Publication

Properties of alloyed AuGeNi-contacts on GaAs/Ga/AlAs-heterostructures

Romuald Houdré, Marc Ilegems, Marcel Py
1991
Journal Articles

Abstract

A reproducible and robust techique of contacting GaAs/GaAlAs heterostructures using an evaporated AuGeNi alloy has been developed. The behavior of the electrical contacts to the two-dimensional electron gas has been studied in the quantum Hall regime. Contact resistance values of typically 10-50 m-OMEGA are obtained which are stable with time and thermal cycling. This type of contact is therefore well suited to be used for precision measurements of the quantized Hall resistance.

Official source

https://infoscience.epfl.ch/entities/publication/ea76b684-2ad0-466e-8300-4ec0feff1dd7

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Romuald Houdré, Marc Ilegems, Marcel Py
1991
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/ea76b684-2ad0-466e-8300-4ec0feff1dd7

About this result

Related concepts (25)

Contact resistance

The term contact resistance refers to the contribution to the total resistance of a system which can be attributed to the contacting interfaces of electrical leads and connections as opposed to the intrinsic resistance. This effect is described by the term electrical contact resistance (ECR) and arises as the result of the limited areas of true contact at an interface and the presence of resistive surface films or oxide layers. ECR may vary with time, most often decreasing, in a process known as resistance creep.

Free electron model

In solid-state physics, the free electron model is a quantum mechanical model for the behaviour of charge carriers in a metallic solid. It was developed in 1927, principally by Arnold Sommerfeld, who combined the classical Drude model with quantum mechanical Fermi–Dirac statistics and hence it is also known as the Drude–Sommerfeld model.

Two-dimensional electron gas

A two-dimensional electron gas (2DEG) is a scientific model in solid-state physics. It is an electron gas that is free to move in two dimensions, but tightly confined in the third. This tight confinement leads to quantized energy levels for motion in the third direction, which can then be ignored for most problems. Thus the electrons appear to be a 2D sheet embedded in a 3D world. The analogous construct of holes is called a two-dimensional hole gas (2DHG), and such systems have many useful and interesting properties.

Related publications (2)

Properties of alloyed AuGeNi-contacts on GaAs/Ga/AlAs-heterostructures

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