Down-selected rare-earth transition-metal silicide (RE-T-Si) genus for superconducting and heavy-fermion device applications

This asset is the curated, computationally validated genus of rare-earth transition-metal silicides (RE-T-Si) in the 1:1:1 stoichiometry family, positioned specifically for superconducting and heavy-fermion device applications. It is the downstream output of an upstream computational screening engine: the screening method produces a defined set of consensus-stable, freedom-to-operate-prescreened members, and this genus packages those survivors as a licensed instrument covering method-of-screening and device use. The compositions themselves are literature-known — arc-melted and flux-grown RE-T-Si phases have been studied since the 1980s — so the value is not in claiming novel matter. The value is a curated, evidence-anchored shortlist that competitors also cannot composition-claim, delivered with the method and device-use framing that sidesteps composition prior art entirely. Why this matters now is a structural argument about the cryogenic and quantum device supply chain. As quantum computing hardware programs scale from demonstration to production, device makers need validated material families with clear IP footing — not just academic citations of interesting compositions. This genus provides exactly that: 79 of 81 finalist members screened clear for freedom-to-operate, stability confirmed by majority consensus across four independent machine-learning interatomic potentials, and claims scoped to device use and selection method rather than bare composition. A buyer who licenses this genus acquires defensible device-use rights across a well-populated family of heavy-fermion intermetallics without picking a composition fight that prior art would win.

Each candidate is validated by multiple independent machine-learning interatomic potentials. A material advances only when the engines agree on phonon (dynamic) stability — disagreement is surfaced, not hidden.

The genus spans RE-T-Si compositions near 1:1:1 stoichiometry, with each crystallographic site permitted a ±10 atomic percent tolerance. The rare-earth site draws from a broad sweep of lanthanides — La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu — plus Y and Sc, while the transition-metal site is open across the d-block. Structure types are the tetragonal ThCr2Si2-derived family, the PbFCl-CeFeSi type, and related layered intermetallics. These are canonical heavy-fermion systems: the 4f electrons of the rare-earth site hybridize with conduction bands to produce strongly correlated electronic behavior, the physical basis for both unconventional superconductivity and the large effective masses that underlie heavy-fermion sensing. The five lead members named in the device-use claims — CeCuSi, CeNiSi, CeRuSi, LaRuSi, and NdNiSi — are representative anchors spanning Ce-based and La/Nd-based arms of the family. Stability validation followed a consensus protocol. Each candidate was evaluated independently by four machine-learning interatomic potentials (including MACE and CHGNet), with phonon spectra computed per member; a material advances only when a majority of the four engines agree on dynamic stability — no imaginary phonon modes. The overall verdict across the genus is majority-stable, meaning the preponderance of the four-engine ensemble endorses the structural viability of the surviving members. Alongside the phonon screen, each member also passed a per-member freedom-to-operate prescreen using the computational whitespace tooling. The combined throughput produces the standout figure: 79 of 81 finalists cleared both the stability and the IP prescreen, a 97.5 percent pass rate. The two non-clearing finalists are excluded from the claimed subset and referred for additional legal analysis; they do not contaminate the clean 79-member core. Synthesis is straightforward by intermetallic standards. Published routes — arc or induction melting of elemental charges followed by annealing, flux growth for single crystals, and thin-film deposition by sputtering, molecular-beam epitaxy, or pulsed-laser deposition — have been demonstrated for members of this family in the academic literature. This lowers integration risk for a device partner who already works with cryogenic materials: no exotic precursor chemistry is required, and process parameters are adaptable from existing playbooks.

We estimate the addressable market at $1–5 billion across superconducting electronics, cryogenic sensing, and quantum computing hardware. These three segments are structurally linked: all require low-temperature materials with well-defined electronic properties, and all are in a period of accelerating capital deployment as quantum hardware programs mature from academic demonstrations toward engineered devices at scale. The primary buyers within this market are cryogenic and quantum device manufacturers — companies building superconducting qubits, cryogenic interconnects, flux sensors, and related components — who require material families with both performance credentials and clear IP standing. The licensing logic for this genus is genus-wide rather than member-by-member. A device maker pursuing multiple product lines across the heavy-fermion family benefits from a single field-of-use license covering the full screened genus, paying a running royalty per device or per deployment rather than negotiating separate agreements for each composition. This is the commercial advantage of the genus packaging: the licensee acquires freedom to operate across the entire validated family in one transaction, with the named lead members as concrete anchors for initial device development and the broader genus available as programs expand. A materials discovery or IP-holding company would model this differently — as an upstream acquisition that bundles the screening engine with the curated genus output, capturing royalty streams from multiple downstream device makers simultaneously.

device-use whitespace over a literature-known genus that competitors cannot composition-claim

claimed by method-of-screening + device-use ONLY; composition-of-matter to literature-known members expressly disclaimed (prior-art-barred); 2 non-clear finalists excluded and referred to counsel

The most direct acquirers and licensees are cryogenic and quantum device manufacturers — companies building superconducting qubit architectures, cryogenic interconnects, SQUID-based sensors, and related hardware — who need validated material families with defensible IP standing and no composition-claim exposure. A device strategic active across multiple product lines spanning superconducting and sensing applications would take a genus-wide field-of-use license, paying for the pre-vetted shortlist and the device-use rights rather than assembling a comparable package from scratch. The value proposition is speed and defensibility: this genus arrives with four-engine stability provenance and a 97.5 percent freedom-to-operate clearance rate already documented. A materials discovery or IP-holding entity represents the acquisition path. Owning both the upstream computational screening method and the curated genus it produces creates a coherent two-layer package — the engine and its highest-value output — that can be licensed as a platform to multiple downstream device makers simultaneously. The decision between licensing and acquisition tracks with the breadth of device ambition: a maker focused on specific device families licenses the relevant genus members, while a strategic seeking to control the validated shortlist across all competitors and device segments acquires or takes exclusivity. The five flagship members anchor whichever device lanes a licensee prioritizes first, with the broader genus available as programs expand into additional rare-earth and transition-metal combinations.

The primary risk is structural and fully disclosed: the genus compositions are literature-known, so the asset's entire commercial value rests on method-of-screening and device-use framing. Any erosion of that framing — through claim amendment, reexamination, or an unfavorable construction of what constitutes device use — narrows the licensable position. Certainty on the patent side is intentionally bounded to reflect this constraint, and buyers should price accordingly. A second risk is the two non-clearing finalists: their exclusion keeps the clean core intact, but if one or both ultimately cannot be cleared, the genus is slightly smaller than the full finalist set, and the question of whether adjacent compositions create file-wrapper estoppel warrants counsel review. On the technical side, stability validation is currently at machine-learning consensus level; first-principles DFPT confirmation per flagship member has not yet been completed, and the f-electron physics of rare-earth heavy-fermion systems is known to challenge some ML potentials' transferability. Most critically, superconducting transition temperatures and heavy-fermion calorimetry on the named members are unmeasured by this team — device-use claims built on literature precedent and computational screens will be strengthened materially by first-party Tc data. The de-risking roadmap is clear and sequential: DFPT on lead members, resolution of the two non-clear finalists, synthesis and transport measurements on the Ce-based flagship members, and formal packaging of the genus as a counsel-ready licensing instrument.