Pseudogap and Other Precursor Signatures in the Systems with Local Fermion Pairs

• Authors: T. Domański
• Languages of publication: EN

Abstracts

EN

We consider precursor effects of the superconducting order which possibly show up in the normal state of high temperature superconducting materials. The local pairs of electrons or holes are formed there well above the transition temperature T_c. Due to strong quantum fluctuations the single particle density of states can be partly depleted near the Fermi energy leading to the pseudogap. We claim that this feature should go hand in hand with emergence of the Bogoliubov-type quasiparticles. In the normal state they are expected to be damped and acquire the long lifetime upon passing T_c. These Bogoliubov-type quasiparticles may nevertheless become correlated on a finite spatial and temporal scale. We discuss how such short-range pair correlations can be detected experimentally.

Keywords

EN

74.20.Mn; 71.10.Li; 03.75.Kk

Discipline

• 03.75.Kk: Dynamic properties of condensates; collective and hydrodynamic excitations, superfluid flow
• 71.10.Li: Excited states and pairing interactions in model systems
• 74.20.Mn: Nonconventional mechanisms

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2004
• Volume: 106
• Issue: 5
• Pages: 553-560

Dates

published

2004-11

received

2004-06-06

Contributors

author

T. Domański

• Institute of Physics, M. Curie Skłodowska University, pl. M. Curie-Skłodowskiej 1, 20-031 Lublin, Poland

References

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Identifiers

DOI

10.12693/APhysPolA.106.553