Physical Review B, volume 72, issue 18, publication number 184510

Bound states at the interface between antiferromagnets and superconductors

Publication typeJournal Article
Publication date2005-11-16
Quartile SCImago
Q1
Quartile WOS
Q2
Impact factor3.7
ISSN24699950, 24699969, 10980121, 1550235X
Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Abstract
We present a detailed theoretical investigation of interfaces and junctions involving itinerant antiferromagnets. By solving the Bogoliubov--de Gennes equations with a tight-binding model on a square lattice, we study both the self-consistent order parameter fields proximate to interfaces between antiferromagnets (AF) and $s$-wave (sSC) or $d$-wave (dSC) superconductors, the dispersion of quasiparticle subgap states at interfaces and interlayers, and the local density of states (LDOS) as a function of distance from the interface. In addition, we present the quasiclassical approach to interfaces and junctions involving itinerant antiferromagnets developed in an earlier paper. Analytical results are in excellent agreement with what we obtain numerically. Strong effects of pair breaking in the presence of low-energy interface Andreev states are found in particular for AF/sSC interfaces when interface potentials are not too high. Potential barriers induce additional extrema in the dispersive quasiparticle spectra with corresponding peaks in the LDOS. Discrete quasiparticle dispersive levels in AF--normal metal $(N)$--AF systems are found to depend strongly on the misorientation angle of the magnetizations in the two antiferromagnets.

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ANDERSEN B. L. et al. Bound states at the interface between antiferromagnets and superconductors // Physical Review B. 2005. Vol. 72. No. 18. 184510
GOST all authors (up to 50) Copy
ANDERSEN B. L., Bobkova I., Hirschfeld P., BARASH Y. S. Bound states at the interface between antiferromagnets and superconductors // Physical Review B. 2005. Vol. 72. No. 18. 184510
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RIS Copy
TY - JOUR
DO - 10.1103/PhysRevB.72.184510
UR - https://doi.org/10.1103/PhysRevB.72.184510
TI - Bound states at the interface between antiferromagnets and superconductors
T2 - Physical Review B
AU - ANDERSEN, BRIAN L.
AU - Bobkova, I. V.
AU - Hirschfeld, P.J.
AU - BARASH, YU. S.
PY - 2005
DA - 2005/11/16
PB - American Physical Society (APS)
IS - 18
VL - 72
SN - 2469-9950
SN - 2469-9969
SN - 1098-0121
SN - 1550-235X
ER -
BibTex
Cite this
BibTex Copy
@article{2005_ANDERSEN,
author = {BRIAN L. ANDERSEN and I. V. Bobkova and P.J. Hirschfeld and YU. S. BARASH},
title = {Bound states at the interface between antiferromagnets and superconductors},
journal = {Physical Review B},
year = {2005},
volume = {72},
publisher = {American Physical Society (APS)},
month = {nov},
url = {https://doi.org/10.1103/PhysRevB.72.184510},
number = {18},
doi = {10.1103/PhysRevB.72.184510}
}
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