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- W2024748295 abstract "Point contact Andreev reflection (PCAR) spectroscopy is a common technique for determining the spin polarization of a ferromagnetic sample. The polarization is extracted by measuring the bias dependence of the conductance of a metallic/superconducting point contact. Under ideal conditions, the conductance is dominated by Andreev reflection and the Blonder-Tinkham-Klapwijk (BTK) model can be used to extract a value for the polarization. However, PCAR spectra often exhibit unwanted features in the conductance that cannot be appropriately modelled with the BTK theory. In this paper we isolate some of these unwanted features and show that any further extraction of the spin polarization from these non-ideal spectra proves unreliable. Understanding the origin of these features provides an objective criterion for rejection of PCAR spectra unsuitable for fitting with the modified BTK model." @default.
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- W2024748295 date "2009-02-04" @default.
- W2024748295 modified "2023-09-27" @default.
- W2024748295 title "Conductance features in point contact Andreev reflection spectra" @default.
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- W2024748295 doi "https://doi.org/10.1088/0953-8984/21/9/095701" @default.
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