Physics – Condensed Matter – Superconductivity
Scientific paper
2005-10-27
Phys. Rev. B 73, 214514 (2006)
Physics
Condensed Matter
Superconductivity
10 pages, 13 figures
Scientific paper
10.1103/PhysRevB.73.214514
The Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state has received renewed interest recently due to the experimental indication of its presence in CeCoIn$_5$, a quasi 2-dimensional (2D) d-wave superconductor. However direct evidence of the spatial variation of the superconducting order parameter, which is the hallmark of the FFLO state, does not yet exist. In this work we explore the possibility of detecting the phase structure of the order parameter directly using conductance spectroscopy through micro-constrictions, which probes the phase sensitive surface Andreev bound states of d-wave superconductors. We employ the Blonder-Tinkham-Klapwijk formalism to calculate the conductance characteristics between a normal metal (N) and a 2D $s$- or $d_{x^2-y^2}$-wave superconductor in the Fulde-Ferrell state, for all barrier parameter $z$ from the point contact limit ($z=0$) to the tunneling limit ($z \gg 1$). We find that the zero-bias conductance peak due to these surface Andreev bound states observed in the uniform d-wave superconductor is split and shifted in the Fulde-Ferrell state. We also clarify what weighted bulk density of states is measured by the conductance in the limit of large $z$.
Cui Qinghong
Hu Chia-Ren
Wei J. Y. T.
Yang Kun
No associations
LandOfFree
Conductance characteristics between a normal metal and a two-dimensional Fulde-Ferrell-Larkin-Ovchinnikov superconductor: the Fulde-Ferrell state does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Conductance characteristics between a normal metal and a two-dimensional Fulde-Ferrell-Larkin-Ovchinnikov superconductor: the Fulde-Ferrell state, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Conductance characteristics between a normal metal and a two-dimensional Fulde-Ferrell-Larkin-Ovchinnikov superconductor: the Fulde-Ferrell state will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-322994