The resonant amplification of the superconducting critical temperature, the isotope effect, the change of the chemical potential in a particular 2D striped phase formed by superconducting stripes of width L alternated by separating stripes of width W with a period λp at the atomic limit is studied. The critical temperature shows a `shape resonance' by tuning the charge density where the chemical potential μ is in the range En<μ<En+ℏω0, where En is the bottom of the nth superlattice subband for n>2, and ℏω0 is the energy cutoff for the pairing interaction. The maximum critical superconducting temperature is reached at the cross-over from 2D to 1D behavior. The particular properties of this electronic phase and its similarities with the normal and superconducting properties of doped cuprate perovskites are discussed.
Superconductivity of a striped phase at the atomic limit
PERALI, Andrea;
1998-01-01
Abstract
The resonant amplification of the superconducting critical temperature, the isotope effect, the change of the chemical potential in a particular 2D striped phase formed by superconducting stripes of width L alternated by separating stripes of width W with a period λp at the atomic limit is studied. The critical temperature shows a `shape resonance' by tuning the charge density where the chemical potential μ is in the range En<μI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.