High-Energy Anomaly in the Band Dispersion of the Ruthenate Superconductor
Physical Review Letters Volume 109 Issue 6
Page 066404-
published_at 2012
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| File | |
| Title ( eng ) |
High-Energy Anomaly in the Band Dispersion of the Ruthenate Superconductor
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| Creator |
Yoshida Yoshiyuki
Hase Izumi
Aiura Yoshihiro
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| Source Title |
Physical Review Letters
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| Volume | 109 |
| Issue | 6 |
| Start Page | 066404 |
| Abstract |
We reveal a “high-energy anomaly" (HEA) in the band dispersion of the unconventional ruthenate superconductor Sr2RuO4, by means of high-resolution angle-resolved photoemission spectroscopy (ARPES) with tunable energy and polarization of incident photons. This observation provides another class of correlated materials exhibiting this anomaly beyond high-Tc cuprates. We demonstrate that two distinct types of band renormalization associated with and without the HEA occur as a natural consequence of the energetics in the bandwidth and the energy scale of the HEA. Our results are well reproduced by a simple analytical form of the self-energy based on the Fermi-liquid theory, indicating that the HEA exists at a characteristic energy scale of the multielectron excitations. We propose that the HEA universally emerges if the systems have such a characteristic energy scale inside of the bandwidth.
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| NDC |
Physics [ 420 ]
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| Language |
eng
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| Resource Type | journal article |
| Publisher |
American Physical Society
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| Date of Issued | 2012 |
| Rights |
(c) 2012 American Physical Society
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| Publish Type | Version of Record |
| Access Rights | open access |
| Source Identifier |
[ISSN] 0031-9007
[DOI] 10.1103/PhysRevLett.109.066404
[NCID] AA00773679
[DOI] http://dx.doi.org/10.1103/PhysRevLett.109.066404
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