Local gate control of a carbon nanotube double quantum dot.

g-tensor control in bent carbon nanotube quantum dots

We demonstrate gate control of the electronic g tensor in single and double quantum dots formed along a bend in a carbon nanotube. From the dependence of the single-dot excitation spectrum on magnetic field magnitude and direction, we extract spin-orbit coupling, valley coupling, and spin and orbital magnetic moments. Gate control of the g tensor is measured using the splitting of the Kondo pea...

Control of Single-Hole Transition in Carbon Nanotube Transistor with Quantum Dot in Gate Insulator at Room Temperature

Tunable few-electron double quantum dots and Klein tunnelling in ultraclean carbon nanotubes.

Quantum dots defined in carbon nanotubes are a platform for both basic scientific studies and research into new device applications. In particular, they have unique properties that make them attractive for studying the coherent properties of single-electron spins. To perform such experiments it is necessary to confine a single electron in a quantum dot with highly tunable barriers, but disorder...

Quantum dots in carbon nanotubes

In this overview paper, we present low-temperature electronic transport measurements of carbon nanotube quantum dots with a back gate. In a semiconducting tube, charge carriers could be completely depleted. The addition energy and the excitation spectrum have been studied as a function of the number of charges (electrons or holes), one by one. We observe electron–hole symmetry, which is a direc...

Singlet–triplet physics and shell filling in carbon nanotube double quantum dots

An artificial two-atomic molecule, also called a double quantum dot (DQD), is an ideal system for exploring few-electron physics. Interactions between just two electrons have been explored in such systems using the singlet and triplet states as the two states in a quantum two-level system. An alternative and attractive material for studying spin-based two-level systems is the carbon nanotube (C...