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Sodium is the most abundant alkali-metal element and has one of the simplest electronic structures of any metal. At ambient conditions, sodium forms a body-centered-cubic lattice. However, during cooling, it undergoes a partial...
We report an extraordinary pressure dependence of the magnetic interactions in the metal-organic system [CuF2(H2O)(2)](2) pyrazine. At zero pressure, this material realizes a quasi-two-dimensional spin-1/2 squarelattice Heisenberg...
One early triumph of quantum physics is the explanation why some materials are metallic whereas others are insulating. While a treatment based on single electron states is correct for most materials this approach can fail spectacularly, ...
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