Publication

Study of Iodine-Intercalated Bi2Sr2CaCu2Oy Single-Crystals

Giorgio Margaritondo, Helmuth Berger
1994
Journal Articles

Abstract

Iodine intercalation in Bi2Sr2CaCu2Oy crystals enables one to modify the critical temperature, T(c), of the superconducting phase, and to obtain a semiconductor phase. This doping drastically changes the size of the unit cell. A photoemission spectroscopy study enables us to see that the decrease of the critical temperature is not related only to the change in the c-axis lattice parameter, but also to an over-doping of copper planes (hole doping).

Official source

https://infoscience.epfl.ch/entities/publication/c4164331-71da-44f8-bf2a-ea3e6f724b39

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Giorgio Margaritondo, Helmuth Berger
1994
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/c4164331-71da-44f8-bf2a-ea3e6f724b39

About this result

Related concepts (32)

Doping (semiconductor)

In semiconductor production, doping is the intentional introduction of impurities into an intrinsic semiconductor for the purpose of modulating its electrical, optical and structural properties. The doped material is referred to as an extrinsic semiconductor. Small numbers of dopant atoms can change the ability of a semiconductor to conduct electricity. When on the order of one dopant atom is added per 100 million atoms, the doping is said to be low or light.

Semiconductor

A semiconductor is a material which has an electrical conductivity value falling between that of a conductor, such as copper, and an insulator, such as glass. Its resistivity falls as its temperature rises; metals behave in the opposite way. Its conducting properties may be altered in useful ways by introducing impurities ("doping") into the crystal structure. When two differently doped regions exist in the same crystal, a semiconductor junction is created.

Superconductivity

Superconductivity is a set of physical properties observed in certain materials where electrical resistance vanishes and magnetic fields are expelled from the material. Any material exhibiting these properties is a superconductor. Unlike an ordinary metallic conductor, whose resistance decreases gradually as its temperature is lowered, even down to near absolute zero, a superconductor has a characteristic critical temperature below which the resistance drops abruptly to zero.

Related publications (11)

Study of Iodine-Intercalated Bi2Sr2CaCu2Oy Single-Crystals

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Temperature effects in (photo)electrochemical devices for solar fuels and chemicals production

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