Fermi Surface Properties in Sr2RuO4

Yoshida, Yoshiyuki; Mukai, Atsushi; Settai, Rikio; Miyake, Koji; Inada, Yuji; Ōnuki, Yoshichika; Betsuyaku, Kiyoshi; Harima, Hisatomo; Matsuda, Tatsuma D.; Aoki, Yuji; Sato, Hideyuki

doi:10.1143/jpsj.68.3041

Cited by 30 publications

(27 citation statements)

References 21 publications

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“…High-quality Sr 2 RuO 4 single crystals were grown by the floating zone method with a self-flux technique, resulting in a sharp superconducting transition at T c ∼1.36 K. 22,23,24 Figure. 1 shows the FSs of Sr 2 RuO 4 , recorded at a high-resolution and high-flux undulator beamline (BL-28) of the Photon Factory. Since the FSs are consistent with the LDA band-structure calculation 19 (white lines) and the previous ARPES result, 16 the quality of our samples should be high enough to investigate detailed band dispersions.…”

Section: Methodsmentioning

confidence: 99%

Orbital selectivity of the kink in the dispersion ofSr2RuO4

et al. 2005

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We present detailed energy dispersions near the Fermi level on the monolayer perovskite ruthenate Sr2RuO4, determined by high-resolution angle-resolved photoemission spectroscopy. An orbital selectivity of the kink in the dispersion of Sr2RuO4 has been found: A kink for the Ru 4dxy orbital is clearly observed, but not for the Ru 4dyz and 4dzx ones. The result provides insight into the origin of the kink.

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Section: Methodsmentioning

confidence: 99%

Orbital selectivity of the kink in the dispersion ofSr2RuO4

et al. 2005

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“…The second harmonic is extracted by fitting and subtracting from the data an unconstrained sum of four low frequencies (F < 700T), similar to those earlier reported in references 6,7,9,10, and a slowly varying aperiodic background (fit procedure shown in Methods). From the analysis of the measured second harmonic oscillations, we present the surprising finding that the harmonic content in underdoped YBa 2 Cu 3 O 6 + x (x = 0.56) arises from oscillations of the chemical potential, which are enhanced compared to normal metals by the quasi-two-dimensional topology of the Fermi surface 17,[21][22][23][24] . Oscillatory features corresponding to multiple frequencies in 1/B previously reported 3,6,7,9 are observed: (F α = 535(5) T, F γ1 = 440(10) T, F γ2 = 610(20) T) down to 22 T, and F β = 1,550(50) T at the lowest temperatures 1 K (to be presented elsewhere); yet, we conclude, from the magnitude and phase of the second harmonic with respect to the fundamental oscillations, that the Fermi surface consists chiefly of a single carrier pocket, the multiple frequency components arising from effects of finite c-axis dispersion, bilayer splitting, and magnetic breakdown.…”

mentioning

confidence: 95%

Chemical potential oscillations from nodal Fermi surface pocket in the underdoped high-temperature superconductor YBa2Cu3O6+x

Sebastian¹,

Harrison²,

Altarawneh³

et al. 2011

Nat Commun

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The electronic structure of the normal state of the underdoped cuprates has thus far remained mysterious, with neither the momentum space location nor the charge carrier type of constituent small Fermi surface pockets being resolved. Whereas quantum oscillations have been interpreted in terms of a nodal-antinodal Fermi surface including electrons at the antinodes, photoemission indicates a solely nodal density-of-states at the Fermi level. Here we examine both these possibilities using extended quantum oscillation measurements. second harmonic quantum oscillations in underdoped YBa 2 Cu 3 o 6 + x are shown to arise chiefly from oscillations in the chemical potential. We show from the relationship between the phase and amplitude of the second harmonic with that of the fundamental quantum oscillations that there exists a single carrier Fermi surface pocket, likely located at the nodal region of the Brillouin zone, with the observed multiple frequencies arising from warping, bilayer splitting and magnetic breakdown.

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“…In that case,M N (N, H) should be calculated from Eq. (27) with numerically solvedμ(N, H) in Eq. (24).…”

Section: Two-dimensional Electronsmentioning

confidence: 99%

“…In order to take in the sharpness of the oscillation at the very low temperature, we set the upper limit of r in Eqs. (24) and (27) as 75 below T /µ 0 = 0.00003. The T -dependence of the FTI is given by R 2 T,jr (Eq.…”

Section: Two-dimensional Electronsmentioning

confidence: 99%

de Haas–van Alphen effect in two-dimensional and quasi-two-dimensional systems

Kishigi

Hasegawa

2002

Phys. Rev. B

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We study the de Haas-van Alphen (dHvA) oscillation in two-dimensional and quasi-two-dimensional systems. We give a general formula of the dHvA oscillation in two-dimensional multi-band systems. By using this formula, the dHvA oscillation and its temperature-dependence for the twoband system are shown. By introducing the interlayer hopping tz, we examine the crossover from the two-dimension, where the oscillation of the chemical potential plays an important role in the magnetization oscillation, to the three-dimension, where the oscillation of the chemical potential can be neglected as is well know as the Lifshitz and Kosevich formula. The crossover is seen at 4tz ∼ 8tabH/φ0, where a and b are lattice constants, φ0 is the flux quantum and 8t is the width of the total energy band. We also study the dHvA oscillation in quasi-two-dimensional magnetic breakdown systems. The quantum interference oscillations such as β-α oscillation as well as the fundamental oscillations are suppressed by the interlayer hopping tz, while the β+α oscillation gradually increases as tz increases and it has a maximum at tz/t ≈ 0.025. This interesting dependence on the dimensionality can be observed in the quasi-two-dimensional organic conductors with uniaxial pressure.

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Fermi Surface Properties in Sr₂RuO₄

Cited by 30 publications

References 21 publications

Orbital selectivity of the kink in the dispersion ofSr2RuO4

Orbital selectivity of the kink in the dispersion ofSr2RuO4

Chemical potential oscillations from nodal Fermi surface pocket in the underdoped high-temperature superconductor YBa2Cu3O6+x

de Haas–van Alphen effect in two-dimensional and quasi-two-dimensional systems

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