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Electrons always find a way

How electrons are transported from a superconductor throughout a quantum dot into a metal with standard conductivity this matter have confirmed for the first time the scientists from the Swiss Nanoscience Institute and the Department of Physics at the University of Basel. In the nineties this transport procedure throughout a quantum dot had previously been calculated theoretically but in proving the theory with dimensions scientists at the University of Basel have succeeded. In the scientific magazine Physical Review Letters they report on their findings.

In technical applications of new materials and electronic components transport properties such as electrical conductivity play an important role. Absolutely new phenomena occur, for an example: when you join a superconductor & nanometer-sized structure then it is known as quantum dots in an element. To study electron transport between the two components, researchers at the University of Basel working under Professor Christian Schonenberger have constructed a quantum dot between a superconductor and a metal with normal conductivity.

It should in fact be not possible to transfer electrons from the superconductor throughout a quantum dot at little energies.

First of all, electrons never occur on an entity base in a superconductor but somewhat at all times in two’s or in so-called Cooper pairs which can simply be divided by comparatively huge amount of force.

2nd word, the quantum dot is so little that only 1 atom is elated at a time due to the revolting energy between electrons. In the past, scientists have frequently experiential that a present nevertheless runs between the superconductor and the metal in other words, electron transfer does take place during the quantum particle.

First proof of the transfer mechanism throughout a quantum dot On the basis of quantum mechanics theories were improved in the nineties which identity that the transfer of Cooper pairs throughout a quantum particle is completely possible under sure situation. The precondition is that the second electron follows the first so rapidly, namely within the time nearly fixed by Heisenberg’s uncertainty principle.

Now the scientists at the University of Basel have been capable to correctly determine this phenomenon. In their experiment the scientists create the correct same separate resonances that had been calculated theoretically. The team counting doctoral student Jorg Gramich and his manager Dr. Andreas Baumgartner was capable to supply proof that the procedure also works when energy emits into the surroundings or engrossed from it.

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