09:00 〜 09:15
▲ [17a-Z19-1] External magnetic field dependent current in a single-electron transistor using Pd nanogap electrodes and an Au nanoparticle
キーワード：Single-electron transistor using, Au nanoparticle, paramagnetic material
Spin-dependent single-electron tunneling, which is based on interplay between single-electron changing effect and tunnel magnetoresistance (TMR) effect, has attracted much attention owing to its unique phenomena such as the enhancement and the oscillation of TMR. These phenomena have been observed in ferromagnetic tunnel junctions and ferromagnetic granular structures.
Recently, we have reported a chemically-assembled single-electron transistor (SET) using Pt-based nanogap electrodes and an Au nanoparticle, which showed clear and ideal Coulomb diamonds. To realize the chemically-assembled SET, robust Pt-based nanogap electrodes with a 10-nm-scale ultrafine linewidth were fabricated by electron-beam lithography (EBL) and electron-beam (EB) evaporation, and an alkanethiol-protected Au nanoparticle was chemisorbed between the gap using alkanedithiol self-assembled monolayer (SAM). This SET structure consisting of paramagnetic source/tunnel barrier/metallic Coulomb island/tunnel barrier/paramagnetic drain, as double barrier magnetic tunnel junctions, could be utilized to study spin-dependent single-electron tunneling when an external magnetic field is applied.
Here, we demonstrate external magnetic field dependent current in a chemically-assembled SET based on Pd nanogap electrodes and an Au nanoparticle.
This study was partially supported by MEXT Elements Strategy Initiative to Form Core Research Center (Grant No. JPMXP0112101001).
Recently, we have reported a chemically-assembled single-electron transistor (SET) using Pt-based nanogap electrodes and an Au nanoparticle, which showed clear and ideal Coulomb diamonds. To realize the chemically-assembled SET, robust Pt-based nanogap electrodes with a 10-nm-scale ultrafine linewidth were fabricated by electron-beam lithography (EBL) and electron-beam (EB) evaporation, and an alkanethiol-protected Au nanoparticle was chemisorbed between the gap using alkanedithiol self-assembled monolayer (SAM). This SET structure consisting of paramagnetic source/tunnel barrier/metallic Coulomb island/tunnel barrier/paramagnetic drain, as double barrier magnetic tunnel junctions, could be utilized to study spin-dependent single-electron tunneling when an external magnetic field is applied.
Here, we demonstrate external magnetic field dependent current in a chemically-assembled SET based on Pd nanogap electrodes and an Au nanoparticle.
This study was partially supported by MEXT Elements Strategy Initiative to Form Core Research Center (Grant No. JPMXP0112101001).