期刊
PHYSICS LETTERS A
卷 384, 期 4, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.physleta.2019.126095
关键词
Effective potential; Scalar order parameters; Competing ground states; Two-dimensional systems; Quantum fluctuations
资金
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
- Fundacao Carlos Chagas Filho de Amparo a Pesquisa do Estado do Rio de Janeiro (FAPERJ)
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)
Using the method of the effective potential of quantum field theory, we compute the quantum corrections to the phase diagram of systems with competing order parameters. This is specially useful to study metallic systems with competing antiferromagnetic and superconducting ground states. We focus on the two-dimensional case that is relevant for high Tc superconductors and heavy fermion systems. We consider two different types of couplings between the order parameters and obtain the modifications in the phase diagrams due to critical quantum fluctuations in these systems with conflicting orders. We consider z = 1, as well as a dissipative z = 2 dynamics, typical of antiferromagnetic metals close to the magnetic quantum critical point. Our results show that these depend strongly on both dimensionality and dynamics of the propagators describing the excitations of the possible ordered states. We find stable unconventional coexisting phases, as well as the enhancement of the region of coexistence by fluctuations. (C) 2019 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据