Nonequilibrium transport via spin-induced subgap states in superconductor/quantum dot/normal metal cotunnel junctions

نویسندگان

  • V. Koerting
  • B. M. Andersen
  • K. Flensberg
  • J. Paaske
چکیده

V. Koerting,1,2,* B. M. Andersen,1 K. Flensberg,1 and J. Paaske1 1Nano-Science Center, Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark 2Niels Bohr International Academy, Niels Bohr Institute, University of Copenhagen, Blegdamsvej 17, DK-2100 Copenhagen Ø, Denmark Received 27 July 2010; revised manuscript received 8 October 2010; published 8 December 2010

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

ترابرد کوانتومی همدوس در اتصالات گرافینی فرومغناطیس - ابررسانا - فرومغناطیس

In this paper, we investigate the coherent quantum transport in grapheme-based ferromagnet-superconductor-ferromagent junctions within the framework of BCS theory using DBdG quasiparticles equation .The coherency with the finite size of superconductor region has two characteristic features subgap electron transport and oscillations of differential conductance. we show that periodic vanishing of...

متن کامل

Nonequilibrium transport through a spinful quantum dot with superconducting leads.

We study the nonlinear cotunneling current through a spinful quantum dot contacted by two superconducting leads. Applying a general nonequilibrium Green function formalism to an effective Kondo model, we study the rich variation in the IV characteristics with varying asymmetry in the tunnel coupling to source and drain electrodes. The current is found to be carried, respectively, by multiple An...

متن کامل

Size effects in the density of states in normal-metal-superconductor and superconductor-normal-metal-superconductor junctions.

The quasiparticle local density of states ~LDOS! is studied in clean normal-metal–superconductor ~NS! and superconductor–normal-metal–superconductor ~SNS! junctions with increasing transverse size, from quasione-dimensional to three-dimensional. It is shown that finite transverse dimensions are related to pronounced effects in the LDOS, such as fast oscillations superimposed on the quasiparticl...

متن کامل

Electron transport in normal-metalÕsuperconductor junctions

On the basis of the Keldysh method of nonequilibrium systems, we develop a theory of electron tunneling in normal-metal–superconductor junctions. By using the tunneling Hamiltonian model ~being appropriate for the tight-binding systems!, the tunneling current can be exactly obtained in terms of the equilibrium Green functions of the normal metal and the superconductor. We calculate the conducta...

متن کامل

Bistability in the Electric Current through a Quantum-Dot Capacitively Coupled to a Charge-Qubit

We investigate the electronic transport through a single-level quantum-dot which is capacitively coupled to a charge-qubit. By employing the method of nonequilibrium Green's functions, we calculate the electric current through quantum dot at finite bias voltages. The Green's functions and self-energies of the system are calculated perturbatively and self-consistently to the second order of inte...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2010