Journal
PHYSICAL REVIEW B
Volume 79, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.79.064102
Keywords
ab initio calculations; bipolar transistor switches; bismuth compounds; electronic structure; ferroelectric materials; magnetomechanical effects; metallisation; multiferroics
Funding
- MaCoMuFi [STREP_FP6-03321]
- CSIC [PIE-200760I015]
- Spanish Government [FIS2006-12117-C04-01, CSD2007-00041]
- Catalan Government [SGR2005-683]
- FAME-NoE
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We present a first-principles study of multiferroic BiFeO3 at high pressures. Our work reveals the main structural (change in Bi's coordination and suppression of the ferroelectric distortion), electronic (spin crossover and metallization), and magnetic (loss of order) effects favored by compression and how they are connected. Our results are consistent with the striking manifold transition observed experimentally by Gavriliuk [Phys. Rev. B 77, 155112 (2008)] and provide an explanation for it.
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