论文标题
在$ \ Mathrm {Bafe_ {2}}}（\ Mathrm {as} _ {1-x} \ Mathrm {p} _ {p} _ {x} _ {x} _ {x} \ mathrm {2} = 2
Superconducting gap and nematic resonance at the quantum critical point observed by Raman scattering in $\mathrm{BaFe_{2}}(\mathrm{As}_{1-x}\mathrm{P}_{x}\mathrm{)_{2}}$
论文作者
论文摘要
我们报告了拉曼散射光谱的全面温度和掺杂依赖性，以$ \ mathrm {bafe_ {2}}（\ m athrm {as} _ {1-x} \ Mathrm {p} _ {p} _ {p} _ {x} _ {x}} 0.38），着重于列的波动和超导反应。随着$ x $的增加，从拉曼光谱中估计的裸列过渡温度在最佳掺杂时达到$ t = $ 0 k，这表明该组成处的量子临界点（QCP）。 In the superconducting compositions, in addition to the pair breaking peaks observed in the $A_{\mathrm{1g}}$ and $B_{\mathrm{1g}}$ spectra, another strong $B_{\mathrm{1g}}$ peak appears below the superconducting transition temperature which is ascribed to the nematic resonance peak.对该峰的观察表明，该化合物在QCP附近的超导状态中的显着nematic相关性。
We report comprehensive temperature and doping-dependences of the Raman scattering spectra for $\mathrm{BaFe_{2}}(\mathrm{As}_{1-x}\mathrm{P}_{x}\mathrm{)_{2}}$ ($x =$ 0, 0.07, 0.24, 0.32, and 0.38), focusing on the nematic fluctuation and the superconducting responses. With increasing $x$, the bare nematic transition temperature estimated from the Raman spectra reaches $T =$ 0 K at the optimal doping, which indicates a quantum critical point (QCP) at this composition. In the superconducting compositions, in addition to the pair breaking peaks observed in the $A_{\mathrm{1g}}$ and $B_{\mathrm{1g}}$ spectra, another strong $B_{\mathrm{1g}}$ peak appears below the superconducting transition temperature which is ascribed to the nematic resonance peak. The observation of this peak indicates significant nematic correlations in the superconducting state near the QCP in this compound.
