Magnetic Penetration Depth in Unconventional Superconductors

Details Magnetic Penetration Depth in Unconventional Superconductors Magnetic Penetration Depth in Unconventional Superconductors

2006-05-24

arxiv.org/abs/cond-mat/0605612v1

Superconductor Science and Technology (topical review), 19 (8), R41-R67 (2006).

Physics

Condensed Matter

Superconductivity

topical review, 57 pages, 219 references

Scientific paper

10.1088/0953-2048/19/8/R01

This topical review summarizes various features of magnetic penetration depth in unconventional superconductors. Precise measurements of the penetration depth as a function of temperature, magnetic field and crystal orientation can provide detailed information about the pairing state. Examples are given of unconventional pairing in hole- and electron-doped cuprates, organic and heavy fermion superconductors. The ability to apply an external magnetic field adds a new dimension to penetration depth measurements. We discuss how field dependent measurements can be used to study surface Andreev bound states, nonlinear Meissner effects, magnetic impurities, magnetic ordering, proximity effects and vortex motion. We also discuss how penetration depth measurements as a function of orientation can be used to explore superconductors with more than one gap and with anisotropic gaps. Details relevant to the analysis of penetration depth data in anisotropic samples are also discussed.

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