Abstract
The discovery of a new class of high-temperature superconductors based on iron tests the limits of current theoretical and computational tools for the understanding of strongly correlated systems.
Highlights
If you happened recently to run into a sleep-deprived condensed-matter physicist at the local coffee shop, and asked her what’s been keeping her awake at night, she’d probably tell you with excitement that she and her colleagues have been working around the clock on a new class of high-temperature superconductors
A multi-band approach is likely to be needed. This has been seen in comparisons between a multi-band analogue of the Hubbard model used to describe the cuprates and calculations using the local-density approximation (LDA) to density-functional theory — a benchmark computational method for band-structure calculations
Numerical results obtained from LDA-based computations have so far agreed qualitatively with results[5] obtained from Fermi surface characterization using angle-resolved photoemission spectroscopy (ARPES)
Summary
The discovery of a new class of high-temperature superconductors based on iron tests the limits of current theoretical and computational tools for the understanding of strongly correlated systems. These new superconductors are iron-based, in contrast to the so-called cuprates — the ‘traditional’ high-temperature superconductors based on copper, which have been studied intensively during the past two decades since the discovery of their superconducting properties.
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