Pressure Tuning of the Interplay of Magnetism and Superconductivity in CeCu2Si2

Abstract

We carried out specific-heat and ac-susceptibility experiments under hydrostatic pressure to investigate the interplay of spin-density-wave antiferromagnetism (A) and superconductivity (S) in single-crystalline AS-type CeCu2Si2. We find evidence for a line of magnetic-field- and pressure-tuned quantum critical points in the normal state in the zero-temperature magnetic field-pressure plane. Our analysis suggests an extension of this line into the superconducting state and corroborates the close connection of the underlying mechanisms leading to the formation of the antiferromagnetic and the superconducting states in AS-type CeCu2Si2.

arXiv comment4 pages, 4 figures

References in corpus (6)

• Hidden Magnetism and Quantum Criticality in the Heavy Fermion Superconductor CeRhIn5
• Signatures of valence fluctuations in CeCu2Si2 under high pressure
• p-wave and d-wave superconductivity in quasi-two-dimensional metals
• Coexistence of antiferromagnetism and superconductivity in CeRhIn5 under high pressure and magnetic field
• Two Superconducting Phases in CeRh_1-xIr_xIn_5
• Pressure-induced change of the pairing symmetry in superconducting CeCu2Si2

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• Valence Fluctuation in CeMo2Si2C
• CeIrIn5: Superconductivity on a Magnetic Instability
• Interplay between unconventional superconductivity and heavy-fermion quantum criticality: CeCu${}_2$Si${}_2$ versus YbRh${}_2$Si${}_2$
• The Dominant Role of Critical Valence Fluctuations on High $T_{\mathrm{c}}$ Superconductivity in Heavy Fermions
• Pressure-tuned quantum criticality in the locally non-centrosymmetric superconductor CeRh${}_2$As${}_2$
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• High-energy magnetic excitations from heavy quasiparticles in CeCu${}_2$Si${}_2$
• Exposing the odd-parity superconductivity in CeRh${}_2$As${}_2$ with hydrostatic pressure
• High pressure investigation of superconducting signatures in CeCu${}_2$Si${}_2$ : ac- magnetic susceptibility and heat capacity, resistivity and thermopower
• CeCu${}_2$Si${}_2$ and YbRh${}_2$Si${}_2$: Strange Cases of Heavy-Fermion Superconductivity
• Gradual pressure-induced enhancement of magnon excitations in CeCoSi