Prefer a chat interface with context about you and your work?
Topological Aspect and Quantum Magnetoresistance of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>β</mml:mi><mml:mtext mathvariant="normal">−</mml:mtext><mml:msub><mml:mi>Ag</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mi>Te</mml:mi></mml:math>
To explain the unusual nonsaturating linear magnetoresistance observed in silver chalcogenides, the quantum scenario has been proposed based on the assumption of gapless linear energy spectrum. Here we show, by first principles calculations, that β-Ag2Te with distorted antifluorite structure is in fact a topological insulator with gapless Dirac-type surface states. …