Unusual giant magnetoresistance effect in heterojunction structure of ultra-thin single-crystal Pb film on silicon substrate

Abstract

Superconductor films on semiconductor substrates draw much attention recently since the derived superconductor-based electronics have been shown promising for future data process and storage technologies. By growing atomically uniform single-crystal epitaxial Pb films of several nanometers thick on Si wafers to form a sharp superconductor-semiconductor heterojunction, we have obtained an unusual giant magnetoresistance effect when the Pb film is superconducting. In addition to the great fundamental interest of this effect, the simple structure and compatibility and scalability with current Si-based semiconductor technology offer a great opportunity for integrating superconducting circuits and detectors in a single chip.

14 pages, 3 figures. submitted to APL

References in corpus (7)

• Hard Superconductivity of a Soft Metal in the Quantum Regime
• Manipulating spin and charge in magnetic semiconductors usingsuperconducting vortices
• Quantum size effects on the perpendicular upper critical field in ultra-thin lead films
• Andreev reflection at high magnetic fields: Evidence for electron and hole transport in edge states
• Anomalous Parallel Field Negative Magnetoresistance in Ultrathin Films Near the Superconductor-Insulator Transition
• Coherent transport in Nb/delta-doped-GaAs hybrid microstructures
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Cited by in corpus (4)

• Proximity-induced superconductivity in nanowires: Mini-gap state and differential magnetoresistance oscillations
• General framework for transport in spin-orbit-coupled superconducting heterostructures: Nonuniform spin-orbit coupling and spin-orbit-active interfaces
• Superconductivity in single crystalline Pb nanowires contacted by normal metal electrodes
• Electronic transport properties of topological insulator films and low dimensional superconductors