Spin effects in ferromagnetic single-electron transistors

Abstract

Electron tunneling in ferromagnetic single-electron transistors is considered theoretically in the sequential tunneling regime. A new formalism is developed, which operates in a two-dimensional space of states, instead of one-dimensiona space used in the spinless case. It is shown that spin fluctuations can be significantly larger than the charge fluctuations. The influence of discrete energy spectrum of a small central electrode on tunneling current, charge and spin accumulation, charge and spin fluctuations, and on tunnel magnetoresistance is analyzed in details. Two different scales are found in the bias dependence of the basic transport characteristics; the shorter one originates from the discrete energy spectrum and the longer one from discrete charging of the central electrode. The features due to discrete spectrum and discrete charging disappear at high temperatures.

RevTeX, 25 pages, 10 figures, revised and accepted by Phys. Rev. B

References in corpus (1)

• Shot noise in ferromagnetic single electron tunneling devices

Cited by in corpus (21)

• Electric Field Control of Spin Transport
• Theory of Transport through Quantum-Dot Spin Valves in the Weak-Coupling Regime
• Interaction-driven spin precession in quantum-dot spin valves
• Spin-Dependent Transport Through An Interacting Quantum Dot
• Rate equations for Coulomb blockade with ferromagnetic leads
• Spin effects in single electron tunneling
• Electric-field control of tunneling magnetoresistance effect in a Ni/InAs/Ni quantum-dot spin valve
• Devices with electrically tunable topological insulating phases
• Spin accumulation in ferromagnetic single-electron transistors in the cotunneling regime
• Time-Dependent Spin-Polarized Transport Through a Resonant Tunneling Structure with Multi-Terminal
• A Model for Ferromagnetic Nanograins with Discrete Electronic States
• Spin-Related Current Suppression in a Semiconductor-Quantum-Dot Spin-Diode Structure
• Spin polarized current and shot noise in carbon nanotube quantum dot in the Kondo regime
• Angular Conductance Resonances of Quantum Dots Non-Collinearly Coupled to Ferromagnetic Leads
• Mesoscopic Tunneling Magnetoresistance
• Nonequilibrium excitations in Ferromagnetic Nanoparticles
• Gate-controlled spin polarized current in ferromagnetic single electron transistors
• Theory of transport through noncollinear single-electron spin-valve transistors
• Modelling Electron Spin Accumulation in a Metallic Nanoparticle
• Conductance in Co/Al2O3/Si/Al2O3 permalloy with asymmetrically doped barrier
• Current fluctuations of noncollinear single-electron spin-valve transistors