Published November 3, 2006
| Published
Journal Article
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Complete d-Band Dispersion Relation in Sodium Cobaltates
Abstract
We utilize fine-tuned polarization selection coupled with excitation-energy variation of photoelectron signal to image the complete d-band dispersion relation in sodium cobaltates. A hybridization gap anticrossing is observed along the Brillouin zone corner and the full quasiparticle band is found to emerge as a many-body entity lacking a pure orbital polarization. At low dopings, the quasiparticle bandwidth (Fermion scale, many-body E_F∼0.25 eV) is found to be smaller than most known oxide metals. The low-lying density of states is found to be in agreement with bulk-sensitive thermodynamic measurements for nonmagnetic dopings where the 2D Luttinger theorem is also observed to be satisfied.
Additional Information
© 2006 The American Physical Society. Received 28 June 2006. Published 3 November 2006. We acknowledge G. Khaliulin, G. Kotliar, B. Keimer, P. A. Lee, N. P. Ong, D. Singh, Z.Wang, and A. Fedorov for discussions. This work is primarily supported by DOE Grant No. DE-FG-02-05ER46200. R. J.C. acknowledges support by the NSF (DMR-0213706). N. L.W. acknowledges support by the NSFC (10574158).Attached Files
Published - PhysRevLett.97.186405.pdf
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PhysRevLett.97.186405.pdf
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Additional details
- Eprint ID
- 49309
- Resolver ID
- CaltechAUTHORS:20140908-085009835
- DE-FG-02-05ER46200
- Department of Energy (DOE)
- DMR-0213706
- NSF
- 10574158
- National Science Foundation of China (NSFC)
- Created
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2014-09-08Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field