RVB superconductors and tunnel junctions
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RVB superconductors and tunnel junctions. / Flensberg, Karsten; Hedegård, Per.
I: Physica C: Superconductivity and its Applications, Bind 160, Nr. 1, 15.08.1989, s. 89-101.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - RVB superconductors and tunnel junctions
AU - Flensberg, Karsten
AU - Hedegård, Per
PY - 1989/8/15
Y1 - 1989/8/15
N2 - We discuss the consequences of an RVB state modelled with independent charge and spin carriers (holons and spinons, respectively), focusing on the superconducting state. The current-voltage characteristic for a tunnel junction with RVB superconductors on one side of the junction is calculated. We consider different contributions to the current through the junction: quasiparticle current, Andreev current, and Josephson current. We show that the extra degrees of freedom present in the RVB state explain the non-linear quasiparticle characteristics and the low relative Andreev signal. However, in the low voltage regime the independent holon and spinon picture leads to results contradictory to the experimental data: the BCS-like structures which are seen experimentally in the spectra are absent.
AB - We discuss the consequences of an RVB state modelled with independent charge and spin carriers (holons and spinons, respectively), focusing on the superconducting state. The current-voltage characteristic for a tunnel junction with RVB superconductors on one side of the junction is calculated. We consider different contributions to the current through the junction: quasiparticle current, Andreev current, and Josephson current. We show that the extra degrees of freedom present in the RVB state explain the non-linear quasiparticle characteristics and the low relative Andreev signal. However, in the low voltage regime the independent holon and spinon picture leads to results contradictory to the experimental data: the BCS-like structures which are seen experimentally in the spectra are absent.
UR - http://www.scopus.com/inward/record.url?scp=0024719067&partnerID=8YFLogxK
U2 - 10.1016/0921-4534(89)90457-7
DO - 10.1016/0921-4534(89)90457-7
M3 - Journal article
AN - SCOPUS:0024719067
VL - 160
SP - 89
EP - 101
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - 1
ER -
ID: 199596365