High-Energy Anomaly in the Band Dispersion of the Ruthenate Superconductor
Use this link to cite this item : https://ir.lib.hiroshima-u.ac.jp/00033917
ID | 33917 |
file | |
creator |
Yoshida, Yoshiyuki
Hase, Izumi
Aiura, Yoshihiro
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NDC |
Physics
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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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journal title |
Physical Review Letters
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volume | Volume 109
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issue | Issue 6
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start page | 066404
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date of issued | 2012
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publisher | American Physical Society
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issn | 0031-9007
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ncid | |
publisher doi | |
language |
eng
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nii type |
Journal Article
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HU type |
Journal Articles
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DCMI type | text
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format | application/pdf
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text version | publisher
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rights | (c) 2012 American Physical Society
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relation url | |
department |
Graduate School of Science
Hiroshima Synchrotron Radiation Center
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