Band structure and Fermi surface of heavy Fermion compounds Ce2TIn8 studied by angle-resolved photoemission spectroscopy

Souma, S.; Raj, Satyabrata; Campuzano, J. C.; Sato, Takafumi; Takahashi, Tadashi; Ohara, Shuichi; Sakamoto, Shunya

doi:10.1016/j.physb.2007.10.026

Cited by 5 publications

(5 citation statements)

References 7 publications

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“…To date, this was not been directly demonstrated by ARPES measurements because the data in Refs. 14,15 was acquired using a single photon energy, which probes only single surface in 3D momentum space. To verify the dimensionality of the electronic structure of this material we present extensive k z dispersion data measured using photon energies from 80 eV to 157 eV in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Due to the layered structure, the electronic properties of Ce 2 RhIn 8 are believed to be quasi-2D, which is rarely seen in heavy-fermion superconductors. ARPES data have been previously reported 14,15 for this compound but only along high symmetry directions. To the best of our knowledge there have been no reported measurements of the Fermi surface.…”

Section: Introductionmentioning

confidence: 83%

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Electronic structure ofCe2RhIn8: A two-dimensional heavy-fermion system studied by angle-resolved photoemission spectroscopy

Jiang¹,

Mou²,

Liu³

et al. 2015

Phys. Rev. B

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We use angle-resolved photoemission spectroscopy (ARPES) to study the 2D heavy fermion superconductor, Ce2RhIn8. The Fermi surface is rather complicated and consists of several hole and electron pockets with one of the sheets displaying strong nesting properties with a q-vector of (0.32, 0.32) π/a We do not observe kz dispersion of the Fermi sheets, which is consistent with the expected 2D character of the electronic structure. Comparison of the ARPES data to band structure calculations suggest that a localized picture of the f-electrons works best. While there is some agreement in the overall band dispersion and location of the Fermi sheets, the model does not reproduce all observed bands and is not completely accurate for those it does. Our data paves way for improving the band structure calculations and the general understanding of the transport and thermodynamical properties of this material.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 83%

Electronic structure ofCe2RhIn8: A two-dimensional heavy-fermion system studied by angle-resolved photoemission spectroscopy

Jiang¹,

Mou²,

Liu³

et al. 2015

Phys. Rev. B

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“…In this material, no superconducting or magnetic order was found down to 50 mK 32 , but a non-Fermi-liquid behavior was observed in applied magnetic fields 33 . For all three compounds, quantumoscillation measurements and/or angle-resolved photoemission spectroscopy revealed quasi-2D FSs 31,[34][35][36] .…”

Section: Introductionmentioning

confidence: 94%

Fermi-surface topology of the heavy-fermion system Ce2PtIn8

et al. 2018

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Ce2PtIn8 is a recently discovered heavy-fermion system structurally related to the well-studied superconductor CeCoIn5. Here, we report on low-temperature de Haas-van Alphen-effect measurements in high magnetic fields in Ce2PtIn8 and Pr2PtIn8. In addition, we performed band-structure calculations for localized and itinerant Ce-4f electrons in Ce2PtIn8. Comparison with the experimental data of Ce2PtIn8 and of the 4f -localized Pr2PtIn8 suggests the itinerant character of the Ce-4f electrons. This conclusion is further supported by the observation of effective masses in Ce2PtIn8, which are strongly enhanced with up to 26 bare electron masses.

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“…[18] Ce 2 RhIn 8 with a tetragonal crystal structure is an antiferromagnetic superconductor with two magnetic transitions at 𝑇 N = 2.8 and 𝑇 m = 1.65 K. [32,42] ARPES measurements suggested that the Ce 4𝑓 electrons are essentially localized. [26,43,44] CeCoIn 5 is a well-studied compound. Its low energy behavior is similar to that of the underdoped cuprates, with a relatively high 𝑇 c ≈ 2.3 K at ambient pressure.…”

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confidence: 99%

The 4f-Hybridization Strength in Ce_m M_n In_3m+2n Heavy-Fermion Compounds Studied by Angle-Resolved Photoemission Spectroscopy

Song¹,

Luo²,

Zhang³

et al. 2021

Chinese Phys. Lett.

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We systemically investigate the nature of Ce 4f electrons in structurally layered heavy-fermion compounds Ce m M n In3m + 2n (with M = Co, Rh, Ir, and Pt, m = 1, 2, n = 0–2), at low temperature using on-resonance angle-resolved photoemission spectroscopy. Three heavy quasiparticle bands f 0, f 7 / 2 1 and f 5 / 2 1 , are observed in all compounds, whereas their intensities and energy locations vary greatly with materials. The strong f 0 states imply that the localized electron behavior dominates the Ce 4f states. The Ce 4f electrons are partially hybridized with the conduction electrons, making them have the dual nature of localization and itinerancy. Our quantitative comparison reveals that the f 5 / 2 1 –f 0 intensity ratio is more suitable to reflect the 4f-state hybridization strength.

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Band structure and Fermi surface of heavy Fermion compounds Ce2TIn8 studied by angle-resolved photoemission spectroscopy

Cited by 5 publications

References 7 publications

Electronic structure ofCe2RhIn8: A two-dimensional heavy-fermion system studied by angle-resolved photoemission spectroscopy

Electronic structure ofCe2RhIn8: A two-dimensional heavy-fermion system studied by angle-resolved photoemission spectroscopy

Fermi-surface topology of the heavy-fermion system Ce2PtIn8

The 4f-Hybridization Strength in Ce_m M_n In_3m+2n Heavy-Fermion Compounds Studied by Angle-Resolved Photoemission Spectroscopy

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Band structure and Fermi surface of heavy Fermion compounds Ce2TIn8 studied by angle-resolved photoemission spectroscopy

Cited by 5 publications

References 7 publications

Electronic structure ofCe2RhIn8: A two-dimensional heavy-fermion system studied by angle-resolved photoemission spectroscopy

Electronic structure ofCe2RhIn8: A two-dimensional heavy-fermion system studied by angle-resolved photoemission spectroscopy

Fermi-surface topology of the heavy-fermion system Ce2PtIn8

The 4f-Hybridization Strength in Ce m Mn In3m+2n Heavy-Fermion Compounds Studied by Angle-Resolved Photoemission Spectroscopy

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The 4f-Hybridization Strength in Ce_m M_n In_3m+2n Heavy-Fermion Compounds Studied by Angle-Resolved Photoemission Spectroscopy