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Gegenwart, P.; Langhammer, Christoph; Geibel, C.; Helfrich, R.; Lang, Michael; Sparn, G.; Steglich, F.; Horn, Roger G.; Donnevert, L.; Link, A.; Aßmus, W.

doi:10.1103/physrevlett.81.1501

Cited by 161 publications

(141 citation statements)

References 24 publications

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“…At ambient pressure in contrast, critical magnetic fluctuations are believed to mediate the superconductivity. The magnetically ordered state, which in pure CeCu 2 Si 2 competes with the superconducting state is thought to disappear at a magnetic quantum critical point at a small positive pressure P c of approximately 0.1GPa [6]. This quantum critical point is masked by the superconducting state in pure samples, but can be directly observed by substituting Ge for Si which leads to a suppression of superconductivity [4,7].…”

Section: Introductionmentioning

confidence: 99%

Anisotropy, disorder, and superconductivity in CeCu₂Si₂under high pressure

Holmes

Jaccard

Jeevan

et al. 2005

J. Phys.: Condens. Matter

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Abstract. Resistivity measurements were carried out up to 8 GPa on single crystal and polycrystalline samples of CeCu 2 Si 2 from differing sources in the homogeneity range. The anisotropic response to current direction and small uniaxial stresses was explored, taking advantage of the quasi-hydrostatic environment of the Bridgman anvil cell. It was found that both the superconducting transition temperature T c and the normal state properties are very sensitive to uniaxial stress, which leads to a shift of the valence instability pressure P v and a small but significant change in T c for different orientations with respect to the tetragonal c-axis. Coexistence of superconductivity and residual resistivity close to the Ioffe-Regel limit around 5GPa provides a compelling argument for the existence of a valence-fluctuation mediated pairing interaction at high pressure in CeCu 2 Si 2 .

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Section: Introductionmentioning

confidence: 99%

Anisotropy, disorder, and superconductivity in CeCu₂Si₂under high pressure

Holmes

Jaccard

Jeevan

et al. 2005

J. Phys.: Condens. Matter

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“…As will be discussed in more detail below, zero resistivity is observed in the vicinity of the diamagnetic transition but at a slightly higher temperature (for x=0.5, T ρ=0 =1K). In contrast to CeIrIn 5 CeRhIn 5 . 20 In addition to the bulk phase transition observed in heat capacity data, a transition to zero resistance also persists over a wide range of doping.T ρ=0 is relatively independent of doping so that T c approaches T ρ=0 in the vicinity of x=0.5, resulting in a value of T c that is more than double that of stoichiometric CeIrIn 5 .…”

mentioning

confidence: 99%

Coexistence of magnetism and superconductivity inCeRh1−xIrxIn
Pagliuso
¹
,
Petrović
²
,
Movshovich
³

et al. 2001
Phys. Rev. B
177
5
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We report a thermodynamic and transport study of the phase diagram of CeRh 1-x Ir x In 5 . Superconductivity is observed over a broad range of doping, 0.3 < x < 1, including a substantial range of concentration (0.3 < x <0.6) over which it coexists with magnetic order (which is observed for 0 < x < 0.6). The anomalous transition to zero resistance that is observed in CeIrIn 5 is robust against Rh substitution. In fact, the observed bulk T c in CeRh 0.5 Ir 0.5 In 5 is more than double that of CeIrIn 5 , whereas the zeroresistance transition temperature is relatively unchanged for 0.5 < x < 1. PACS number(s) 74.70.Tx, 71.27.+a, 75.40.Cx Submitted to PRL

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“…Here we report new P -T phase diagrams for CeRhIn 5 and CeIn 3 obtained through 115 In-T 1 measurements and present a possible explanation for the different P dependence of the SC phase in the two compounds.…”

mentioning

confidence: 99%

“…The superconductivity in these compounds, however, occurs only in extreme conditions where the pressure exceeds ∼ 2 GPa and temperature (T ) is cooled down below ∼ 1 K. Indeed the experiments were restricted mainly to transport measurements. The discovery of P -induced HF superconductors in Ce-based HF-AF compounds has stimulated further experimental works under P [4,5,6,7]. In order to gain profound insight into a relationship between magnetism and superconductivity in HF systems, systematic NMR/NQR experiments under P are important, since they can probe the evolution of the magnetic properties toward the onset of SC phase.…”

mentioning

confidence: 99%

Pressure-temperature phase diagram of antiferromagnetism and superconductivity inCeRhIn5andCeIn3

et al. 2001

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We report the novel pressure(P ) -temperature(T ) phase diagram of antiferromagnetism and superconductivity in CeRhIn5 and CeIn3 revealed by the 115 In nuclear-spin-lattice-relaxation (T1) measurement. In the itinerant magnet CeRhIn5, we found that the Néel temperature TN is reduced at P ≥ 1.23 GPa with an emergent pseudogap behavior. In CeIn3, the localized magnetic character is robust against the application of pressure up to P ∼ 1.9 GPa, beyond which the system evolves into an itinerant regime in which the resistive superconducting phase emerges. We discuss the relationship between the phase diagram and the magnetic fluctuations.PACS numbers: PACS: 74.25. Ha, 74.62.Fj, 74.70.Tx, 75.30.Kz, 76.60.Gv It has been reported that a superconducting (SC) order in cerium (Ce)-based heavy-fermion (HF) compounds takes place nearby the border at which an antiferromagnetic (AF) order is suppressed by applying pressure (P ) to the HF-AF compounds CeCu 2 Ge 2 ,[1] CePd 2 Si 2 [2] and CeIn 3 [3]. The superconductivity in these compounds, however, occurs only in extreme conditions where the pressure exceeds ∼ 2 GPa and temperature (T ) is cooled down below ∼ 1 K. Indeed the experiments were restricted mainly to transport measurements. The discovery of P -induced HF superconductors in Ce-based HF-AF compounds has stimulated further experimental works under P [4,5,6,7]. In order to gain profound insight into a relationship between magnetism and superconductivity in HF systems, systematic NMR/NQR experiments under P are important, since they can probe the evolution of the magnetic properties toward the onset of SC phase.Recently, Hegger et al. found that a new HF material CeRhIn 5 consisting of alternating layers of CeIn 3 and RhIn 2 reveals an AF-to-SC transition at a relatively lower critical pressure P c = 1.63 GPa than in all previous examples [1,2,3]. The SC transition temperature T c = 2.2 K is the highest one to date among P -induced superconductors [4]. This finding has opened a way to investigate the P -induced evolution of both magnetic and SC properties over a wide P range. In the previous paper [7], the 115 In NQR study of CeRhIn 5 has clarified the P -induced anomalous magnetism and unconventional superconductivity. In the AF region, the Néel temperature T N exhibits a moderate variation, while the internal field H int at 115 In(1) site in the CeIn 3 plane due to the magnetic ordering is linearly reduced in P = 0 -1.23 GPa, extrapolated to zero at P * = 1.6 ± 0.1 GPa. This P * is comparable to P c = 1.63 GPa at which the SC signature appears [4], which was indicative of a second-order like AF-to-SC transition rather than the first-order one suggested previously [4]. At P = 2.1 GPa, it was found that the nuclear spin-lattice relaxation rate 1/T 1 reveals a T 3 dependence below the SC transition temperature T c , which shows the existence of line-nodes in the gap function [7]. It is, however, not yet clear how the electronic states change with P when the AF phase evolves into the SC phase.On the other hand, CeIn 3 c...

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Breakup of Heavy Fermions on the Brink of “PhaseA” inCeCu2Si2

Cited by 161 publications

References 24 publications

Anisotropy, disorder, and superconductivity in CeCu₂Si₂under high pressure

Anisotropy, disorder, and superconductivity in CeCu₂Si₂under high pressure

Coexistence of magnetism and superconductivity inCeRh1−xIrxIn
Pagliuso
¹
,
Petrović
²
,
Movshovich
³

et al. 2001
Phys. Rev. B
177
5
129
0
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Pressure-temperature phase diagram of antiferromagnetism and superconductivity inCeRhIn5andCeIn3

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Breakup of Heavy Fermions on the Brink of “PhaseA” inCeCu2Si2

Cited by 161 publications

References 24 publications

Anisotropy, disorder, and superconductivity in CeCu2Si2under high pressure

Anisotropy, disorder, and superconductivity in CeCu2Si2under high pressure

Coexistence of magnetism and superconductivity inCeRh1−xIrxInPagliuso1, Petrović2, Movshovich3 et al. 2001Phys. Rev. B17751290View full textAdd to dashboardCite

Pressure-temperature phase diagram of antiferromagnetism and superconductivity inCeRhIn5andCeIn3

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Anisotropy, disorder, and superconductivity in CeCu₂Si₂under high pressure

Anisotropy, disorder, and superconductivity in CeCu₂Si₂under high pressure

Coexistence of magnetism and superconductivity inCeRh1−xIrxIn
Pagliuso
¹
,
Petrović
²
,
Movshovich
³

et al. 2001
Phys. Rev. B
177
5
129
0
View full text Add to dashboard Cite