Observation of Andreev bound states in bicrystal grain-boundary Josephson junctions of the electron-doped superconductor La2-xCexCuO4-y

Chesca B, Seifried M, Dahm T, Schopohl N, Koelle D, Kleiner R, Tsukada A (2005)
Physical Review B 71(10): 104504.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Autor*in
Chesca, B; Seifried, M; Dahm, ThomasUniBi; Schopohl, N; Koelle, D; Kleiner, R; Tsukada, A
Abstract / Bemerkung
We observe a zero-bias conductance peak (ZBCP) in the ab-plane quasiparticle tunneling spectra of thin film grain-boundary Josephson junctions made of the electron-doped cuprate superconductor La2-xCexCuO4-y. An applied magnetic field reduces the spectral weight around zero energy and shifts it nonlinearly to higher energies consistent with a Doppler shift of the Andreev bound states (ABS) energy. For all magnetic fields the ZBCP appears simultaneously with the onset of superconductivity. These observations strongly suggest that the ZBCP results from the formation of ABS at the junction interfaces, and, consequently, that there is a sign change in the symmetry of the superconducting order parameter of this compound consistent with a d-wave symmetry.
Erscheinungsjahr
2005
Zeitschriftentitel
Physical Review B
Band
71
Ausgabe
10
Art.-Nr.
104504
ISSN
1098-0121
eISSN
1550-235X
Page URI
https://pub.uni-bielefeld.de/record/2330136

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Chesca B, Seifried M, Dahm T, et al. Observation of Andreev bound states in bicrystal grain-boundary Josephson junctions of the electron-doped superconductor La2-xCexCuO4-y. Physical Review B. 2005;71(10): 104504.
Chesca, B., Seifried, M., Dahm, T., Schopohl, N., Koelle, D., Kleiner, R., & Tsukada, A. (2005). Observation of Andreev bound states in bicrystal grain-boundary Josephson junctions of the electron-doped superconductor La2-xCexCuO4-y. Physical Review B, 71(10), 104504. https://doi.org/10.1103/PhysRevB.71.104504
Chesca, B., Seifried, M., Dahm, T., Schopohl, N., Koelle, D., Kleiner, R., and Tsukada, A. (2005). Observation of Andreev bound states in bicrystal grain-boundary Josephson junctions of the electron-doped superconductor La2-xCexCuO4-y. Physical Review B 71:104504.
Chesca, B., et al., 2005. Observation of Andreev bound states in bicrystal grain-boundary Josephson junctions of the electron-doped superconductor La2-xCexCuO4-y. Physical Review B, 71(10): 104504.
B. Chesca, et al., “Observation of Andreev bound states in bicrystal grain-boundary Josephson junctions of the electron-doped superconductor La2-xCexCuO4-y”, Physical Review B, vol. 71, 2005, : 104504.
Chesca, B., Seifried, M., Dahm, T., Schopohl, N., Koelle, D., Kleiner, R., Tsukada, A.: Observation of Andreev bound states in bicrystal grain-boundary Josephson junctions of the electron-doped superconductor La2-xCexCuO4-y. Physical Review B. 71, : 104504 (2005).
Chesca, B, Seifried, M, Dahm, Thomas, Schopohl, N, Koelle, D, Kleiner, R, and Tsukada, A. “Observation of Andreev bound states in bicrystal grain-boundary Josephson junctions of the electron-doped superconductor La2-xCexCuO4-y”. Physical Review B 71.10 (2005): 104504.

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