{
  "schema": "semiagora.2d-heterojunction-ndr-mechanism-evidence-map.v1",
  "version": "2026-08-27-v104",
  "experiment_id": "SA-DEV-2D-NDR-005",
  "title": "2D heterojunction NDR mechanism and evidence map",
  "summary": "A deterministic browser packet that separates rectification, consecutive negative slope, peak/valley prominence, overlap-window shape, broadening, series/contact burden, sweep history, trap-memory contradiction, mechanism ambiguity, and owned replacement evidence.",
  "execution_mode": "precomputed_browser_csv_replay_only",
  "counts": {
    "rows": 6144,
    "curves": 384,
    "sweep_pairs": 192,
    "stable_ndr_curves": 204,
    "non_ndr_curves": 180,
    "hysteresis_contradiction_curves": 160,
    "rectification_without_ndr_curves": 159,
    "bias_states": 16,
    "gate_states": 4,
    "alignment_states": 3,
    "broadening_states": 2,
    "background_states": 2,
    "series_contact_states": 2,
    "sweep_directions": 2,
    "trap_memory_states": 2,
    "taxonomy_nodes_covered": 9,
    "source_anchors": 5,
    "zero_boundary_fields": 19,
    "zero_boundary_comparisons": 116736,
    "external_numeric_values": 0,
    "copied_source_results": 0,
    "copied_trace_points": 0,
    "physical_dimensions": 0,
    "calibrated_models": 0,
    "live_tcad_runs": 0,
    "live_negf_runs": 0,
    "live_spice_runs": 0,
    "measured_device_rows": 0,
    "mechanism_proof_claims": 0,
    "circuit_advantage_claims": 0,
    "performance_rankings": 0,
    "fabrication_recipe_actions": 0,
    "optimization_recommendations": 0,
    "signoff_actions": 0,
    "liveServerRuns": 0
  },
  "axes": {
    "bias_states": [
      {
        "id": "bias_negative_112",
        "label": "-1.12 normalized bias",
        "value": -1.12
      },
      {
        "id": "bias_negative_096",
        "label": "-0.96 normalized bias",
        "value": -0.96
      },
      {
        "id": "bias_negative_080",
        "label": "-0.80 normalized bias",
        "value": -0.8
      },
      {
        "id": "bias_negative_064",
        "label": "-0.64 normalized bias",
        "value": -0.64
      },
      {
        "id": "bias_negative_048",
        "label": "-0.48 normalized bias",
        "value": -0.48
      },
      {
        "id": "bias_negative_032",
        "label": "-0.32 normalized bias",
        "value": -0.32
      },
      {
        "id": "bias_negative_016",
        "label": "-0.16 normalized bias",
        "value": -0.16
      },
      {
        "id": "bias_negative_008",
        "label": "-0.08 normalized bias",
        "value": -0.08
      },
      {
        "id": "bias_positive_008",
        "label": "0.08 normalized bias",
        "value": 0.08
      },
      {
        "id": "bias_positive_016",
        "label": "0.16 normalized bias",
        "value": 0.16
      },
      {
        "id": "bias_positive_032",
        "label": "0.32 normalized bias",
        "value": 0.32
      },
      {
        "id": "bias_positive_048",
        "label": "0.48 normalized bias",
        "value": 0.48
      },
      {
        "id": "bias_positive_064",
        "label": "0.64 normalized bias",
        "value": 0.64
      },
      {
        "id": "bias_positive_080",
        "label": "0.80 normalized bias",
        "value": 0.8
      },
      {
        "id": "bias_positive_096",
        "label": "0.96 normalized bias",
        "value": 0.96
      },
      {
        "id": "bias_positive_112",
        "label": "1.12 normalized bias",
        "value": 1.12
      }
    ],
    "gate_states": [
      {
        "id": "depleted_gate_proxy",
        "label": "Depleted-gate proxy",
        "centerShift": -0.14,
        "amplitudeFactor": 0.46,
        "reverseBackgroundFactor": 0.78,
        "reverseWindowFactor": 0.56,
        "note": "Original low-overlap electrostatic state; no physical gate voltage or carrier density is implied."
      },
      {
        "id": "opening_gate_proxy",
        "label": "Opening-gate proxy",
        "centerShift": -0.05,
        "amplitudeFactor": 0.74,
        "reverseBackgroundFactor": 0.5,
        "reverseWindowFactor": 0.34,
        "note": "Original transition state used to separate rectification from an NDR window."
      },
      {
        "id": "aligned_gate_proxy",
        "label": "Aligned-gate proxy",
        "centerShift": 0.07,
        "amplitudeFactor": 1,
        "reverseBackgroundFactor": 0.3,
        "reverseWindowFactor": 0.2,
        "note": "Original alignment state; it is not a source-derived voltage, band offset, or device setting."
      },
      {
        "id": "overdriven_gate_proxy",
        "label": "Overdriven-gate proxy",
        "centerShift": 0.17,
        "amplitudeFactor": 0.84,
        "reverseBackgroundFactor": 0.22,
        "reverseWindowFactor": 0.15,
        "note": "Original shifted-window boundary state, not a device optimization or operating recommendation."
      }
    ],
    "alignment_states": [
      {
        "id": "staggered_limited_overlap_proxy",
        "label": "Staggered / limited-overlap proxy",
        "center": 0.37,
        "amplitude": 0.56,
        "reverseWindowFactor": 0.52,
        "mechanismHypothesis": "rectification_or_background_transport_hypothesis",
        "note": "Original limited-overlap shape class; no material pair or band offset is represented."
      },
      {
        "id": "near_broken_gap_window_proxy",
        "label": "Near-broken-gap window proxy",
        "center": 0.55,
        "amplitude": 1,
        "reverseWindowFactor": 0.28,
        "mechanismHypothesis": "band_overlap_tunneling_window_hypothesis",
        "note": "Original overlap-window class used for evidence literacy, not a DOS integral or band calculation."
      },
      {
        "id": "resonant_alignment_window_proxy",
        "label": "Resonant-alignment window proxy",
        "center": 0.7,
        "amplitude": 1.16,
        "reverseWindowFactor": 0.16,
        "mechanismHypothesis": "resonant_or_momentum_selective_window_hypothesis",
        "note": "Original narrow-alignment contrast; it does not establish coherent or momentum-conserving tunneling."
      }
    ],
    "broadening_states": [
      {
        "id": "narrow_window_proxy",
        "label": "Narrow-window proxy",
        "width": 0.14,
        "amplitudeFactor": 1,
        "note": "Original low-broadening state with no temperature, linewidth, lifetime, or disorder unit."
      },
      {
        "id": "broad_window_proxy",
        "label": "Broad-window proxy",
        "width": 0.25,
        "amplitudeFactor": 0.72,
        "note": "Original broadened state; it is not a thermal, spectral, disorder, or scattering fit."
      }
    ],
    "background_states": [
      {
        "id": "low_background_conductance_proxy",
        "label": "Low-background conductance proxy",
        "linear": 0.1,
        "quadratic": 0.025,
        "note": "Original monotonic floor; no leakage, mobility, conductance, or current unit is implied."
      },
      {
        "id": "elevated_background_conductance_proxy",
        "label": "Elevated-background conductance proxy",
        "linear": 0.28,
        "quadratic": 0.08,
        "note": "Original elevated floor used to expose masking of a declining overlap window."
      }
    ],
    "series_contact_states": [
      {
        "id": "bounded_series_contact_proxy",
        "label": "Bounded series/contact proxy",
        "transfer": 0.92,
        "compression": 0.22,
        "centerShift": 0,
        "broadening": 0.01,
        "note": "Original bounded burden; it is not contact resistance, specific resistivity, or de-embedding."
      },
      {
        "id": "high_series_contact_burden_proxy",
        "label": "High series/contact burden proxy",
        "transfer": 0.67,
        "compression": 0.62,
        "centerShift": 0.07,
        "broadening": 0.06,
        "note": "Original severe burden used to expose masking and peak movement, not a measured contact value."
      }
    ],
    "sweep_directions": [
      {
        "id": "forward_sweep",
        "label": "Forward sweep",
        "direction": 1
      },
      {
        "id": "reverse_sweep",
        "label": "Reverse sweep",
        "direction": -1
      }
    ],
    "trap_memory_states": [
      {
        "id": "no_memory_mathematical_reference",
        "label": "No-memory mathematical reference",
        "shift": 0,
        "amplitudePenalty": 0,
        "note": "Intentional zero-history reference; it is not evidence that a real interface is trap-free."
      },
      {
        "id": "finite_trap_memory_proxy",
        "label": "Finite trap-memory proxy",
        "shift": 0.08,
        "amplitudePenalty": 0.08,
        "note": "Original direction-dependent shift used to test sweep-history contradictions, not a trap extraction."
      }
    ]
  },
  "methods": [
    "Generate the complete 16 x 4 x 3 x 2 x 2 x 2 x 2 x 2 Cartesian sweep with no randomness, fitting, optimization, hidden state, source calibration, or external device value.",
    "Build an original dimensionless monotonic background plus a gate- and alignment-shifted overlap-window envelope, then apply a declared series/contact compression transform to both bias polarities.",
    "Require two consecutive positive-branch finite-difference slopes below the declared threshold and a minimum peak/valley prominence before labeling a stable NDR proxy; one falling segment never passes.",
    "Compare matched forward and reverse curves before classification, preserve rectification as a separate equal-magnitude branch ratio, and route every shape to an owned replacement-evidence gate.",
    "Keep nine topic-specific claim maps and five primary/open source anchors separate from all generated coefficients and rows."
  ],
  "limitations": [
    "No DOS integration, Fermi occupation integral, transfer Hamiltonian, NEGF, DFT, TCAD, compact model, SPICE, thermal model, trap kinetics, uncertainty propagation, or live server solver is executed.",
    "Bias, current, slope, window center/width/amplitude, peak/valley, rectification, sweep delta, and readiness are dimensionless within-packet quantities, not physical or measured device values.",
    "A synthetic NDR shape cannot identify broken-gap, resonant, momentum-conserving, defect-assisted, thermionic, contact-shaped, or other transport mechanisms."
  ],
  "public_boundary": [
    "Zero source numeric values, copied results, copied trace points, dimensions, material parameters, process conditions, contact values, calibrated models, live TCAD/NEGF/SPICE runs, measured rows, mechanism proofs, circuit advantages, rankings, recipes, optimization recommendations, signoff actions, or live server runs enter the dataset.",
    "No physical gate, bias, temperature, material, stack, contact, geometry, linewidth, current, ratio, density, mobility, time, frequency, energy, power, area, or application value is predicted or recommended.",
    "No neuromorphic, multivalued-logic, oscillator, low-power, product, vendor, material, architecture, or performance advantage is claimed.",
    "A real claim requires owned forward/reverse I-V sweeps across declared gate and temperature conditions, contact/series evidence, repeatability, uncertainty, model lineage, independently reproduced transport calculations, mechanism discrimination, and accountable review."
  ],
  "source_observation": {
    "observation_date": "2026-08-27",
    "mode": "Primary/open link, metadata, abstract-level mechanism taxonomy, and rights-boundary review only.",
    "exclusion": "No source curve, value, equation, model coefficient, device stack, measurement condition, or performance claim is used as a model input."
  },
  "sources": [
    {
      "id": "src-sci-rep-2026-mote2-sns2-ndr",
      "label": "Gate-tunable NDR in a multifunctional van der Waals heterostructure",
      "organization": "Scientific Reports / research authors",
      "url": "https://www.nature.com/articles/s41598-026-68365-1",
      "sourceClass": "open_peer_reviewed_primary",
      "rights": "Open article link, metadata, abstract-level scope, and original synthesis only; no article body, figure, table, equation, device stack, dimension, process, trace, bias, temperature, ratio, DFT result, or fit is copied.",
      "note": "Primary scope anchor for keeping gate-tunable rectification, NDR, temperature dependence, and mechanism evidence distinct."
    },
    {
      "id": "src-arxiv-2409-04908",
      "label": "Gate-tunable NDR preprint lineage",
      "organization": "arXiv / research authors",
      "url": "https://arxiv.org/abs/2409.04908",
      "sourceClass": "open_preprint_lineage",
      "rights": "Public metadata, abstract, version history, and link only; no source TeX, body, figure, table, equation, device value, trace, or result is copied.",
      "note": "Version-lineage anchor for the later peer-reviewed article."
    },
    {
      "id": "src-natcomm-2016-bp-res2-ndr",
      "label": "Phosphorene/ReS2 heterojunction NDR",
      "organization": "Nature Communications / research authors",
      "url": "https://www.nature.com/articles/ncomms13413",
      "sourceClass": "open_peer_reviewed_primary",
      "rights": "Open article link and metadata only; no body, figure, material stack, measurement, reported metric, circuit, or application claim is copied.",
      "note": "Primary contrast anchor for a broken-gap heterojunction mechanism class."
    },
    {
      "id": "src-arxiv-1706-08034",
      "label": "Coherent interlayer tunneling and NDR",
      "organization": "arXiv / research authors",
      "url": "https://arxiv.org/abs/1706.08034",
      "sourceClass": "open_preprint_primary",
      "rights": "Public metadata, abstract, and link only; no geometry, spectrum, calculation, model parameter, trace, figure, table, or reported performance is copied.",
      "note": "Primary contrast anchor for energy- and momentum-conserving resonant-tunneling evidence."
    },
    {
      "id": "src-arxiv-1412-3027",
      "label": "Gate-tunable resonant tunneling in double bilayer graphene",
      "organization": "arXiv / research authors",
      "url": "https://arxiv.org/abs/1412.3027",
      "sourceClass": "open_preprint_primary",
      "rights": "Public metadata, abstract, and link only; no geometry, calculation, spectrum, model parameter, trace, figure, table, or reported performance is copied.",
      "note": "Primary contrast anchor for alignment-controlled resonance and NDR evidence."
    }
  ]
}