High temperature superconductivity (Tc onset at 34K) in the high pressure orthorhombic phase of FeSe

Details High temperature superconductivity (Tc onset at 34K) in the high pressure orthorhombic phase of FeSe High temperature superconductivity (Tc onset at 34K) in the high pressure orthorhombic phase of FeSe

2009-03-23

arxiv.org/abs/0903.3888v2

EPL, 86 (2009) 27001

Physics

Condensed Matter

Superconductivity

15 pages, 4 figures

Scientific paper

10.1209/0295-5075/86/27001

We have studied the structural and superconducting properties of tetragonal FeSe under pressures up to 26GPa using synchrotron radiation and diamond anvil cells. The bulk modulus of the tetragonal phase is 28.5(3)GPa, much smaller than the rest of Fe based superconductors. At 12GPa we observe a phase transition from the tetragonal to an orthorhombic symmetry. The high pressure orthorhombic phase has a higher Tc reaching 34K at 22GPa.

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