Combining transport and photoemission

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Science  07 Oct 2016:
Vol. 354, Issue 6308, pp. 78-79
DOI: 10.1126/science.354.6308.78-g

Angle-resolved photoemission spectroscopy (ARPES) is routinely used to map the electronic structure of complex materials. Most commonly when studying a phase transition, the spectra are recorded and analyzed as a function of temperature. Kaminski et al. expanded the use of ARPES in cuprate superconductors by taking measurements in a sample that was experiencing current flow. After taking into account the potentially confounding effects of Joule heating, the researchers found that the current destroyed single-particle coherence in an underdoped sample of Bi2Sr2CaCu2O8+δ before the normal state was reached. The technique may be useful in the study of other materials with complex phase diagrams.

Phys. Rev. X 6, 031040 (2016).

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