Thermopower oscillation symmetries in a double-loop Andreev interferometer

P. Cadden-Zimansky*, Z. Jiang, Venkat Chandrasekhar

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Andreev interferometers, normal metal wires coupled to superconducting loops, display phase coherent changes as the magnetic flux through the superconducting loops is altered. Properties such as the electronic and thermal conductance of these devices have been shown to oscillate symmetrically about zero flux with a period equal to one superconducting flux quantum, Φ0 = h / 2 e. However, the thermopower of these devices can oscillate symmetrically or antisymmetrically depending on the geometry of the sample, a phenomenon not well understood theoretically. Here we report on thermopower measurements of a double-loop Andreev interferometer where two Josephson currents in the normal metal wire may be controlled independently. The amplitude and symmetries of the observed thermopower oscillations may help to illuminate the unexplained dependence of oscillation symmetry on sample geometry.

Original languageEnglish (US)
Pages (from-to)155-159
Number of pages5
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Volume40
Issue number1
DOIs
StatePublished - Oct 1 2007

Keywords

  • Andreev interferometer
  • Quantum coherence
  • Superconductivity

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Thermopower oscillation symmetries in a double-loop Andreev interferometer'. Together they form a unique fingerprint.

Cite this