Temperature dependence of electronic transport through molecular magnets in the Kondo regime

Abstract

The effects of finite temperature in transport through nanoscopic systems exhibiting uniaxial magnetic anisotropy D, such as molecular magnets, adatoms, or quantum dots side-coupled to a large spin are analyzed in the Kondo regime. The linear-response conductance is calculated by means of the full density-matrix numerical renormalization group method as a function of temperature T, magnetic anisotropy D, and exchange coupling J between the molecule's core spin and the orbital level. It is shown that such system displays a two-stage Kondo effect as a function of temperature and a quantum phase transition as a function of the exchange coupling J. Moreover, additional peaks are found in the linear conductance for temperatures of the order of T\sim|J| and T\simD. It is also shown that the conductance variation with T remarkably depends on the sign of the exchange coupling J.

8 pages, 6 figures (version as accepted for publication in Physical Review B)

References in corpus (17)

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Cited by in corpus (10)

• Coulomb blockade and Kondo effect in the electronic structure of Hubbard molecules connected to metallic leads: a finite-temperature exact-diagonalization study
• Transverse anisotropy effects on spin-resolved transport through large-spin molecules
• Spin-resolved dynamical conductance of correlated large-spin magnetic molecules
• Spin Seebeck effect of correlated magnetic molecules
• Dynamical spin accumulation in large-spin magnetic molecules
• Magnetic field modulated Kondo effect in a single-magnetic-ion molecule
• Time-dependent spintronic anisotropy in magnetic molecules
• Effect of uniaxial magnetic anisotropy on charge transport in a junction with a precessing anisotropic molecular spin
• Spin transport through a nanojunction with a precessing anisotropic molecular spin: Quantum interference and spin-transfer torque
• Effects of correlated hopping on thermoelectric response of a quantum dot strongly coupled to ferromagnetic leads