Fermi Surface And Van Hove Singularities in the Itinerant Metamagnet Sr(3)Ru(2)O(7)

Journal Article · Tue May 26 00:00:00 EDT 2009 · Phys. Rev. Lett 101:026407,2008

OSTI ID:953582

Tamai, A; Allan, M P; Mercure, J F; Meevasana, W; Dunkel, R; Lu, D H; Perry, R S; Mackenzie, A P; Singh, D J; Shen, Z -X; Baumberger, F

The low-energy electronic structure of the itinerant metamagnet Sr{sub 3}Ru{sub 2}O{sub 7} is investigated by angle-resolved photoemission and density-functional calculations. We find well-defined quasiparticle bands with resolution-limited linewidths and Fermi velocities up to an order of magnitude lower than in single layer Sr{sub 2}RuO{sub 4}. The complete topography, the cyclotron masses, and the orbital character of the Fermi surface are determined, in agreement with bulk sensitive de Haas-van Alphen measurements. An analysis of the d{sub xy} band dispersion reveals a complex density of states with van Hove singularities near the Fermi level, a situation which is favorable for magnetic instabilities.

• Research Organization: SLAC National Accelerator Lab., Menlo Park, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 953582
• Report Number(s): SLAC-REPRINT-2009-301; PRLTAO; TRN: US1000849
• Journal Information: Phys. Rev. Lett 101:026407,2008, Vol. 101, Issue 2; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
CYCLOTRONS
DENSITY FUNCTIONAL METHOD
DISPERSIONS
ELECTRONIC STRUCTURE
FERMI LEVEL
PHOTOEMISSION
RUTHENIUM COMPOUNDS
STRONTIUM COMPOUNDS
TOPOGRAPHY
Other
OTHER
PHYS