Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
Alternating dynamic state self-generated by internal resonance in stacks of intrinsic Josephson junctions
 

Summary: Alternating dynamic state self-generated by internal resonance
in stacks of intrinsic Josephson junctions
A. E. Koshelev
Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
Received 1 April 2008; revised manuscript received 10 October 2008; published 7 November 2008
Intrinsic Josephson-junction stacks realized in high-temperature superconductors provide a very attractive
base for developing coherent sources of electromagnetic radiation in the terahertz frequency range. A promis-
ing way to synchronize phase oscillations in all the junctions is to excite an internal cavity resonance. We
demonstrate that this resonance promotes the formation of an alternating coherent state, in which the system
spontaneously splits into two subsystems with different phase-oscillation patterns. There is a static phase shift
between the oscillations in the two subsystems, which changes from 0 to 2 in a narrow region near the stack
center. The oscillating electric and magnetic fields are almost homogeneous in all the junctions. The formation
of this state promotes efficient pumping of the energy into the cavity resonance leading to strong resonance
features in the current-voltage dependence.
DOI: 10.1103/PhysRevB.78.174509 PACS number s : 74.50. r, 74.81.Fa, 85.25.Cp, 74.72.Hs
I. INTRODUCTION
High-temperature layered superconductors, such as
Bi2Sr2CaCu2O8 BSCCO , are composed of two-dimensional
superconducting CuO2 layers coupled via the Josephson
effect.1

  

Source: Alexei, Koshelev - Materials Science Division, Argonne National Laboratory

 

Collections: Materials Science; Physics