Thermoelectric phenomena in an antiferromagnetic helix: Role of electric field

Abstract

The charge and spin-dependent thermoelectric responses are investigated on a single-helical molecule possessing a collinear antiferromagnetic spin arrangement with zero net magnetization in the presence of a transverse electric field. Both the short and long-range hopping scenarios are considered, which mimic biological systems like single-stranded DNA and $\alpha$-protein molecules. A non-equilibrium Green's function formalism is employed following the Landauer-Buttiker prescription to study the thermoelectric phenomena. The detailed dependence of the basic thermoelectric quantities on helicity, electric field, temperature etc., are elaborated on, and the underlying physics is explained accordingly. The charge and spin \textit{figure of merits} are computed and compared critically. For a more accurate estimation, the phononic contribution towards thermal conductance is also included. The present proposition shows a favorable spin-dependent thermoelectric response compared to the charge counterpart.

11 pages, 8 figures, comments are Welcome

References in corpus (12)

• Direct electronic measurement of the spin Hall effect
• Purely Antiferromagnetic Magnetoelectric Random Access Memory
• Giant thermopower and figure of merit in single-molecule devices
• Proximity of antiferromagnetism and superconductivity in LaO${}_{1-x}$F${}_x$FeAs: effective Hamiltonian from ab initio studies
• Violation of the Wiedemann-Franz Law in a Single-Electron Transistor
• Thermo-spin effects in a quantum dot connected to ferromagnetic leads
• Quantum rings as electron spin beam splitters
• Imaging mesoscopic spin Hall flow: Spatial distribution of local spin currents and spin densities in and out of multiterminal spin-orbit coupled semiconductor nanostructures
• Curvilinear one-dimensional antiferromagnets
• Terahertz frequency spectrum analysis with a nanoscale antiferromagnetic tunnel junction
• Spin-selective transmission through a single-stranded magnetic helix
• Helical Antiferromagnetic Ordering in Lu{1-x}Sc{x}MnSi (x = 0, 0.25, 0.50)

Cited by in corpus (4)

• Manipulation by magnetic frustration in ferrotoroidal spin chains via curvature and torsion
• Critical analysis of multiple reentrant localization in an antiferromagnetic helix with transverse electric field: Hopping dimerization-free scenario
• Spin caloritronics in collinear ferromagnetic helical structures under irradiation
• Photo-induced directional transport in extended SSH chains