02272nas a2200289   4500008004100000022001400041245009400055210006900149260000900218490000700227520134800234653003101582653002001613653002701633653001601660653002101676100001901697700001501716700001901731700001501750700001601765700002101781700002101802700002101823700002101844856011701865       2024                        eng d  a0947-653900aRobust spin liquidity in 2D metal-organic framework Cu3 (HHTP)2 with S=1/2 kagome lattice0 aRobust spin liquidity in 2D metalorganic framework Cu3 HHTP2 wit  cJAN 0 v303 a<p>
	On one hand electron or hole doping of quantum spin liquid (QSL) may unlock high-temperature superconductivity and on the other hand it can disrupt the spin liquidity, giving rise to a magnetically ordered ground state. Recently, a 2D MOF, Cu-3(HHTP)(2) (HHTP - 2,3,6,7,10,11-hexahydroxytriphenylene), containing Cu(II) S = 1/2 frustrated spins in the Kagome lattice is emerging as a promising QSL candidate. Herein, we present an elegant in situ redox-chemistry strategy of anchoring Cu-3(HHTP)(2) crystallites onto diamagnetic reduced graphene oxide (rGO) sheets, resulting in the formation of electron-doped Cu-3(HHTP)(2)-rGO composite which exhibited a characteristic semiconducting behavior (5 K to 300 K) with high electrical conductivity of 70 S . m(-1) and a carrier density of similar to 1.1 x 10(18) cm(-3) at 300 K. Remarkably, no magnetic transition in the Cu-3(HHTP)(2)-rGO composite was observed down to 1.5 K endorsing the robust spin liquidity of the 2D MOF Cu-3(HHTP)(2). Specific heat capacity measurements led to the estimation of the residual entropy values of 28 % and 34 % of the theoretically expected value for the pristine Cu-3(HHTP)(2) and Cu-3(HHTP)(2)-rGO composite, establishing the presence of strong quantum fluctuations down to 1.5 K (two times smaller than the value of the exchange interaction J).</p>
10a2D Metal-organic Framework10aElectron doping10aReduced graphene oxide10aSpin Liquid10aSpin-frustration1 aNinawe, Pranay1 aJain, Anil1 aSangole, Mayur1 aAnas, Mohd1 aUgale, Ajay1 aMalik, Vivek, K.1 aYusuf, Seikh, M.1 aSingh, Kirandeep1 aBallav, Nirmalya  uhttps://library.ncl.res.in/content/robust-spin-liquidity-2d-metal-organic-framework-cu3-hhtp2-s12-kagome-lattice