Publication

Window-type tunnel devices on YBa2Cu3O7-x thin films

Davor Pavuna
1991
Conference Papers

Abstract

The authors present the first YBa2Cu3O7-x-Pb tunnelling measurements using window-type tunnel devices. YBa2Cu3O7-x (YBCO) thin films are grown in-situ by dual Ar+ ion beam sputtering. Tunnel barriers are formed on a chemically etched YBCO surface. Tunnelling dV/dI(V) characteristics show reproducible weak gap-like structure 4.4±0.4 meV and 22±2 meV, the latter giving a 2Δ/kBTc value of about 6.5

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Davor Pavuna
1991
Conference Papers

Abstract

Official source

Related concepts (7)

Thin film

A thin film is a layer of material ranging from fractions of a nanometer (monolayer) to several micrometers in thickness. The controlled synthesis of materials as thin films (a process referred to as deposition) is a fundamental step in many applications. A familiar example is the household mirror, which typically has a thin metal coating on the back of a sheet of glass to form a reflective interface. The process of silvering was once commonly used to produce mirrors, while more recently the metal layer is deposited using techniques such as sputtering.

Thin-film solar cell

Thin-film solar cells are made by depositing one or more thin layers (thin films or TFs) of photovoltaic material onto a substrate, such as glass, plastic or metal. Thin-film solar cells are typically a few nanometers (nm) to a few microns (μm) thick–much thinner than the wafers used in conventional crystalline silicon (c-Si) based solar cells, which can be up to 200 μm thick. Thin-film solar cells are commercially used in several technologies, including cadmium telluride (CdTe), copper indium gallium diselenide (CIGS), and amorphous thin-film silicon (a-Si, TF-Si).

Quantum tunnelling

In physics, quantum tunnelling, barrier penetration, or simply tunnelling is a quantum mechanical phenomenon in which an object such as an electron or atom passes through a potential energy barrier that, according to classical mechanics, the object does not have sufficient energy to enter or surmount. Tunneling is a consequence of the wave nature of matter, where the quantum wave function describes the state of a particle or other physical system, and wave equations such as the Schrödinger equation describe their behavior.