DrDu's latest activity
-
DDrDu replied to the thread A Stability of persistent currents in superconductors regardless of temperature.I think that a wealth of this kind of experiments has been performed and published as the understanding of the breakdown of...
-
DDrDu replied to the thread A Stability of persistent currents in superconductors regardless of temperature.I had a look at your draft. In steady state, there will be an influx of Cooper pairs into the non-SC chamber and a reflux of electrons...
-
DDrDu replied to the thread A Stability of persistent currents in superconductors regardless of temperature.The pairs are in a condensate and the whole condensate has to be accelerated. The acceleration of the condensate is due to the electric...
-
DDrDu replied to the thread A Stability of persistent currents in superconductors regardless of temperature.This is a thermodynamical argument, not an argument about violation of conservation of momentum. So I think we can agree on that there...
-
DDrDu replied to the thread A Stability of persistent currents in superconductors regardless of temperature.This is a thermodynamical argument, not an argument about violation of conservation of momentum. So I think we can agree on that there...
-
DDrDu replied to the thread I Instantaneous dipole moment and orbitals.When talking about London forces, you always need at least two atoms. Their dipole dipole interaction involves the product of the dipole...
-
DDrDu replied to the thread A Stability of persistent currents in superconductors regardless of temperature.The collision of the normal conducting electrons with the lattice preserves (angular) momentum. It is first carried by the electrons...
-
DDrDu replied to the thread A Stability of persistent currents in superconductors regardless of temperature.Of course the normal conducting electrons will slow down due to collisions with the lattice atoms. Normal resistivity. Where is the...
-
DDrDu replied to the thread A Stability of persistent currents in superconductors regardless of temperature.I really think there is a very small transient decrease of supercurrent, if you suddenly decrease the superconducting density by...
-
DDrDu replied to the thread A Stability of persistent currents in superconductors regardless of temperature.Found this interesting article: https://arxiv.org/pdf/1609.08451
-
DDrDu replied to the thread A Stability of persistent currents in superconductors regardless of temperature.In principle, this is the Einstein - de Haas effect. The electronic sub-system condenses into a broken symmetry state with...
-
DDrDu replied to the thread A Stability of persistent currents in superconductors regardless of temperature.There is no momentum conservation for the electrons alone. Momentum can always be taken up from or given to the lattice.
-
DDrDu replied to the thread A Stability of persistent currents in superconductors regardless of temperature.Breaking a pair reduces the magnetic field which leads to an electric field which speeds up the other Cooper pairs which increase the...
-
DDrDu replied to the thread Why does having 8 valence electrons make an element inert?.For me it works fine. For legal reasons I find it problematic to upload papers I do not own.
-
DDrDu replied to the thread Why does having 8 valence electrons make an element inert?.I looked for bader's electron localisation function and NaCl and found the following paper which seems to support the classical picture...