A Realistic Pathway Toward an Ambient-Pressure, Room-Temperature Superconductor: Design, Theory, and Experimentally-Tractable Synthesis of a “Moiré-Clathrate” Hydrogen-Rich Heterostructure

Abstract

Giustino Travaglini

I propose a physically realistic, experimentally tractable material architecture that by combining three independently validated strategies from recent literature could plausibly host superconductivity at or near room temperature (≈300 K) at ambient pressure. The architecture (which I call a moiré-clathrate heterostructure) integrates

(1) Flat-band, strongly correlated physics produced by moiré engineering of two-dimensional layers (twisted bilayer graphene and related moiré systems),

(2) Hydrogen-derived, high-frequency phonon modes and strong electron-phonon coupling localized in nanoscale hydrogen-rich clathrate units (chemical precompression / super hydride concepts), and

(3) Controlled charge transfer / chemical precompression from adjacent oxide/rare-earth layers (nickelate / oxide reservoir layers) to tune carrier density and stabilize hydrogen units at low pressure.

I lay out the theoretical motivation, a concrete materials recipe using current synthesis tools (CVD, van-der-Waals stacking, MBE, electrochemical intercalation, and clathrate encapsulation routes), measurable experimental signatures, and ab-initio modeling steps required to evaluate feasibility. The proposal builds on high-Tc hydride results, moiré superconductivity, and clathrate hydride chemistry; it highlights critical technical challenges (hydrogen stabilization at ambient pressure, controlled hybridization, disorder management) and offers mitigation strategies. This document is intended as a practical research roadmap rather than a claim of immediate success.

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