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  Evolution of the Fermi Surface and Quasiparticle Renormalization through a van Hove Singularity in Sr2−yLayRuO4

Shen, K. M., Kikugawa, N., Bergemann, C., Balicas, L., Baumberger, F., Meevasana, W., et al. (2007). Evolution of the Fermi Surface and Quasiparticle Renormalization through a van Hove Singularity in Sr2−yLayRuO4. Physical Review Letters, 99(18): 187001, pp. 1-4. doi:10.1103/PhysRevLett.99.187001.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0018-F1FB-9 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0018-F200-4
Genre: Journal Article

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 Creators:
Shen, K. M.1, Author
Kikugawa, N.1, Author
Bergemann, C.1, Author
Balicas, L.1, Author
Baumberger, F.1, Author
Meevasana, W.1, Author
Ingle, N. J. C.1, Author
Maeno, Y.1, Author
Shen, Z. -X.1, Author
Mackenzie, A. P.2, Author              
Affiliations:
1external, ou_persistent22              
2External Organizations, ou_persistent22              

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 Abstract: We employ a combination of chemical substitution and angle resolved photoemission spectroscopy to prove that the Fermi level in the gamma band of Sr2-gamma La gamma RuO4 can be made to traverse a van Hove singularity. Remarkably, the large mass renormalization has little dependence on either k or doping. By combining the results from photoemission with thermodynamic measurements on the same batches of crystals, we deduce a parametrization of the full many-body quasiparticle dispersion in Sr2RuO4 which extends from the Fermi level to approximately 20 meV above it.

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 Dates: 2007-10-29
 Publication Status: Published in print
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Title: Physical Review Letters
  Other : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 99 (18) Sequence Number: 187001 Start / End Page: 1 - 4 Identifier: ISSN: 0031-9007
CoNE: /journals/resource/954925433406_1