Revealing the hidden heavy Fermi liquid in CaRuO3
Revealing the hidden heavy Fermi liquid in CaRuO3
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揭示 CaRuO3 中隐藏的重费米液体
DOI:
10.1103/physrevb.98.041110
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发表时间:
2018-07
影响因子:
3.7
通讯作者:
Shen Kyle M.
中科院分区:
文献类型:
--
作者:
Liu Yang;Nair Hari P.;Ruf Jacob P.;Schlom Darrell G.;Shen Kyle M.
The perovskite ruthenate has attracted considerable interest due to reports of possible non-Fermi-liquid behavior and its proximity to a magnetic quantum critical point, yet its ground state and electronic structure remain enigmatic. Here we report the first measurements of the Fermi surface and quasiparticle dispersion in CaRuO3 through a combination of oxide molecular beam epitaxy and in situ angle-resolved photoemission spectroscopy. Our results reveal a complex and anisotropic Fermi surface consisting of small electron pockets and straight segments, consistent with the bulk orthorhombic crystal structure with large octahedral rotations. We observe a strongly band-dependent mass renormalization, with prominent heavy quasiparticle bands which lie close to the Fermi energy and exhibit strong temperature dependence. These results are consistent with a heavy Fermi liquid with a complex Fermiology and small hybridization gaps near the Fermi energy. Our results provide a unified framework for explaining previous experimental results on CaRuO3, such as its unusual optical conductivity, and demonstrate the importance of octahedral rotations in determining the quasiparticle band structure, and electron correlations in complex transition metal oxides.
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DOI:
10.1088/0004-637x/766/2/114
发表时间:
2002
期刊:
The Astrophysical Journal
影响因子:
--
作者:
Nir S. Kampel
通讯作者:
Nir S. Kampel
DOI:
10.1107/s0567740872007976
发表时间:
1972-01-01
期刊:
ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE
影响因子:
--
作者:
GLAZER, AM
通讯作者:
GLAZER, AM
影响因子:
41.2
作者:
Monkman, Eric J.;Adamo, Carolina;Shen, Kyle M.
通讯作者:
Shen, Kyle M.
影响因子:
3.7
作者:
Gausepohl, SC;Lee, M;Eom, CB
通讯作者:
Eom, CB
影响因子:
8.6
作者:
Capogna, L;Mackenzie, AP;Maeno, Y
通讯作者:
Maeno, Y