Intrinsic nonlinear Nernst and Seebeck effect

Abstract

The Nernst and Seebeck effects are crucial for thermoelectric energy harvesting. However, the linear anomalous Nernst effect requires magnetic materials with intrinsically broken time-reversal symmetry. In non-magnetic systems, the dominant transverse thermoelectric response is the nonlinear Nernst current. Here, we investigate nonlinear Nernst and Seebeck effects to reveal intrinsic scattering-free Seebeck and Nernst currents arising from band geometric effects in bipartite antiferromagnets (parity-time-reversal symmetric systems). We show that these contributions, independent of scattering time, originate from the Berry connection polarizability tensor which depends on the quantum metric. Using CuMnAs as a model system, we demonstrate the dominance of intrinsic nonlinear Seebeck and Nernst currents over other scattering-dependent contributions. Our findings deepen the fundamental understanding of nonlinear thermoelectric phenomena and provide the foundation for using them to develop more efficient, next-generation energy harvesting devices.

9 pages, 4 figures, 1 table

References in corpus (13)

• Berry phase effect in anomalous thermoelectric transport
• Thermoelectric energy harvesting with quantum dots
• Quantum metric nonlinear Hall effect in a topological antiferromagnetic heterostructure
• The thermopower and Nernst Effect in graphene in a magnetic field
• Electric control of Dirac quasiparticles by spin-orbit torque in an antiferromagnet
• Large anomalous Nernst effect in a van der Waals ferromagnet Fe${}_3$GeTe${}_2$
• Quantum geometry in condensed matter
• Topological Nonlinear Anomalous Nersnt Effect in Strained Transition Metal Dichalcogenides
• Thermopower and Unconventional Nernst in the Predicted Type-II Weyl Semi-metal WTe${}_2$
• Intrinsic Hall conductivities induced by the orbital magnetic moment
• Detecting Lifshitz Transitions Using Nonlinear Conductivity in Bilayer Graphene
• Nonlinear electrical transport unveils Fermi surface malleability in a moiré heterostructure
• Nonlinear Seebeck effect in Ni${}_{81}$Fe${}_{19}$|Pt at room temperature

Cited by in corpus (3)

• Planar Nernst effect from hidden band geometry in layered two-dimensional materials
• Nonlinear spin-Seebeck diode in $f$-wave magnets, third-order spin-Nernst effects in $g$-wave magnets and spin-Nernst effects in $i$-wave altermagnets
• Intrinsic nonlinear valley Nernst effect in the strained bilayer graphene