Researchers led by Alain Sacuto from the Laboratoire Matériaux et Phénomènes Quantiques at the Université Paris Diderot-Paris 7 have measured the charge density wave (CDW) energy gap in various cuprates. The observations point to a key and hitherto difficult to measure property of the CDW state. They also help explain the relationship between competing CDW and superconducting phases, which arise from a coherent superposition of electron-hole and electron-electron (Cooper) pairs, respectively, in high-temperature superconductors. The work is reported in Nature Physics.
Reference: Intimate link between charge density wave, pseudogap and superconducting energy scales in cuprates, B. Loret et al., Nature Physics
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