# Kang et al. Black Phosphorus Data (Dryad doi:10.5061/dryad.jwstqjqmq) Documentation for data used in Quantum Geometry RST calibration. ## Fig 1A structure **Location:** `FigureData/Fig1A/` Fig 1A contains **energy band structure** (E(k)), not quantum metric: | File | Quantity | Description | |------|----------|-------------| | `red_line.txt` | E(k) | Two energy bands near the Fermi level (2×2 Hamiltonian description) | | `black_line.txt` | E(k) | Other bands (four-band structure from four atoms per unit cell) | - **k-path:** High-symmetry line in the Brillouin zone - **Units:** Energy in eV - **Format:** Mathematica list format `{val1, val2, ...}` per line - **Source:** Tight-binding model (PRB 96, 155427 (2017)) **Note:** These files are band energies E(k), not quantum metric g(k). For quantum metric tensor data, use Fig4A–D or FigS2 (see below). ## Quantum metric tensor data For RST calibration with g(k), prefer: - **Fig4A–D** (`FigureData/Fig4A-D/`): Fig4A.txt, Fig4B.txt, Fig4C.txt, Fig4D.txt - Col 1: kx (Å⁻¹), Col 2: ky (Å⁻¹), Col 3: Gxx, Gxy, Gyy, or Tr[G] - **FigS2** (`FigureData/FigS2/`): FigS2B–D (kz=0), FigS2F–H (kz=0.3π/lz) ## Loader behavior `load_qmt_black_p()` prefers files with "metric", "g_", "qmt", or "quantum" in the filename. Use `which="black"` or `which="red"` to load a specific Fig 1A curve when only E(k) data is available (e.g. for eta-from-dispersion pipelines).