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Valence Instability and Superconductivity in Heavy Fermion Systems
Alexander T. Holmes, Didier Jaccard, Kazumasa Miyake
Many cerium-based heavy fermion (HF) compounds have pressure-temperature phase diagrams in which a superconducting region extends far from a magnetic quantum critical point. In at…
Metallic State in Cubic FeGe beyond its Quantum Phase Transition
P. Pedrazzini, H. Wilhelm, D. Jaccard +8
We report on results of electrical resistivity and structural investigations on the cubic modification of FeGe under high pressure. The long-wavelength helical order ( K)…
Controlled Stark shifts in Er-doped crystalline and amorphous waveguides for quantum state storage
Sara R. Hastings-Simon, Matthias U. Staudt, Mikael Afzelius +4
We present measurements of the linear Stark effect on the I I transition in an Er-doped proton-exchanged LiNbO crystalline waveguide…
Investigations of Optical Coherence Properties in an Erbium-doped Silicate Fiber for Quantum State Storage
Matthias U. Staudt, Sara R. Hastings-Simon, Mikael Afzelius +3
We studied optical coherence properties of the 1.53 m telecommunication transition in an Er-doped silicate optical fiber through spectral holeburning and photon echoes. W…