Institute for Complex Systems - Sapienza - CNR

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ISC Sapienza Superconductivity


Research on superconducting mechanisms and physical properties of superconductors and related materials.


Inhomogeneities in Cuprates

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If the mechanism of high-Tc superconductivity is electronic, to understand the electronic excitation spectrum is as important as to understand phonons was important to develop BCS theory. In this regard charge and spin inhomogeneous states, often found in strongly correlated systems, are interesting because they can support new collective modes, “electronic phonons”, that would not be present in a weakly interacting fluid.

Last Updated on Thursday, 07 April 2011 21:11

Unconventional electron-phonon interaction and nonadiabatic effects

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The conventional understanding of the electron-phonon phenomenology in condensed matter strongly relies on the adiabatic assumption, i.e. that nuclei dynamics is much slower than the electron one. In solid crystals the validity of this assumption is usually related to the comparison

Last Updated on Thursday, 03 March 2011 11:05

Competing orders in Iron based superconductors

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In January 2008 a new family of superconductors has been discovered with FeAs layers. Iron is a magnetic ion and in traditional superconductors small amounts of magnetic impurities kill superconductivity so an iron based superconductor is at first sight surprising.

Last Updated on Tuesday, 05 February 2013 12:34

Strongly Correlated Superconductivity: how can repulsion enhance Tc?

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In conventional superconductors, the repulsive interaction between electrons opposes to phonon-mediated pairing. We have shown that even phonon-mediated superconductivity can be favoured by repulsion under suitable conditions which are realized in fullerenes.

Last Updated on Tuesday, 08 February 2011 11:50