title: Pauli Spin Blockade of Heavy Holes in a Silicon Double Quantum Dot.
abstract: In this work, we study hole transport in a planar silicon metal-oxide-semiconductor based double quantum dot. We demonstrate Pauli spin blockade in the few hole regime and map the spin relaxation induced leakage current as a function of interdot level spacing and magnetic field. With varied interdot tunnel coupling, we can identify different dominant spin relaxation mechanisms. Application of a strong out-of-plane magnetic field causes an avoided singlet-triplet level crossing, from which the heavy hole g-factor ~0.93 and the strength of spin-orbit interaction ~110 μeV can be obtained. The demonstrated strong spin-orbit interaction of heavy holes promises fast local spin manipulation using only electric fields, which is of great interest for quantum information processing.
authors.affiliation: School of Physics, ‡Australian National Fabrication Facility, and §Centre of Excellence for Quantum Computation and Communication Technology, School of Electrical Engineering and Telecommunications, University of New South Wales , Sydney, New South Wales 2052, Australia.
authors.forename: Ruoyu
authors.initials: R
authors.lastname: Li
authors.affiliation: School of Physics, ‡Australian National Fabrication Facility, and §Centre of Excellence for Quantum Computation and Communication Technology, School of Electrical Engineering and Telecommunications, University of New South Wales , Sydney, New South Wales 2052, Australia.
authors.forename: Fay E
authors.initials: FE
authors.lastname: Hudson
authors.affiliation: School of Physics, ‡Australian National Fabrication Facility, and §Centre of Excellence for Quantum Computation and Communication Technology, School of Electrical Engineering and Telecommunications, University of New South Wales , Sydney, New South Wales 2052, Australia.
authors.forename: Andrew S
authors.initials: AS
authors.lastname: Dzurak
authors.affiliation: School of Physics, ‡Australian National Fabrication Facility, and §Centre of Excellence for Quantum Computation and Communication Technology, School of Electrical Engineering and Telecommunications, University of New South Wales , Sydney, New South Wales 2052, Australia.
authors.forename: Alexander R
authors.initials: AR
authors.lastname: Hamilton
keywords: Pauli spin blockade; Silicon; heavy hole; quantum dot; spin−orbit interaction