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Smeared d‐Wave Anisotropy in a Monolayer Organic Superconductor

Authors: Abdou Hassanien

Adv. Electron.Mater. 2019, 5, 1800247

Abstract: An epitaxially grown monolayer of organic superconductor, (BETS)2GaCl4, on Ag(111) forms islands of uniform and mixed stacking of 2D stripes. A d‐wave superconducting gap of magnitude 2Δ = 14 meV is ubiquitously measured even though orientation directions of the molecular chains are altered in the inhomogeneous islands. Mixing of intrastripes antinodal states is manifested by smeared anisotropy of the low energy quasiparticle as well as features of multigaps in their density of states. Despite proximal convolution, the pronounced coherence peaks indicate well preserved superconducting state. The interplay between structural parameters and electronic properties makes single layer (BETS)2GaCl4 a unique playground to test the effect of confinement and symmetry variation on the superconducting ground state.


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