论文标题
通过$κ$ -Type Organics中的真实Mott Truntition持续使用费米子旋转激发
Persistence of fermionic spin excitations through a genuine Mott transition in $κ$-type organics
论文作者
论文摘要
我们研究了电子状态从费米液体的连续变化到$κ$ - [（bedse-ttf）$ _ x $（bedtt-ttf）$ _ {1-x} $ _ {1-x} $ _ {1-x} $ _ $ _ 2 $ _ 2 $ _ 2 $ cu [n（cn）$ _ 2 $ _ 2 $ _ 2 $ _ 2 $ _ 2 $ _] $κ$ - $κ$ - $κ$ - $ _ x $（bedtt-tttf）$κ$ _ x $（bedtt-tttf）$κ;电气传输测量表明，将床-TTF在BEDT-TTF层中的混合诱导量子Mott过渡左右$ x $ = 0.10。尽管此时电荷差距消失，但磁化率和热容量测量表明，纤维基因低能激发仍然存在于绝缘盐中，这表明费米子旋转激发持续存在。我们建议将过渡分为真正的莫特过渡。
We investigate the continuous variation of electronic states from a Fermi liquid to a quantum spin liquid induced by chemical substitution in the organic dimer-Mott system of $κ$-[(BEDSe-TTF)$_x$(BEDT-TTF)$_{1-x}$]$_2$Cu[N(CN)$_2$]Br. Electrical transport measurements reveal that the mixing of BEDSe-TTF into the BEDT-TTF layers induces a quantum Mott transition around $x$=0.10. Although a charge gap disappears at this point, magnetic susceptibility and heat capacity measurements indicate that fermionic low-energy excitations remain in the insulating salts, suggesting that fermionic spin excitations persist. We propose that the transition can be classified into a genuine Mott transition.
