type-I and type-II mWSM as a function of external driving parameter \ensuremathω.

Citations

• Chern Semimetal and the Quantized Anomalous Hall Effect inHgCr2Se4
• Solution of the Schrödinger Equation with a Hamiltonian Periodic in Time
• Photovoltaic Hall effect in graphene
• Chiral decomposition in the electronic structure of graphene multilayers
• Topological quantization of the spin Hall effect in two-dimensional paramagnetic semiconductors
• Weyl semimetal with broken time reversal and inversion symmetries
• Discovery of a Weyl fermion semimetal and topological Fermi arcs
• Chiral anomaly and classical negative magnetoresistance of Weyl metals
• Anomalous Floquet-Anderson Insulator as a Nonadiabatic Quantized Charge Pump
• Doping and tilting on optics in noncentrosymmetric multi-Weyl semimetals

Cited by

• RKKY interaction as a probe of spin splitting and odd-parity nature in Floquet collinear magnets
• Helicons in multi-Weyl semimetals
• Chiral magnetic effect in lattice models of tilted multi-Weyl semimetals