Pressure Tuning of the Interplay of Magnetism and Superconductivity in CeCu2Si2

Physics – Condensed Matter – Strongly Correlated Electrons

Scientific paper

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4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.107.057001

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.

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