Magnetic field–induced pair density wave state in the cuprate vortex halo

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Science  07 Jun 2019:
Vol. 364, Issue 6444, pp. 976-980
DOI: 10.1126/science.aat1773

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Decoding the halo pattern

Magnetic fields can cause the formation of vortices in a superconductor. In cuprate superconductors, the vortex cores are surrounded by “halos,” where the density of electronic states exhibits a checkerboard pattern. Edkins et al. used scanning tunneling spectroscopy to take a closer look into the halos. The results revealed that the patterns correspond to an exotic state called the pair density wave, in which the density of finite momentum Cooper pairs is spatially modulated.

Science, this issue p. 976