{
  "id": 14297280,
  "title": "'Carpet' growth method yields long-sought 2D quantum material",
  "url": "https://urgent.news/2026/10/13/carpet-growth-method-yields-long-sought-2d-quantum-material",
  "topic": "science",
  "section": "Science",
  "published": "2026-10-13T21:30:02.000Z",
  "source": {
    "name": "Phys.org",
    "slug": "phys-org",
    "url": "https://phys.org/news/2026-10-carpet-growth-method-yields-sought.html"
  },
  "original_language": "en",
  "account": "Decades of searching for practical two-dimensional topological insulators have paid off with a breakthrough from researchers at the University of Chicago Pritzker School of Molecular Engineering. These scientists have demonstrated conclusive evidence that ultrathin films of bismuth telluride possess the properties of a 2D topological insulator. Unlike traditional wires where electrons lose energy due to scattering, the edges of a 2D topological insulator allow electrons with opposite spins to travel in opposite directions, minimizing energy loss. The key challenge was creating a uniform-thickness film, as previous attempts resulted in films with varying thicknesses. Using molecular beam epitaxy, the researchers developed a \"carpet mode\" technique that grew the films in a continuous layer over tiny atomic steps, resulting in millimeter-scale films with consistent thickness. Spectroscopic studies confirmed the material's 2D topological properties, including its unique band structure and conducting edge channels. The discovery opens up possibilities for energy-efficient devices that could operate near room temperature.",
  "summary": "For decades, physicists have sought a practical two-dimensional topological insulator: an ultrathin material whose interior blocks electricity but whose edges conduct it. In ordinary wires, electrons constantly bounce off imperfections, losing energy. But along the edges of a 2D topological insulator, electrons with opposite spins travel in opposite directions, like cars in one-way lanes, so they…",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}