AI 中文总结
该研究通过实验与数值模拟证实CeCo₂Ga₈为一维近藤金属，其低能非公度短程磁涨落与一维电子结构可由一维近藤晶格模型的DMRG模拟复现，明确其属于一维近藤晶格的非公度相。
AI 中文摘要
我们对一维近藤金属CeCo₂Ga₈的自旋涨落开展了实验与数值研究。利用非弹性中子谱，我们观测到具有低能非公度短程磁涨落的强一维磁性；角分辨光电子能谱（ARPES）同样显示强一维电子能带结构，证实该体系的一维属性。我们采用一维近藤晶格模型的密度矩阵重整化群（DMRG）模拟来解释测得的谱，该模拟成功复现了中子散射特征。据此，我们可将CeCo₂Ga₈归入一维近藤晶格相图中新兴的非公度相，并证明非微扰模拟的近藤晶格是重费米子物理的精确微观模型。这表明CeCo₂Ga₈尽管结构复杂仍为一维体系，且其非弹性谱中存在低能近藤特征与磁性特征共存的现象。
英文摘要
We present an experimental and numerical study of the spin fluctuations in 1D Kondo metal CeCo$_2$Ga$_8$. Using inelastic neutron spectroscopy, we measure highly one-dimensional magnetism with low-energy incommensurate short-ranged magnetic fluctuations. ARPES similarly shows a highly one-dimensional electronic band structure, confirming the one-dimensional nature of the system. We use density matrix renormalization group (DMRG) simulations of the 1D Kondo lattice model to interpret the measured spectrum, which successfully reproduce the neutron scattering features. We are thus able to place CeCo$_2$Ga$_8$ within the emergent incommensurate phase of the 1D Kondo lattice phase diagram, and demonstrate that the Kondo lattice simulated non-perturbatively is an accurate microscopic model for heavy fermion physics. This shows CeCo$_2$Ga$_8$ to be one-dimensional despite its complexities, and reveals a coexistence of low-energy Kondo and magnetic features in its inelastic spectrum.
Comments6 pages, 6 figures, plus 9 pages supplemental information
