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Evidence of quantum spin liquid state in a <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msup><mml:mrow><mml:mi>Cu</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:math> -based <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>S</mml:mi><mml:mo>=</mml:mo><mml:mfrac><mml:mn>1</mml:mn><mml:mn>2</mml:mn></mml:mfrac></mml:mrow></mml:math> triangular lattice antiferromagnet
The layered triangular lattice owing to $1:2$ order of $B$ and ${B}^{\ensuremath{'}}$ sites in the triple perovskite ${A}_{3}B{B}_{2}^{\ensuremath{'}}{\mathrm{O}}_{9}$ family provides an enticing domain for exploring the complex phenomena of quantum spin liquids (QSLs). We report a comprehensive investigation of the ground-state properties of ${\mathrm{Sr}}_{3}{\mathrm{CuTa}}_{2}{\mathrm{O}}_{9}$ that belongs to the above family …