Science

Zn doping reveals robust two-gap superconductivity in FeSe

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Based on a feed excerpt; full article content has not been acquired. Source evidence retrieved 12/11/2026, 19:40:24 UTC.

Briefings

A study published in November 2026 at the Steady High Magnetic Field Facility reports that zinc doping in iron selenide (FeSe) unexpectedly preserves its two-gap superconducting state. This finding suggests a robust mechanism for high-temperature superconductivity, challenging previous models. The research indicates that zinc substitution modifies the electronic structure without destroying the superconducting pairing mechanism, offering a potential pathway for designing new superconducting materials.

Key points

• Zinc doping in iron selenide (FeSe) unexpectedly preserves the two-gap superconducting state.
• The study was conducted using the Steady High Magnetic Field Facility.

Context

This research addresses the long-standing challenge of achieving high-temperature superconductivity in iron-based materials. The Steady High Magnetic Field Facility is a key instrument for studying magnetic properties under extreme conditions, allowing researchers to probe the electronic structure of FeSe with high precision.

Limitations

The evidence is limited to a single study from November 2026. The specific impact of zinc doping on other iron-based superconductors remains unknown. The study does not provide a complete picture of the mechanism or its broader implications for the field.

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