Asymmetric Tunneling Conductance in Doped Antiferromagnets

• Authors: A Maciąg , P Wróbel
• Languages of publication: EN

Abstracts

EN

We calculate the tunneling conductance in the framework of the spin polaron model, which is an effective model for the t-J model, in the limit where at least short-range antiferromagnetic correlations exist. We show that both in the normal state and in the superconducting state the asymmetry of tunneling conductance is present. This fact is the implication of the particle-hole asymmetry of the spin polaron Hamiltonian in the limit of low density of spin polarons which are quasiparticles emerging in a hole doped antiferromagnet. Experimental evidence of analogous asymmetric tunneling conductance was found in the tunneling spectroscopy measurements of high T_c superconductors.

Keywords

EN

71.10.Fd; 74.20.Mn; 74.25.Fy

Discipline

• 74.20.Mn: Nonconventional mechanisms
• 71.10.Fd: Lattice fermion models (Hubbard model, etc.)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2006
• Volume: 109
• Issue: 4-5
• Pages: 607-610

Dates

published

2006-04

received

2005-09-25

Contributors

author

A Maciąg

• Institute for Low Temperature and Structure Research, P.O. Box 1410, 50-950 Wrocław 2, Poland

author

P Wróbel

• Institute for Low Temperature and Structure Research, P.O. Box 1410, 50-950 Wrocław 2, Poland

References

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Identifiers

DOI

10.12693/APhysPolA.109.607