Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Valence instability in the bulk and at the surface of the antiferromagnet SmRh2Si2. / Chikina, A.; Generalov, A.; Kummer, K.; Guettler, M.; Antonov, V. N.; Kucherenko, Yu.; Kliemt, K.; Krellner, C.; Danzenbaecher, S.; Kim, T.; Dudin, P.; Geibel, C.; Laubschat, C.; Vyalikh, D. V.
в: Physical Review B, Том 95, № 15, 155127, 17.04.2017.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Valence instability in the bulk and at the surface of the antiferromagnet SmRh2Si2
AU - Chikina, A.
AU - Generalov, A.
AU - Kummer, K.
AU - Guettler, M.
AU - Antonov, V. N.
AU - Kucherenko, Yu.
AU - Kliemt, K.
AU - Krellner, C.
AU - Danzenbaecher, S.
AU - Kim, T.
AU - Dudin, P.
AU - Geibel, C.
AU - Laubschat, C.
AU - Vyalikh, D. V.
PY - 2017/4/17
Y1 - 2017/4/17
N2 - Using resonant angle-resolved photoemission spectroscopy and electron band-structure calculations, we explore the electronic structure and properties of Sm atoms at the surface and in the bulk of the antiferromagnet SmRh2Si2. We show that the Sm atoms reveal weak mixed-valent behavior both in the bulk and at the surface. Although trivalent 4 f emission strongly dominates, a small divalent 4 f signal near the Fermi energy can be clearly resolved for surface and bulk Sm atoms. This behavior is quite different to most other Sm-based materials which typically experience a surface valence transition to a divalent state of Sm atoms at the surface. This phenomenon is explained in analogy to the isostructural Ce compound, where strong 4 f hybridization stabilizes mixed-valent ground state both in the bulk and at the surface, and which were described in the light of the single-impurity Anderson model. Implications for other RERh2Si2 (RE = rare-earth elements) compounds are discussed.
AB - Using resonant angle-resolved photoemission spectroscopy and electron band-structure calculations, we explore the electronic structure and properties of Sm atoms at the surface and in the bulk of the antiferromagnet SmRh2Si2. We show that the Sm atoms reveal weak mixed-valent behavior both in the bulk and at the surface. Although trivalent 4 f emission strongly dominates, a small divalent 4 f signal near the Fermi energy can be clearly resolved for surface and bulk Sm atoms. This behavior is quite different to most other Sm-based materials which typically experience a surface valence transition to a divalent state of Sm atoms at the surface. This phenomenon is explained in analogy to the isostructural Ce compound, where strong 4 f hybridization stabilizes mixed-valent ground state both in the bulk and at the surface, and which were described in the light of the single-impurity Anderson model. Implications for other RERh2Si2 (RE = rare-earth elements) compounds are discussed.
KW - RARE-EARTH-METALS
KW - ELECTRONIC-STRUCTURE
KW - SAMARIUM HEXABORIDE
KW - BAND THEORY
KW - 4F
KW - SMB6
KW - ELECTRONEGATIVITY
KW - PHOTOEMISSION
KW - GDRH2SI2
KW - SPECTRA
U2 - 10.1103/PhysRevB.95.155127
DO - 10.1103/PhysRevB.95.155127
M3 - статья
VL - 95
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 15
M1 - 155127
ER -
ID: 9323052