TITLE

Resonant effects in ballistic Josephson junctions

AUTHOR(S)
Radovic, Z.; Paltoglou, V.; Lazarides, N.; Flytzanis, N.
PUB. DATE
May 2009
SOURCE
European Physical Journal B -- Condensed Matter;May2009, Vol. 69 Issue 2, p229
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We study the Josephson effect in ballistic double-barrier SINIS planar junctions, consisting of bulk superconductors (S), a clean normal metal or semiconductor (N), and insulating interfaces (I) modeled as a d-function potential-energy barriers. We solve the scattering problem based on the Bogoliubov-de Gennes equations and derive a general expression for the dc Josephson current, valid for arbitrary interfacial transparency, the Fermi wave vectors mismatch, and for different effective band masses. The effect of transmission resonances on the Josephson current and on the normal conductance is analyzed for short junctions. Curvature of the temperature dependence of the critical Josephson current is related to the presence of resonances at the Fermi level and to the interfacial transparency. For thin semiconductor layers with negative effective masses of the carriers, finite interfacial transparency and large Fermi wave vectors mismatch we find that an unusual and significant enhancement of both the normal conductance and the critical Josephson current occurs at low temperatures due to the presence of an evanescent mode localized at interfaces.
ACCESSION #
40306239

 

Related Articles

  • Manifestation of Geometric Effects in Temperature Behavior of AC Magnetic Response of Josephson Junction Arrays. Sergeenkov, S.; Araujo-Moreira, F. M. // JETP Letters;12/10/2004, Vol. 80 Issue 11, p580 

    By improving the resolution of a homemade mutual-inductance measurement technique, a pronounced steplike structure (with the number of steps n = 4 for all ac fields) has been observed in the temperature dependence of ac susceptibility in artificially prepared two-dimensional Josephson junction...

  • On the origin of reentrance in 2D Josephson junction arrays. Araujo-Moreira, F. M.; Maluf, W.; Sergeenkov, S. // European Physical Journal B -- Condensed Matter;Mar2005, Vol. 44 Issue 1, p33 

    A comparative study of the magnetic properties of shunted and unshunted two-dimensional Josephson junction arrays (2D-JJA) is presented. Using a single-plaquette approximation of the 2D-JJA model, we were able to successfully fit all our experimental data (for the temperature, AC and DC field...

  • Edge-Type Josephson Junctions with Silicon Nitride Spacer. Vdovichev, S. N.; Klimov, A. Yu.; Nozdrin, Yu. N.; Rogov, V. V. // Technical Physics Letters;May2004, Vol. 30 Issue 5, p374 

    Edge-type Josephson junctions with a silicon nitride spacer possessing small capacitance have been fabricated at the butt-joint of two superconducting niobium films. The main results of experimental investigation of the electrical properties of these structures are presented. © 2004 MAIK...

  • Theory of the Bloch oscillating transistor. Hassel, J.; Seppä, H. // Journal of Applied Physics;1/15/2005, Vol. 97 Issue 2, p023904 

    The Bloch oscillating transistor (BOT) is a device in which single electron current through a normal tunnel junction enhances Cooper pair current in a mesoscopic Josephson junction, leading to signal amplification. In this article we develop a theory in which the BOT dynamics is described as a...

  • Synchronization of underdamped Josephson-junction arrays. Filatrella, G.; Pedersen, N. Falsig; Lobb, C. John; Barbara, P. // European Physical Journal B -- Condensed Matter;Jul2003, Vol. 34 Issue 1, p3 

    Our recent experiments show that arrays of underdamped Josephson junctions radiate coherently only above a threshold number of junctions switched onto the radiating state. For each junction, the radiating state is a resonant step in the current-voltage characteristics due to the interaction...

  • Fractional ac Josephson effect in p- and d-wave superconductors. Kwon, H.-J.; Sengupta, K.; Yakovenko, V. M. // European Physical Journal B -- Condensed Matter;Feb2004, Vol. 37 Issue 3, p349 

    Presents the results of a study on the fractional alternating current (ac) effect in p- and d-wave superconductors. Information on the fractional frequency of the ac Josephson current; Relationship between the Josephson current and the first power of the electron tunneling amplitude; Use of the...

  • On the 50th anniversary of the Josephson effects. Balkashin, O. P. // Low Temperature Physics;Apr2012, Vol. 38 Issue 4, p259 

    No abstract available.

  • Metal Oxide Bicrystal Josephson Junctions of a New Type with High Critical Parameters. Kotelyanskiî, I. M.; Borisenko, I. V.; Shadrin, A. V.; Ovsyannikov, G. A.; Luzanov, V. A.; Komissinskiî, F. V. // Technical Physics Letters;Mar2005, Vol. 31 Issue 3, p189 

    Film bicrystal Josephson junctions of a new type based on a metal oxide high-Tc superconductor of the YBa2Cu3O7 – x (YBCO) system are suggested and studied. In junctions of the new type, in contrast to the known ones, the working surfaces situated on the opposite sides of the bicrystal...

  • Charge and spin currents in a ballistic SNS Josephson junction between p-wave superconductors. Rashedi, G.; Rahnavard, Y.; Kolesnichenko, Yu. A. // Low Temperature Physics;Mar2010, Vol. 36 Issue 3, p205 

    The charge and spin transport properties of a clean TS–N–TS Josephson junction (triplet superconductor-normal metal-triplet superconductor) are studied using the quasiclassical Eilenberger equation for the Green’s function. The effects of the thickness of normal layer...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics