Pressure Tuning of the Interplay of Magnetism and Superconductivity in CeCu2Si2

E. Lengyel; M. Nicklas; H. S. Jeevan; C. Geibel; F. Steglich

doi:10.1103/PhysRevLett.107.057001

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Pressure Tuning of the Interplay of Magnetism and Superconductivity in CeCu2Si2

E. Lengyel, M. Nicklas, H. S. Jeevan, C. Geibel, F. Steglich

DOI 10.1103/PhysRevLett.107.057001 · Physical Review Letters

T1

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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.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
CeCu2Si2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.46	Pressure unresolved	onset
CeCu2Si2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.46	Pressure unresolved	onset
CeCu2Si2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.6	0.06 GPa	unknown