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Abstract Details

ARPES Investigations of Fermi Surface and Phase Transitions in CaRu2O7

SpeakerFelix Baumberger (Stanford University)
Full Author ListF. Baumberger (1), N.J.C. Ingle (2), W. Meevasana (3), K.M. Shen (1), D.H. Lu (4), S. Hossain (2), A. Damascelli (2), Z.-X. Shen (1,3,4), (none) (0), (none) (0)
Affiliations1. Department of Applied Physics, Stanford University, Stanford, CA, USA,
2. Department of Physics and Astronomy, University of British Columbia, Vancouver, Canada,
3. Department of Physics, Stanford University, Stanford, CA, USA,
4. Stanford Synchrotron Radiation Laboratory, SLAC, Stanford University, Stanford, CA, USA,
5. (none),
6. (none),
7. (none),
8. (none),
9. (none),
10. (none)
CategoryMaterials Science
Abstract

We present a high-resolution angular resolved photoemission study of the bilayer ruthenium oxide Ca3Ru2O7. A complete momentum space mapping reveals for the first time the existence of well defined quasi-particle excitations in the low temperature metallic phase of Ca3Ru2O7. At the first order bulk phase transition temperature of 48°K, large parts of the Fermi surface become gapped with a maximum gap size of 9 meV. Peculiarities of the spectral function, like the very small weight of the coherent quasi-particle will be discussed by comparing our results with spectra from the more thoroughly characterized Sr3Ru2O7.

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