Andreev and Single Particle Tunneling Spectroscopies in Underdoped Cuprates

Details Andreev and Single Particle Tunneling Spectroscopies in Underdoped Cuprates Andreev and Single Particle Tunneling Spectroscopies in Underdoped Cuprates

2010-05-19

arxiv.org/abs/1005.3441v2

Phys. Rev. Lett. 105, 167004 (2010)

Physics

Condensed Matter

Superconductivity

5 pages, 4 figures, submitted to Phys. Rev. Lett. minor changes of references

Scientific paper

10.1103/PhysRevLett.105.167004

We study tunneling spectroscopy between a normal metal and underdoped cuprate superconductor modeled by a phenomenological theory in which the pseudogap is a precursor to the undoped Mott insulator. In the transparent tunneling limit, the spectra show a small energy gap associated with Andreev reflection. In the Giaever limit, the spectra show a large energy gap associated with single particle tunneling. Our theory semi-quantitatively describes the two gap behavior observed in tunneling experiments.

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