Severe fermi surface reconstruction at a metamagnetic transition in Ca2-xSrxRuO4 (for 0.2≤x≤0.5)
- Author(s): Balicas, L
- Nakatsuji, S
- Hall, D
- Ohnishi, T
- Fisk, Z
- Maeno, Y
- Singh, DJ
- et al.
Published Web Locationhttps://doi.org/10.1103/PhysRevLett.95.196407
We report an electrical transport study in Ca2-xSrxRuO4 single crystals at high magnetic fields (B). For x=0.2, the Hall constant Rxy decreases sharply at an anisotropic metamagnetic transition, reaching its value for Sr2RuO4 at high fields. A sharp decrease in the A coefficient of the resistivity T2 term and a change in the structure of the angular magnetoresistance oscillations for B rotating in the planes confirms the reconstruction of the Fermi surface. Our observations and local-density-approximation calculations indicate a strong dependence of the Fermi surface on Ca concentration and suggest the coexistence of itinerant and localized electronic states in single layered ruthenates. © 2005 The American Physical Society.
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