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

• Type: Article in International Scientific Journal
• Date: 2008

Authors

Stauber, T (Author) Other; Eduardo V Castro (Author) FCUP; Silva, NAP (Author) Other; Peres, NMR (Author) Other

Journal

Title: Journal of Physics Condensed Matter

Vol. 20

ISSN: 0953-8984

Publisher: Institute of Physics Publishing

Indexing

ISI Web of Knowledge - 9 Citations

Scopus - 6 Citations

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10