Quantum thermal transport in stanene

Abstract

By way of the non-equilibrium Green's function simulations and analytical expressions, the quantum thermal conductance of stanene is studied. We find that, due to the existence of Dirac fermion in stanene, the ratio of electron thermal conductance and electric conductance becomes a chemical-potential-dependent quantity, violating the Wiedemann-Franz law. This finding is applicable to any two-dimensional (2D) materials that possess massless Dirac fermions. In strong contrast to the negligible electronic contribution in graphene, surprisingly, the electrons and phonons in stanene carry a comparable heat current. The unusual behaviours in stanene widen our knowledge of quantum thermal transport in 2D materials.

References in corpus (24)

• Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
• The electronic properties of graphene
• Thermal Properties of Graphene, Carbon Nanotubes and Nanostructured Carbon Materials
• Epitaxial Growth of Two-Dimensional Stanene
• Low-energy effective Hamiltonian involving spin-orbit coupling in Silicene and Two-Dimensional Germanium and Tin
• Phononics: Manipulating heat flow with electronic analogs and beyond
• Large-gap quantum spin Hall insulators in tin films
• Colloquium: The transport properties of graphene: An introduction
• Observation of the Dirac fluid and the breakdown of the Wiedemann-Franz law in graphene
• Quantum thermal transport in nanostructures
• Lattice Vibrational Modes and Phonon Thermal Conductivity of Monolayer MoS2
• Enhanced Thermoelectric Performance and Anomalous Seebeck Effects in Topological Insulators
• Phonon Transport in Graphene
• Transition-Metal Pentatelluride ZrTe${}_5$ and HfTe${}_5$: a Paradigm for Large-gap Quantum Spin Hall Insulators
• Strong Thermal Transport Anisotropy and Strain Modulation in Single-Layer Phosphorene
• Epitaxial growth of large-gap quantum spin Hall insulator on semiconductor surface
• Intrinsic anisotropy of thermal conductance in graphene nanoribbons
• Elemental Topological Insulator with a Tunable Fermi Level: Strained α-Sn on InSb(001)
• Thermal transport in nanostructures
• Large-Gap Quantum Spin Hall States in Stanene Grown on Substrate
• A Gapless MoS${}_2$ Allotrope Possessing Both Massless Dirac and Heavy Fermions
• Dirac cone with helical spin polarization in ultrathin $\alpha$-Sn(001) films
• Formation of quantum spin Hall state on Si surface and energy gap scaling with strength of spin orbit coupling
• Thermal Conductivity of Nanotubes Revisited: Effects of Chirality, Isotope Impurity, Tube Length, and Temperature

Cited by in corpus (7)

• Parameterization of Stillinger-Weber Potential for Two-Dimensional Atomic Crystals
• Symmetry-adapted real-space density functional theory for cylindrical geometries: application to large X (X=C, Si, Ge, Sn) nanotubes
• Ideal strength of two-dimensional stanene may reach or exceed Griffith strength estimate
• Thermal engineering in low-dimensional quantum devices: a tutorial review of nonequilibrium Green's function methods
• Phonon anharmonicity and thermal conductivity of two-dimensional van der Waals materials: A review
• Transition regime in the ultrafast laser heating of solids
• Photo-induced spin and valley-dependent Seebeck effect in the low-buckled Dirac materials