Theory of shot noise in single-walled metallic carbon nanotubes weakly coupled to nonmagnetic and ferromagnetic leads

Abstract

We present theoretical study of shot noise in single wall metallic carbon nanotubes weakly coupled to either nonmagnetic or ferromagnetic leads. Using the real-time diagrammatic technique, we calculate the current, Fano factor and tunnel magnetoresistance in the sequential tunneling regime. It is shown that the differential conductance displays characteristic four-fold periodicity, indicating single-electron charging. Such a periodicity is also visible in tunnel magnetoresistance of the system as well as in the Fano factor. The present studies elucidate the impact of ferromagnetic (vs. nonmagnetic) contacts on the transport characteristics under consideration.

References in corpus (9)

• Nanospintronics with carbon nanotubes
• Shot noise in tunneling transport through molecules and quantum dots
• Electronic excitation spectrum of metallic carbon nanotubes
• Super-poissonian noise, negative differential conductance, and relaxation effects in transport through molecules, quantum dots and nanotubes
• Magnetoresistance of a quantum dot with spin-active interfaces
• Shot noise in tunneling through a single quantum dot
• Linear and nonlinear transport across carbon nanotube quantum dots
• Non-Fermi liquid behavior in transport across carbon nanotube quantum dots
• Theoretical studies of spin-dependent electrical transport through carbon nanotbes

Cited by in corpus (11)

• Tunneling through molecules and quantum dots: master-equation approaches
• Spin effects in single electron tunneling
• Spin-induced charge correlations in transport through interacting quantum dots with ferromagnetic leads
• Probing the exchange field of a quantum-dot spin valve by a superconducting lead
• Spin polarized current and shot noise in carbon nanotube quantum dot in the Kondo regime
• Spin diode based on a single-wall carbon nanotube
• Transport through single-wall metallic carbon nanotubes in the cotunneling regime
• Influence of spin waves on transport through a quantum-dot spin valve
• What can we learn about the dynamics of transported spins by measuring shot noise in spin-orbit-coupled nanostructures?
• Charge transport through weakly open one dimensional quantum wires
• Dependence of electronic and optical properties on a high-frequency field for carbon nanotubes