Quasi-two-dimensional Fermi surfaces and the de Haas-van Alphen oscillation in both the normal and superconducting mixed states of CeCoIn<sub>5</sub>

Settai, Rikio; Shishido, Hiroaki; Ikeda, Shugo; Murakawa, Yohko; Nakashima, Miho; Aoki, Dai; Haga, Yoshinori; Harima, Hisatomo; Ōnuki, Yoshichika

doi:10.1088/0953-8984/13/27/103

Cited by 270 publications

(360 citation statements)

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“…The β 1 and β 2 frequencies can be assigned to orbits of a complicated multiconnected Fermi surface with strongly renormalized heavy masses. 34 As mentioned, the sample with x = 0.2 reveals dHvA frequencies composed of both kinds of Fermi-surface topologies.…”

Section: Resultsmentioning

confidence: 69%

“…A likely candidate might be the band that gives rise to the complicated multiconnected Fermi surface resulting in the β orbits in CeCoIn 5 . 34 For both of these orbits, β 1 and β 2 , we find effective masses of about 53m e at 13 T and 010 = 7 • . For x = 0.1, we estimate an effective mass of about 26m e for the β 2 orbit [ Fig.…”

Section: Resultsmentioning

confidence: 73%

“…34,35 This reflects that Kondo physics is relevant and that possibly quantum critical fluctuations also play a role.…”

Section: Resultsmentioning

confidence: 92%

“…For the latter, the strongest spectral peaks are labeled α 1 to α 3 according to the assignment of earlier studies to which we find very good agreement both in the dHvA frequencies as well as in the effective masses (discussed below). 34,35 In our measurements up to 20 T, we could just barely resolve dHvA signals for Ce 0.9 Yb 0.1 CoIn 5 [inset of Figs. 1 and 2(a)] and no oscillations for the samples with Yb concentrations of x = 0.2, 0.3, and 0.5.…”

Section: Resultsmentioning

confidence: 95%

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Fermi-surface evolution in Yb-substituted CeCoIn5

et al. 2012

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We report results of systematic de Haas-van Alphen (dHvA) studies on Ce 1−x Yb x CoIn 5 single crystals with varying Yb concentration. For x = 0.1, the well-known Fermi surfaces and the heavy effective masses of CeCoIn 5 (x = 0) have changed only slightly. We start to observe changes of the Fermi-surface topology at x = 0.2 leading to a drastic reconstruction above x = 0.55. At these concentrations, the effective masses are reduced considerably to values between 0.7 and 2.6 free electron masses. For both YbCoIn 5 and CeCoIn 5 , the angular-resolved dHvA frequencies can be very well described by conventional density-functional theory calculations. Projection of the Bloch states onto atomic Yb-4f orbitals yields a 4f occupation of 13.7 electrons, in agreement with previous experimental results indicating an intermediate Yb valence of +2.3.

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Section: Resultsmentioning

confidence: 69%

Section: Resultsmentioning

confidence: 73%

“…34,35 This reflects that Kondo physics is relevant and that possibly quantum critical fluctuations also play a role.…”

Section: Resultsmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 95%

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Fermi-surface evolution in Yb-substituted CeCoIn5

et al. 2012

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“…The unusual properties of CeCoIn 5 have been investigated by various experiments such as specific heat [2,[4][5][6], magnetic susceptibility [5,7], resistivity [3,8], thermal conductivity [4], NMR T 1 measurement [9,10], and de Haas-van Alphen (dHvA) [8,11]. These results suggest an unconventional superconductivity in this complex compound.…”

mentioning

confidence: 99%

Effect of Disorder Induced by Heavy-Ion Irradiation on CeCoIn5 Superconductivity

Kim

Bedorf²,

Stewart

2009

J Low Temp Phys

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We present a study of the effect of heavy-ion irradiation on a thinned single crystal of the unconventional heavy fermion superconductor CeCoIn 5 . Magnetic susceptibility and low-temperature specific heat results show that the superconducting transition temperature (T c ) changed only 4% with irradiation of 1 × 10 12 ions/cm 2 , Energy = 1 GeV, while the specific heat jump at T c , C, divided by C n , where C n is the normal state specific heat just above T c , was reduced to 3.6 from C/C n = 4.5 for unirradiated CeCoIn 5 . The increase of low-temperature magnetic susceptibility and the saturation in magnetization suggest that the defects induced by heavy-ion irradiation are magnetic in nature, as was seen in the case of neutron irradiation on the heavy fermion superconductors, UBe 13 and UPt 3 . The non-Fermi liquid behavior of the irradiated sample, based on the temperature dependence of the low temperature magnetic susceptibility, is significantly altered.

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Neutron diffraction studies on heavy fermion superconducting and antiferromagnetic compounds CeRh_1–xCo_x In₅

Ohira‐Kawamura

Kawano-Furukawa

Shishido

et al. 2009

Physica Status Solidi (a)

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CeCoIn5 is a heavy fermion superconductor with the transition temperature Tc = 2.3 K, while in a related material CeRhIn5 the superconductivity is highly suppressed and an incommensurate antiferromagnetic (AFM) order characterized by the propagation vector qh = (1/2, 1/2, 0.297) appears below TN = 3.8 K. From the elastic neutron diffraction measurements on mixed compounds CeRh1–x Cox In5, it was found that the superconductivity is strongly suppressed by the incommensurate AFM order while it coexists with the commensurate AFM order with qc = (1/2, 1/2, 1/2) in the intermediate x region. This is in sharp contrast to the CeRh1–x Irx In5 system, where both the commensurate and incommensurate AFM orders coexist with the superconductivity. These results reveal that particular areas on the Fermi surface nested by qh play an active role in forming the superconducting state in CeCoIn5. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Quasi-two-dimensional Fermi surfaces and the de Haas-van Alphen oscillation in both the normal and superconducting mixed states of CeCoIn₅

Cited by 270 publications

References 11 publications

Fermi-surface evolution in Yb-substituted CeCoIn5

Fermi-surface evolution in Yb-substituted CeCoIn5

Effect of Disorder Induced by Heavy-Ion Irradiation on CeCoIn5 Superconductivity

Neutron diffraction studies on heavy fermion superconducting and antiferromagnetic compounds CeRh_1–xCo_x In₅

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Quasi-two-dimensional Fermi surfaces and the de Haas-van Alphen oscillation in both the normal and superconducting mixed states of CeCoIn5

Cited by 270 publications

References 11 publications

Fermi-surface evolution in Yb-substituted CeCoIn5

Fermi-surface evolution in Yb-substituted CeCoIn5

Effect of Disorder Induced by Heavy-Ion Irradiation on CeCoIn5 Superconductivity

Neutron diffraction studies on heavy fermion superconducting and antiferromagnetic compounds CeRh1–xCox In5

Contact Info

Product

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Quasi-two-dimensional Fermi surfaces and the de Haas-van Alphen oscillation in both the normal and superconducting mixed states of CeCoIn₅

Neutron diffraction studies on heavy fermion superconducting and antiferromagnetic compounds CeRh_1–xCo_x In₅