Para- to antiferro-magnetic phase transition of CeSb studied by ultrahigh-resolution angle-resolved photoemission spectroscopy

Ito, Takahiro; Kimura, S.; Kitazawa, Hideaki

doi:10.1016/j.physb.2004.06.022

Cited by 9 publications

(15 citation statements)

References 8 publications

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“…In this study, we use laser-based ARPES to directly visualize the electronic structures of CeSb developing through the devil's staircase. In contrast to the previous reports [31][32][33][34] , the high-energy resolution and bulk-sensitivity achieved by utilizing a low-energy laser source (hν = 7 eV) 35 enables us to obtain high-quality spectra, which now unravels the significant reconstruction of the itinerant bands. The response of conducting bands to the 4f order is sensitively changed at each distinct transition of the devil's staircase, and it exposes the strong electronic anisotropy across T N .…”

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confidence: 91%

“…Momentum-resolved spectral function obtained by angleresolved photoemission spectroscopy (ARPES) 29 should be an ideal probe to reveal the compatible transitions of the electronic structure and spectral transfer related to underlying electronic instability 30 . However, in earlier ARPES reports [31][32][33][34] , no systematic investigation over the devil's staircase particularly for the transitional AFP phases has been reported, and hence no correspondence for the devil's staircase has been achieved so far.…”

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confidence: 99%

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Devil's staircase transition of the electronic structures in CeSb

et al. 2020

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Solids with competing interactions often undergo complex phase transitions with a variety of long-periodic modulations. Among such transition, devil's staircase is the most complex phenomenon, and for it, CeSb is the most famous material, where a number of the distinct phases with long-periodic magnetostructures sequentially appear below the Néel temperature. An evolution of the low-energy electronic structure going through the devil's staircase is of special interest, which has, however, been elusive so far despite 40 years of intense research. Here, we use bulk-sensitive angle-resolved photoemission spectroscopy and reveal the devil's staircase transition of the electronic structures. The magnetic reconstruction dramatically alters the band dispersions at each transition. Moreover, we find that the well-defined band picture largely collapses around the Fermi energy under the long-periodic modulation of the transitional phase, while it recovers at the transition into the lowesttemperature ground state. Our data provide the first direct evidence for a significant reorganization of the electronic structures and spectral functions occurring during the devil's staircase.

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Devil's staircase transition of the electronic structures in CeSb

et al. 2020

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“…4(c)], the two Dirac-cone bands again disappear and a single Dirac-cone band recovers. In contrast, the holelike Bi-6p bulk band shows no discernible band reconstruction even across T AFII (note that this band is gradually pushed up on lowering temperature likely due to p-f mixing as reported in CeSb [9][10][11][12]; see Appendix A for detailed temperature dependence of the bulk bands). To the best of our knowledge, the present result is the first experimental observation of the antiferromagnetism-induced drastic reconstruction of the Dirac-cone SS.…”

Section: Resultsmentioning

confidence: 93%

Unusual change in the Dirac-cone energy band upon a two-step magnetic transition in CeBi

et al. 2019

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We have performed angle-resolved photoemission spectroscopy (ARPES) on CeBi which undergoes a two-step antiferromagnetic (AF) transition with temperature. Soft-x-ray ARPES has revealed the inverted band structure at the X point of bulk Brillouin zone for CeBi (and also for LaBi) as opposed to LaSb with non-inverted band structure. Low-energy ARPES on CeBi has revealed the Dirac-cone band at theΓ point in the paramagnetic phase associated with the bulk band inversion. On the other hand, a double Dirac-cone band appears on entering the first AF phase at T = 25 K, whereas a single Dirac-cone band recovers below the second AF transition at T = 14 K. The present result suggests an intricate interplay between antiferromagnetism and topological surface states in CeBi.

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“…10. [34][35][36] The main purpose in this study is to demonstrate that the 3D FS of CeSb in the paramagnetic phase can be elucidated by using the SAMRAI beamline. In the measurement, frequently used parameters for angle-integrated photoemission measurements ͑horizontal planar polarization, monochromator slit size of 50 m, analyzer pass energy of 2 eV, analyzer slit size of 0.2 mm, and spatial mode͒ are adopted.…”

Section: A Energy Resolution Of Photoemission Spectroscopy At the Samentioning

confidence: 99%

SAMRAI: A novel variably polarized angle-resolved photoemission beamline in the VUV region at UVSOR-II

Kimura

Ito

Sakai

et al. 2010

Review of Scientific Instruments

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A novel variably polarized angle-resolved photoemission spectroscopy beamline in the vacuum-ultraviolet (VUV) region has been installed at the UVSOR-II 750 MeV synchrotron light source. The beamline is equipped with a 3 m long APPLE-II type undulator with horizontally/vertically linear and right/left circular polarizations, a 10 m Wadsworth type monochromator covering a photon energy range of 6-43 eV, and a 200 mm radius hemispherical photoelectron analyzer with an electron lens of a +/-18 degrees acceptance angle. Due to the low emittance of the UVSOR-II storage ring, the light source is regarded as an entrance slit, and the undulator light is directly led to a grating by two plane mirrors in the monochromator while maintaining a balance between high-energy resolution and high photon flux. The energy resolving power (hnu/Deltahnu) and photon flux of the monochromator are typically 1 x 10(4) and 10(12) photons/s, respectively, with a 100 microm exit slit. The beamline is used for angle-resolved photoemission spectroscopy with an energy resolution of a few meV covering the UV-to-VUV energy range.

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Para- to antiferro-magnetic phase transition of CeSb studied by ultrahigh-resolution angle-resolved photoemission spectroscopy

Cited by 9 publications

References 8 publications

Devil's staircase transition of the electronic structures in CeSb

Devil's staircase transition of the electronic structures in CeSb

Unusual change in the Dirac-cone energy band upon a two-step magnetic transition in CeBi

SAMRAI: A novel variably polarized angle-resolved photoemission beamline in the VUV region at UVSOR-II

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