Superconductivity in a two-dimensional electron gas

Article Abstract:

Kravchenko and colleagues recently observed that a two-dimensional electron gas in zero magnetic field can become conducting at low temperatures. Conventional theories preclude the existences of a metallic state at zero temperature in two dimensions. There are several experiments that confirm the existence of a new conducting phase. It is now argued that such as phase is actually a superconductor with an inhomogeneous charge density.

Observations, Magnetic fields

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Spin correlations in the electron-doped high-transition-temperature superconductor N[d.sub.2-x][Ce.sub.x]Cu[O.sub.4(plusmn)[delta]]

Article Abstract:

Inelastic magnetic neutron-scattering measurements report the distinct possibility that genuine long-range antiferromagnetism and superconductivity do not coexist. The data reveal a magnetic quantum critical point where superconductivity first appears, consistent with an exotic quantum phase transition between the two phases.

Science & research, Measurement, Neutrons, Neutron scattering

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From insulator to superconductor

Article Abstract:

The discovery of a new family of superconductors is reported that are insulating organic molecular crystals made metallic via charge injection.

Organic superconductors

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