First-order ferromagnetic phase transition in the low electronic density regime of a biased graphene bilayer

• Tipo: Artigo em Revista Científica Internacional
• Data: 2008

Autores

Stauber, T (Autor) Outra; Eduardo V Castro (Autor) FCUP; Silva, NAP (Autor) Outra; Peres, NMR (Autor) Outra

Revista

Título: Journal of Physics Condensed Matter

Vol. 20

ISSN: 0953-8984

Editora: Institute of Physics Publishing

Indexação

ISI Web of Knowledge - 9 Citações

Scopus - 6 Citações

Outras Informações

ID Authenticus: P-003-WZ3

DOI: 10.1088/0953-8984/20/33/335207

Abstract (EN): The phase diagram of a biased graphene bilayer is computed and the existence of a ferromagnetic phase is discussed both in the critical on-site interaction U-c versus doping density and versus temperature. We show that in the ferromagnetic phase the two planes have unequal magnetization and that the electronic density is hole-like in one plane and electron-like in the other. We give evidence for a first-order phase transition between paramagnetic and ferromagnetic phases induced by doping at zero temperature.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 10