Hybrid high-temperature superconductor-semiconductor tunnel diode

Abstract

We report the demonstration of hybrid high-Tc-superconductor-semiconductor tunnel junctions, enabling new interdisciplinary directions in condensed matter research. The devices were fabricated by our newly-developed mechanical bonding technique, resulting in high-Tc-semiconductor planar junctions acting as superconducting tunnel diodes. Tunneling-spectra characterization of the hybrid junctions of Bi2Sr2CaCu2O8+δ combined with bulk GaAs, or a GaAs/AlGaAs quantum well, exhibits excess voltage and nonlinearity - in good agreement with theoretical predictions for a d-wave superconductor-normal material junction, and similar to spectra obtained in scanning tunneling microscopy. Additional junctions are demonstrated using Bi2Sr2CaCu2O8+δ combined with graphite or Bi2Te3. Our results pave the way for new methods in unconventional superconductivity studies, novel materials and quantum technology applications.

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Cited by in corpus (6)

• Cooper-pair based photon entanglement without isolated emitters
• Transport across a junction of topological insulators and a superconductor
• Shedding light on topological superconductors
• Evidence for a New Excitation at the Interface Between a High-Tc Superconductor and a Topological Insulator
• Modeling Tunneling for the Unconventional Superconducting Proximity Effect
• Optical stabilization of voltage fluctuations in half-Josephson lasers