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This study confirms robust surface superconductivity in the Weyl semimetal γ-PtBi₂, validating theoretical predictions about Fermi arcs acting as conduits for macroscopic quantum coherence. By directly visualizing quantized vortices and Josephson effects at atomic scales, the research provides critical experimental evidence for using topological materials to stabilize exotic quantum states without relying on proximity effects. These findings advance the understanding of how unconventional superconductivity can be harnessed for future topological quantum computing architectures.

Surse care acoperăQuantum Zeitgeist, Quantum Computing Report, crowdfundinsider.com, The Quantum Insider

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PtBi2’s surface superconductivity holds quantum device promise

Quantum Zeitgeist1 septembrie 20265 min de cititArticolul și perspectiva sunt în engleză.

Researchers observed robust two-dimensional superconductivity on the surface of γ-PtBi2, a Weyl semimetal, revealing a distinct vortex lattice.

Researchers have directly visualized superconductivity confined to the surface of γ-PtBi₂, a topological semimetal composed of platinum and bismuth. The work demonstrates robust superconductivity with a critical temperature of 2.9 K and a critical field of approximately 1.8 T, revealed through very low temperature Scanning Tunneling Microscopy. Observations of quantized superconducting vortices and the Josephson effect demonstrate two-dimensional macroscopic quantum phase coherence within the material's surface state, a finding that addresses previous questions regarding the stability of this unusual superconducting behavior. This research involved a collaboration between scientists at Universidad Autónoma de Madrid and Iowa State…

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