Asymmetric Tunneling Conductance in Doped Antiferromagnets

Maciąg, A; Wróbel, P

doi:10.12693/APhysPolA.109.607

Journal

Acta Physica Polonica A

2006 | 109 | 4-5 | 607-610

Article title

Asymmetric Tunneling Conductance in Doped Antiferromagnets

Authors

A Maciąg , P Wróbel

Content

Full texts:

http://przyrbwn.icm.edu.pl/APP/PDF/109/a109z426.pdf [remote]

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Abstracts

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

71.10.Fd 74.20.Mn 74.25.Fy

Discipline

Publisher

Institute of Physics, Polish Academy of Sciences

Journal

Acta Physica Polonica A

Year

2006

Volume

109

Issue

4-5

Pages

607-610

Physical description

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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2. P.W. Anderson, N.P. Ong, cond-mat/0405518
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4. M. Randeria, R. Sensarma, N. Trivedi, F.-C. Zhang, cond-mat/0412096
5. P. Wróbel, R. Eder, Phys. Rev. B, 58, 15160, 1998
6. P. Wróbel, R. Eder, R. Micnas, J. Phys. Condens. Matter, 15, 2755, 2003
7. M.H. Cohen, L.M. Falicov, J.C. Phillips, Phys. Rev. Lett., 8, 216, 1962
8. P. Wróbel, A. Maciag, R. Eder, P. Fulde, R. Micnas, Acta Phys. Pol. A, 106, 575, 2004
9. G.D. Mahan, in: Many-Particle Physic, Plenum Press, New York 1990, p. 788

Document Type

Publication order reference

Identifiers

DOI

10.12693/APhysPolA.109.607

YADDA identifier

bwmeta1.element.bwnjournal-article-appv109n426kz