Rigid-band shift of the Fermi level in the strongly correlated metal: Sr2-yLayRuO4

N  Kikugawa; A P  Mackenzie; C  Bergemann; R A  Borzi; S A  Grigera; Y  Maeno

doi:10.1103/PhysRevB.70.060508

Rigid-band shift of the Fermi level in the strongly correlated metal: Sr_2-yLa_yRuO₄

N Kikugawa, A P Mackenzie, C Bergemann, R A Borzi, S A Grigera, Y Maeno

Research output: Contribution to journal › Article › peer-review

Abstract

We report a systematic study of electron doping of Sr2RuO4 by nonisovalent substitution of La3+ for Sr2+. Using a combination of de Haas-van Alphen oscillations, specific heat, and resistivity measurements, we show that electron doping leads to a rigid-band shift of the Fermi level corresponding to one doped electron per La ion, with constant many-body quasiparticle mass enhancement over the band mass. The susceptibility spectrum is substantially altered and enhanced by the doping but this has surprisingly little effect on the strength of the unconventional superconducting pairing.

Original language	English
Article number	060508
Number of pages	4
Journal	Physical Review. B, Condensed matter and materials physics
Volume	70
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevB.70.060508
Publication status	Published - Aug 2004

Keywords

SPIN-TRIPLET SUPERCONDUCTIVITY
LAYERED PEROVSKITE
SR2RUO4
SURFACE
STATE

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10.1103/PhysRevB.70.060508

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title = "Rigid-band shift of the Fermi level in the strongly correlated metal: Sr2-yLayRuO4",

abstract = "We report a systematic study of electron doping of Sr2RuO4 by nonisovalent substitution of La3+ for Sr2+. Using a combination of de Haas-van Alphen oscillations, specific heat, and resistivity measurements, we show that electron doping leads to a rigid-band shift of the Fermi level corresponding to one doped electron per La ion, with constant many-body quasiparticle mass enhancement over the band mass. The susceptibility spectrum is substantially altered and enhanced by the doping but this has surprisingly little effect on the strength of the unconventional superconducting pairing.",

keywords = "SPIN-TRIPLET SUPERCONDUCTIVITY, LAYERED PEROVSKITE, SR2RUO4, SURFACE, STATE",

author = "N Kikugawa and Mackenzie, {A P} and C Bergemann and Borzi, {R A} and Grigera, {S A} and Y Maeno",

year = "2004",

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doi = "10.1103/PhysRevB.70.060508",

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journal = "Physical Review. B, Condensed matter and materials physics",

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T1 - Rigid-band shift of the Fermi level in the strongly correlated metal: Sr2-yLayRuO4

AU - Kikugawa, N

AU - Mackenzie, A P

AU - Bergemann, C

AU - Borzi, R A

AU - Grigera, S A

AU - Maeno, Y

PY - 2004/8

Y1 - 2004/8

N2 - We report a systematic study of electron doping of Sr2RuO4 by nonisovalent substitution of La3+ for Sr2+. Using a combination of de Haas-van Alphen oscillations, specific heat, and resistivity measurements, we show that electron doping leads to a rigid-band shift of the Fermi level corresponding to one doped electron per La ion, with constant many-body quasiparticle mass enhancement over the band mass. The susceptibility spectrum is substantially altered and enhanced by the doping but this has surprisingly little effect on the strength of the unconventional superconducting pairing.

AB - We report a systematic study of electron doping of Sr2RuO4 by nonisovalent substitution of La3+ for Sr2+. Using a combination of de Haas-van Alphen oscillations, specific heat, and resistivity measurements, we show that electron doping leads to a rigid-band shift of the Fermi level corresponding to one doped electron per La ion, with constant many-body quasiparticle mass enhancement over the band mass. The susceptibility spectrum is substantially altered and enhanced by the doping but this has surprisingly little effect on the strength of the unconventional superconducting pairing.

KW - SPIN-TRIPLET SUPERCONDUCTIVITY

KW - LAYERED PEROVSKITE

KW - SR2RUO4

KW - SURFACE

KW - STATE

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DO - 10.1103/PhysRevB.70.060508

M3 - Article

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VL - 70

JO - Physical Review. B, Condensed matter and materials physics

JF - Physical Review. B, Condensed matter and materials physics

IS - 6

M1 - 060508

ER -

Rigid-band shift of the Fermi level in the strongly correlated metal: Sr_2-yLa_yRuO₄

Abstract

Keywords

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