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Evolution of magnetism in the single-crystal honeycomb iridates<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mo>(</mml:mo><mml:msub><mml:mtext>Na</mml:mtext><mml:mrow><mml:mn>1</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:math>Li<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mrow /><mml:mi>x</mml:mi></mml:msub><mml:msub><mml:mo>)</mml:mo><mml:mn>2</mml:mn></mml:msub><mml:mtext>Ir</mml:mtext><mml:msub><mml:mtext>O</mml:mtext><…
We report the successful synthesis of single crystals of the layered iridate (Na${}_{1\ensuremath{-}x}$Li${}_{x}$)${}_{2}$IrO${}_{3}$, $0\ensuremath{\le}x\ensuremath{\le}0.9$, and a thorough study of its structural, magnetic, thermal, and transport properties. This compound allows a controlled interpolation between Na${}_{2}$IrO${}_{3}$ and Li${}_{2}$IrO${}_{3}$, while maintaining the quantum magnetism of the honeycomb Ir${}^{4+}$ planes. The measured phase diagram …