Concept

Cooper pair

Related publications (106)

Vortex dynamics in two-dimensional Josephson junction arrays

The dynamic response of two-dimensional Josephson junction arrays close to, but above the Berezinskii-Kosterlitz-Thouless (BKT) transition temperature is described in terms of the vortex dielectric function ε(ω) and the flux noise spectrum S φ (ω). They ar ...

American Physical Society2003

Advances in the understanding of the structure and physical properties of the cyclic radical F3CCSNSCCF3 (1) and related room temperature paramagnetic liquids

At room temp. (1) is a green paramagnetic liq. under a blue gas, that freezes to a black diamagnetic solid, which consists of tetramers of (1). The enthalpy of fusion, vaporization and sublimation are similar to those expected for a diamagnetic material, i ...

2002

Quasiparticle scattering processes in a model Fermi liquid: 1T-TiTe2

Giorgio Margaritondo, Marco Grioni, Helmuth Berger, Luca Perfetti

We performed angle-resolved photoelectron spectroscopy (ARPES) and resistivity measurements on the layered metal 1T-TiTe2. We determined the quasiparticle dispersion and lifetime. In particular, we could characterize and separately evaluate the effects of ...

2002

Luminescence of Exchange Coupled Pairs of Transition Metal Ions

Sylvie Roke

The influence of exchange interaction between paramagnetic ions on the luminescence properties is investigated for and pairs. Two effects are reported: shortening of the lifetime of the spin-forbidden emission and a shift of emission lines or bands to a lo ...

2001

High-resolution angle-resolved photoemission investigation of the quasiparticle scattering processes in a model Fermi liquid: 1T-TiTe2

Giorgio Margaritondo, László Forró, Marco Grioni, Richard Gaal, Helmuth Berger, Luca Perfetti

We present a combined angle-resolved photoemission spectroscopy and resistivity study of the model Fermi liquid system 1T-TiTe2. From the analysis of the quasiparticle spectral line shape we identify and separately evaluate the electron-electron. electron- ...

2001

Nucleation and growth of supported clusters at defect sites: Pd/MgO(001)

Klaus Kern, Harald Brune

Nucleation and growth of Pd on cleaved MgO(001) surfaces were studied by variable-temperature atomic force microscopy in the temperature range 200-800 K. Constant island densities (similar to 3x10(12)cm(-2)) were observed over a wide temperature range, ind ...

2000

One-electron spectral functions of the attractive Hubbard model at intermediate coupling

Massimiliano Capezzali

We calculate the one-electron spectral function of the attractive-U Hubbard model in two dimensions. We work in the intermediate coupling and low-density regime and evaluate analytically the self energy. The results are obtained in a framework based on the ...

Elsevier2000

Spectroscopic signatures of defect-induced pair breaking in Bi2Sr2CaCu2O8+x

Giorgio Margaritondo, László Forró, Marco Grioni, Davor Pavuna, Helmuth Berger

We investigated the effect of disorder on the spectral properties of the high temperature superconductor Bi2Sr2CaCu2O8+x. We find that small defect densities, in the low 10(-3) range, already suppress the characteristic spectral signature of the supercondu ...

1999

Relaxation time of the Cooper pairs near T-c in cuprate superconductors

Davor Pavuna

It is first shown that the thermal fluctuation effects on the transport and on the thermodynamic observables above the superconducting transition may provide, when they are analyzed simultaneously and consistently, a powerful tool to access the relaxation ...

1999

Charge density wave and quantum fluctuations in a molecular crystal

Nicolas Macris

We consider an electron-phonon system in two and three dimensions on square, hexagonal, and cubic lattices. The model is a modification of the standard Holstein model where the optical branch is appropriately curved in order to have a reflection positive H ...

1999

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