quantum point contact – TechConnect Briefs

Spin Density Functional Theory Simulations of Quantum Point Contacts: An Investigation of Spin Filtering Effects

Akis R., Ferry D.K., Arizona State University, US

We present simulations of quantum wires and quantum point contacts (QPCs) formed in semiconductor heterostructures. Conductance measurements for such structures is quantized with plateaus at integer multiples of G_0= (2e^2/h) as function of gate voltage, [...]

The Quantum-Point-Contact Spin Filter

Gilbert M.J., Bird J.P., Arizona State University, US

We describe an electron filter that exploits the known transmission properties of quantum point contacts to allow local and tunable control of the spin polarization in a semiconductor. When properly configured, the conductance of this [...]