Phase diagram of the Kondo lattice model with a superlattice potential

3rd International Meeting for Researchers in Materials and Plasma Technology; 1st Symposium on Nanoscience and Nanotechnology

物理学;材料科学

Silva-Valencia, J.^1 ; Franco, R.^1 ; Figueira, M.S.^2

Universidad Nacional de Colombia, Bogotá, Colombia^1

Universidade Federal Fluminense, Niterói, Rio de Janeiro, Brazil^2

关键词: Density matrix renormalization group methods;    Ferromagnetic phase;    Kondo lattice model;    Local coupling;    Quantum phase transitions;    Spiral phase;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/687/1/012062/pdf
DOI  :  10.1088/1742-6596/687/1/012062

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

We study the ground state of a Kondo lattice model where the free carries undergo a superlattice potential. Using the density matrix renormalization group method, we establish that the model exhibits a ferromagnetic phase and spiral phase whose boundaries in the phase diagram depend on the depth of the potential. Also, we observed that the spiral to ferromagnetic quantum phase transition can be tuned by changing the local coupling or the superlattice strength.