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Title: Electronic structure of R Sb ( R = Y , Ce, Gd, Dy, Ho, Tm, Lu) studied by angle-resolved photoemission spectroscopy

Journal Article · · Physical Review B
 [1];  [2];  [3];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)
  2. Ames Lab., Ames, IA (United States)
  3. Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States); Princeton Univ., Princeton, NJ (United States)

Here, we use high-resolution angle-resolved photoemission spectroscopy (ARPES) and electronic structure calculations to study the electronic properties of rare-earth monoantimonides RSb (R = Y, Ce, Gd, Dy, Ho, Tm, Lu). The experimentally measured Fermi surface (FS) of RSb consists of at least two concentric hole pockets at the Γ point and two intersecting electron pockets at the X point. These data agree relatively well with the electronic structure calculations. Detailed photon energy dependence measurements using both synchrotron and laser ARPES systems indicate that there is at least one Fermi surface sheet with strong three-dimensionality centered at the Γ point. Due to the “lanthanide contraction”, the unit cell of different rare-earth monoantimonides shrinks when changing the rare-earth ion from CeSb to LuSb. This results in the differences in the chemical potentials in these compounds, which are demonstrated by both ARPES measurements and electronic structure calculations. Interestingly, in CeSb, the intersecting electron pockets at the X point seem to be touching the valence bands, forming a fourfold-degenerate Dirac-like feature. On the other hand, the remaining rare-earth monoantimonides show significant gaps between the upper and lower bands at the X point. Furthermore, similar to the previously reported results of LaBi, a Dirac-like structure was observed at the Γ point in YSb, CeSb, and GdSb, compounds showing relatively high magnetoresistance. This Dirac-like structure may contribute to the unusually large magnetoresistance in these compounds.

Research Organization:
Ames Lab., Ames, IA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-07CH11358; DMR-1420451
OSTI ID:
1374739
Alternate ID(s):
OSTI ID: 1371953
Report Number(s):
IS-J-9407; PRBMDO
Journal Information:
Physical Review B, Vol. 96, Issue 3; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 33 works
Citation information provided by
Web of Science

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Cited By (15)

Orbital-flop Induced Magnetoresistance Anisotropy in Rare Earth Monopnictide CeSb journal June 2019
Fermi surface topology and magnetotransport in semimetallic LuSb journal October 2017
Bulk band inversion and surface Dirac cones in LaSb and LaBi: Prediction of a new topological heterostructure journal October 2018
Tunable electronic structure and topological properties of LnPn (Ln=Ce, Pr, Sm, Gd, Yb; Pn=Sb, Bi) journal November 2018
Extreme magnetoresistance and Shubnikov-de Haas oscillations in ferromagnetic DySb journal August 2018
Revealing ‘plasmaron’ feature in DySb by optical spectroscopy study journal July 2019
Optical spectroscopy study of the topological property in PrSb journal September 2019
Direct visualization of coexisting channels of interaction in CeSb journal March 2019
Extreme Magnetoresistance in Magnetic Rare Earth Monopnictides text January 2017
Bulk band inversion and surface Dirac cones in LaSb and LaBi : Prediction of a new topological heterostructure text January 2017
Direct visualization of coexisting channels of interaction in CeSb preprint January 2017
Magnetoresistance in YBi and LuBi semimetals due to nearly perfect carrier compensation text January 2017
Tunable Electronic Structure and Surface States in Rare Earth Mono-Bismuthides with Partially Filled f Shell text January 2018
Tunable Electronic Structure and Topological Properties of $LnPn$ ($Ln$=Ce, Pr, Gd, Sm, Yb; $Pn$=Sb, Bi) text January 2018
Unusual change in the Dirac-cone energy band upon two-step magnetic transition in CeBi text January 2019

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