AI 中文总结
研究分数化费米液体，通过幽灵-古兹维勒近似在单带$t$-$J$模型中实现$\mathrm{FL}^{\!*}$相，优化时考虑平均场计算，其温度-掺杂相图再现了铜酸盐现象学关键特征。
AI 中文摘要
分数化费米液体（$\mathrm{FL}^{\!*}$）是难以捉摸的金属态，其具有分数化准粒子以及传统准粒子，且违反卢廷格定理，是欠掺杂铜酸盐赝能隙区域的主要候选者。我们表明，通过一个简单的幽灵-古兹维勒近似，在单带$t$-$J$模型中出现了$\mathrm{FL}^{\!*}$相，该近似以平均场计算为代价进行优化。所得的温度-掺杂相图包含低掺杂$\mathrm{FL}^{\!*}$、$d$波超导穹顶和过掺杂传统费米液体，从而再现了铜酸盐现象学的关键定性特征。
英文摘要
Fractionalized Fermi liquids ($\mathrm{FL}^{\!*}$), elusive metallic states characterized by fractionalized quasiparticles alongside conventional ones and defying Luttinger's theorem, are prime candidates for the pseudogap regime of underdoped cuprates. We show that a $\mathrm{FL}^{\!*}$ phase emerges in the single-band $t$-$J$ model through a simple ghost-Gutzwiller Ansatz, optimized at the cost of a mean-field calculation. The resulting temperature-doping phase diagram encompasses a low-doping $\mathrm{FL}^{\!*}$, a $d$-wave superconducting dome, and an overdoped conventional Fermi liquid, thereby reproducing key qualitative features of cuprate phenomenology.
Comments5 pages of main text with 2 figures, and 7 pages of supplemental material
