High-Resolution Photoemission Study of UNi2Al3 and URu2Si2

See Hun Yang; Hiroshi Kumigashira; Takayoshi Yokoya; Ashishi Chainani; Takashi Takahashi; Se Jung Oh; Noriaki Sato; Takemi Komatsubara

doi:10.1143/JPSJ.65.2685

High-Resolution Photoemission Study of UNi₂Al₃ and URu₂Si₂

See Hun Yang, Hiroshi Kumigashira, Takayoshi Yokoya, Ashishi Chainani, Takashi Takahashi, Se Jung Oh, Noriaki Sato, Takemi Komatsubara

Division of Inorganic Material Research

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

High-resolution low-temperature photoemission spectroscopy has been performed for UNi₂Al₃ and URu₂Si₂ to study the nature of 5f electrons in U-based heavy fermion materials. Photoemission spectra of both compounds have a sharp peak at E_F and a large broad peak around 2 eV, while only UNi₂Al₃ exhibits an additional small broad feature at 0.6 eV. The two features in the vicinity of E_F (the E_F-peak and the small structure at 0.6 eV) are found to have a dominant U 5f character while the prominent peak around 2 eV is due to the Ni 3d or Ru 4d states. Comparison with the band structure calculations and experimental results on UPd₂Al₃ suggests that the E_F-peak is ascribed to itinerant U 5f electrons while the following broad feature at 0.6 eV represents localized f electrons.

Original language	English
Pages (from-to)	2685-2689
Number of pages	5
Journal	journal of the physical society of japan
Volume	65
Issue number	8
DOIs	https://doi.org/10.1143/JPSJ.65.2685
Publication status	Published - 1996

Keywords

5f electrons
Electronic structure
High-resolution photoemission spectroscopy
Uranium compounds

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.65.2685

Cite this

@article{4e757ce5c2814703850b2babb048bedd,

title = "High-Resolution Photoemission Study of UNi2Al3 and URu2Si2",

abstract = "High-resolution low-temperature photoemission spectroscopy has been performed for UNi2Al3 and URu2Si2 to study the nature of 5f electrons in U-based heavy fermion materials. Photoemission spectra of both compounds have a sharp peak at EF and a large broad peak around 2 eV, while only UNi2Al3 exhibits an additional small broad feature at 0.6 eV. The two features in the vicinity of EF (the EF-peak and the small structure at 0.6 eV) are found to have a dominant U 5f character while the prominent peak around 2 eV is due to the Ni 3d or Ru 4d states. Comparison with the band structure calculations and experimental results on UPd2Al3 suggests that the EF-peak is ascribed to itinerant U 5f electrons while the following broad feature at 0.6 eV represents localized f electrons.",

keywords = "5f electrons, Electronic structure, High-resolution photoemission spectroscopy, Uranium compounds",

author = "Yang, {See Hun} and Hiroshi Kumigashira and Takayoshi Yokoya and Ashishi Chainani and Takashi Takahashi and Oh, {Se Jung} and Noriaki Sato and Takemi Komatsubara",

note = "Funding Information: financials upportfr om KOSEF (Korea Sciencea nd EngineeringF oundation)T. his work was supported by grants from the NED0 and the Ministry of EducationS ciencea ndC ultureo f Japan.",

year = "1996",

doi = "10.1143/JPSJ.65.2685",

language = "English",

volume = "65",

pages = "2685--2689",

journal = "Journal of the Physical Society of Japan",

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publisher = "Physical Society of Japan",

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AU - Yang, See Hun

AU - Kumigashira, Hiroshi

AU - Yokoya, Takayoshi

AU - Chainani, Ashishi

AU - Takahashi, Takashi

AU - Oh, Se Jung

AU - Sato, Noriaki

AU - Komatsubara, Takemi

N1 - Funding Information: financials upportfr om KOSEF (Korea Sciencea nd EngineeringF oundation)T. his work was supported by grants from the NED0 and the Ministry of EducationS ciencea ndC ultureo f Japan.

PY - 1996

Y1 - 1996

N2 - High-resolution low-temperature photoemission spectroscopy has been performed for UNi2Al3 and URu2Si2 to study the nature of 5f electrons in U-based heavy fermion materials. Photoemission spectra of both compounds have a sharp peak at EF and a large broad peak around 2 eV, while only UNi2Al3 exhibits an additional small broad feature at 0.6 eV. The two features in the vicinity of EF (the EF-peak and the small structure at 0.6 eV) are found to have a dominant U 5f character while the prominent peak around 2 eV is due to the Ni 3d or Ru 4d states. Comparison with the band structure calculations and experimental results on UPd2Al3 suggests that the EF-peak is ascribed to itinerant U 5f electrons while the following broad feature at 0.6 eV represents localized f electrons.

AB - High-resolution low-temperature photoemission spectroscopy has been performed for UNi2Al3 and URu2Si2 to study the nature of 5f electrons in U-based heavy fermion materials. Photoemission spectra of both compounds have a sharp peak at EF and a large broad peak around 2 eV, while only UNi2Al3 exhibits an additional small broad feature at 0.6 eV. The two features in the vicinity of EF (the EF-peak and the small structure at 0.6 eV) are found to have a dominant U 5f character while the prominent peak around 2 eV is due to the Ni 3d or Ru 4d states. Comparison with the band structure calculations and experimental results on UPd2Al3 suggests that the EF-peak is ascribed to itinerant U 5f electrons while the following broad feature at 0.6 eV represents localized f electrons.

KW - 5f electrons

KW - Electronic structure

KW - High-resolution photoemission spectroscopy

KW - Uranium compounds

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