Thermal Conductivity Evidence for a<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>d</mml:mi><mml:mrow><mml:msup><mml:mi>x</mml:mi><mml:mn>2</mml:mn></mml:msup><mml:mo>−</mml:mo><mml:msup><mml:mi>y</mml:mi><mml:mn>2</mml:mn></mml:msup></mml:mrow></mml:msub></mml:math>Pairing Symmetry in the Heavy-Fermion<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>CeIrIn</mml:mi><mml:mn>5</mml:mn></mml:msub></mml:math>Superconductor

Kasahara, Yuichi; Iwasawa, Tetsuo; Shimizu, Yusei; Shishido, Hiroaki; Shibauchi, T.; Vekhter, Ilya; Matsuda, Yuji

doi:10.1103/physrevlett.100.207003

Cited by 44 publications

(39 citation statements)

References 37 publications

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“…Nuclear quadrupole resonance (NQR) measurement of Cd doped CeIrIn5 suggests a valence instability contributes to the SC2 [10]. On the other hands, nuclear magnetic resonance (NMR) and transport measurements suggest CeIrIn5 is in the vicinity of AFM QCP [11][12][13][14][15]. In order to clarify the relationship between SC and magnetic instability in CeIrIn5, we measured the electrical resistivity of Cd doped CeIrIn5 under pressure.…”

Section: Introductionmentioning

confidence: 99%

Physical properties of Cd doped CeIrIn₅ under pressure

Tsunoda¹,

Hirose²,

Settai³

2017

Proc. 17th Int. Conf. On High Pressure in Semiconductor Physics &Amp; Workshop on High-Pressure Study on Superconducting

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We measured the electrical resistivity ρ of CeIr(In1-xCdx)5 under pressure for x = 0.05 and 0.10, which show the onset of superconductivity (SC) at Tsc onset ~ 0.9 K and antiferromagnetic transition at TN ~ 3.4 K. For x = 0.05, Tsc onset increases by applying pressure up to 2.8 GPa and zero resistivity is observed at Tsc ρ=0 above 2.4 GPa. For x = 0.10, the pressure dependence of TN shows peak at around 2 GPa and TN seems to be 0 K toward 3 GPa, where SC phase appears. The maximum value of Tsc ρ=0 is independent on amount of doped Cd, showing 1.35 K. We analyzed the temperature dependence of the electrical resistivity ρ for x = 0.05 and 0.10 under pressure using the following equation, ρ = ρ0 + AT n . This analysis revealed that ρ shows the sublinear temperature dependence (n < 1) in the wide temperature region above Tsc ρ=0 , and ρ0 decreases abruptly in the pressure region where Tsc ρ=0 indicates a maximum.

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Section: Introductionmentioning

confidence: 99%

Physical properties of Cd doped CeIrIn₅ under pressure

Tsunoda¹,

Hirose²,

Settai³

2017

Proc. 17th Int. Conf. On High Pressure in Semiconductor Physics &Amp; Workshop on High-Pressure Study on Superconducting

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“…The significant 0 =T of Ce 2 PdIn 8 in zero field is strong evidence for nodes in the superconducting gap [34]. Further angle-dependent experiments will be able to show whether this nodal superconductivity is also d-wave, as in CeCoIn 5 [5,6], CeRhIn 5 under pressure [35], and CeIrIn 5 [36].…”

mentioning

confidence: 97%

Field-Induced Quantum Critical Point and Nodal Superconductivity in the Heavy-Fermion SuperconductorCe2PdIn8

et al. 2011

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The in-plane resistivity and thermal conductivity of the heavy-fermion superconductor Ce 2 PdIn 8 single crystals were measured down to 50 mK. A field-induced quantum critical point, occurring at the upper critical field H c2 , is demonstrated from the ðTÞ $ T near H c2 and ðTÞ $ T 2 when further increasing the field. The large residual linear term 0 =T at zero field and the rapid increase of ðHÞ=T at low field give evidence for nodal superconductivity in Ce 2 PdIn 8 . The jump of ðHÞ=T near H c2 suggests a first-order-like phase transition at low temperature. These results mimic the features of the famous CeCoIn 5 superconductor, implying that Ce 2 PdIn 8 may be another interesting compound to investigate for the interplay between magnetism and superconductivity. The interplay between magnetism and superconductivity has been a central issue for heavy-fermion superconductors [1], high-T c cuprates [2], and iron pnictides [3]. Among them, one particularly interesting case is the heavy-fermion superconductor CeCoIn 5 , with T c ¼ 2:3 K at ambient pressure [4]. Its superconducting gap has d-wave symmetry [5,6]. While there is no static magnetism in CeCoIn 5 at zero field, a field-induced antiferromagnetic (AF) quantum critical point (QCP) has been clearly demonstrated by resistivity and specific heat measurements [7,8]. Initially, it was very puzzling why the AF QCP is located right at the upper critical field H c2 .Meanwhile, the observations of first-order phase transition at low temperature and H c2 and a second magnetization and specific heat anomaly well inside the superconducting state have been interpreted as the signature of a Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) superconducting state [5,[9][10][11][12]. The novel FFLO state with broken spatial symmetry was predicted in the 1960s [13,14], but it has never been experimentally verified before. The possible FFLO state at the low-temperaturehigh-field (LTHF) corner of the H À T phase diagram of CeCoIn 5 has stimulated extensive studies [15].More recently, NMR, neutron scattering, and muon spin rotation ( SR) experiments have provided clear evidence for a field-induced magnetism in this LTHF part of the phase diagram [16][17][18][19][20][21]. It was identified as a spin-density wave (SDW) order with an incommensurate modulation Q ¼ ð0:44; 0:44; 0:5Þ. Interestingly, this SDW order disappears in the normal state above H c2 , showing that magnetic order and superconductivity in CeCoIn 5 are directly coupled [16,17]. While this has nicely explained the field-induced AF QCP at H c2 [7,8], the physical origin of this LTHF superconducting Q phase is still under debate. For example, Yanase and Sigrist have suggested that the incommensurate SDW order is stabilized in the FFLO state by the appearance of the Andreev bound state localized around the zeros of the FFLO order parameter [22]. Aperis, Varelogiannis, and Littlewood have argued that the Q phase is a pattern of coexisting condensates: a d-wave singlet superconducting state, a staggered -triplet superconducting s...

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“…Subsequent superconducting penetration depth 89) as well as field-angle-dependent thermal conductivity 90) and specific heat measurements argue that the nodal topology is d-wave, specifically d x 2 Ày 2 .…”

Section: Ceirinmentioning

confidence: 99%

Progress in Heavy-Fermion Superconductivity: Ce115 and Related Materials

2012

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Ce115 and related Ce compounds are particularly suited to detailed studies of the interplay of antiferromagnetic order, unconventional superconductivity and quantum criticality due to their availability as high quality single crystals and their tunability by chemistry, pressure and magnetic field. Neutron-scattering, NMR and angle-resolved thermodynamic measurements have deepened the understanding of this interplay. Very low temperature experiments in pure and lightly doped CeCoIn 5 have elaborated the FFLO-like magnetic state near the field-induced quantum-critical point. New, related superconducting materials have broadened the phase space for discovering underlying principles of heavy-fermion superconductivity and its relationship to nearby states.

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Thermal Conductivity Evidence for adx2−y2Pairing Symmetry in the Heavy-FermionCeIrIn5Superconductor

Cited by 44 publications

References 37 publications

Physical properties of Cd doped CeIrIn₅ under pressure

Physical properties of Cd doped CeIrIn₅ under pressure

Field-Induced Quantum Critical Point and Nodal Superconductivity in the Heavy-Fermion SuperconductorCe2PdIn8

Progress in Heavy-Fermion Superconductivity: Ce115 and Related Materials

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Thermal Conductivity Evidence for adx2−y2Pairing Symmetry in the Heavy-FermionCeIrIn5Superconductor

Cited by 44 publications

References 37 publications

Physical properties of Cd doped CeIrIn5 under pressure

Physical properties of Cd doped CeIrIn5 under pressure

Field-Induced Quantum Critical Point and Nodal Superconductivity in the Heavy-Fermion SuperconductorCe2PdIn8

Progress in Heavy-Fermion Superconductivity: Ce115 and Related Materials

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Product

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Physical properties of Cd doped CeIrIn₅ under pressure

Physical properties of Cd doped CeIrIn₅ under pressure