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Cornell University
LASSP -  Laboratory of Atomic and Solid State Physics

Cornell Laboratory for Atomic and Solid State Physics

Kyle Shen and the “Infinite Layer”

Materials scientists at Cornell have taken another step closer to high-temperature superconductors.  Working with strontium-lanthanum cuprates, professor or physics Kyle Shen and collaborators created a superconductor at 100 Kelvin (-280 F, which is pretty warm for these researchers).  The work was published in the December 27 Physical Review Letters.

The group was observing the properties of strontium-lanthanum cuprates, nicknamed the “infinite layer” when doped with extra electrons.  When cooled the electrons undergo a phase transition and become superconducting, which means electrons can flow freely through them without resistance.

Scientists have previously studied strontium-lanthanum cuprates that are hole-doped – meaning electrons are removed from the material.  It was assumed that the materials should respond in the same way to hole doping and electron doping.  Shen’s results now show this needs to be studied further.

To read the paper in Physical Review Letters, click here.

To read more about Shen’s work in the Cornell Chronicle, click here.