Incommensurate spin-density-wave and metal-insulator transition in the one-dimensional periodic Anderson model

We have used the density-matrix renormalization group method to study the ground-state properties of the symmetric periodic Anderson model in one dimension. We have considered lattices with up to Ns = 50 sites, and electron densities ranging from quarter to half filling. Through the calculation of energies, correlation functions, and their structure factors, together with careful extrapolations (toward Ns →∞ ), we were able to map out a phase diagram U vs n ,w hereU is the electronic repulsion on f orbitals, and n is the electronic density, for a fixed value of the hybridization. At quarter filling, n = 1, our data is consistent with a transition at Uc1 � 2, between a paramagnetic (PM) metal and a spin-density-wave (SDW) insulator; overall, the region U 2 corresponds to a PM metal for all n< 2. For 1

Keywords:

• Condensed matter physics
• Spin density wave
• Metal–insulator transition
• Electronic density
• Atomic orbital
• Nuclear magnetic resonance
• Quantum electrodynamics
• Ranging
• Quantum spin liquid
• Paramagnetism
• Anderson impurity model
• Physics
• Wave vector
• Strongly correlated material

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