Naked Science Forum
Non Life Sciences => Physics, Astronomy & Cosmology => Topic started by: ScientificSorcerer on 22/06/2017 17:31:15
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OK what I'm trying to say is rather simple.
Lets say you have water which is a polarized molecule, you place the water near a high voltage electric field to align all the water molecules along an axis then freeze the water and remove the high voltage field
will the ice retain the alignment that the electric field created?
(https://qph.ec.quoracdn.net/main-qimg-5cb404541a9492d1929fd033e66ec6e4)
see the picture on the right, will ice grown in an a high voltage electric field retain alignment after the electric field is removed?
I am trying to find a material (lattice) that can align free electron spin along an axis. so that all the free electron spins point in a certain direction.
I want a sea of electrons which have electron spin alignment.
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It is possible to set up a static electric field inside a material that persists after an external electric field is removed, but the mechanism is not exactly the same as what you propose. THey are called electrets, see here: https://en.wikipedia.org/wiki/Electret
Then your post gets a little confusing when talking about electron spin. A material that has a net electric dipole moment doesn't necessarily have a net magnetic moment, and vice versa. Materials with a permanent magnetic moment are magnets, and are usually not charged. Can you talk a little more about what you are trying to do?
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Ok the Idea is that you have a material which has a lot of free electrons moving around in its lattice.(https://www.thenakedscientists.com/forum/proxy.php?request=http%3A%2F%2Fstatic.filmannex.com%2Fusers%2Fgalleries%2F289675%2Fclip_image003_fa_rszd.jpg&hash=36674f4febc0fadcdd06df223b808b36)
the electrons are randomly moving around in the lattice unbound by any wells. the electron spins of these free electrons is random too... the Idea is to make the spin of the free electrons aligned as they move around in a material.
It deals with superconductors, I think if you can polarize the free electron spins you can get them to more easily pair up into cooper pairs. Its hard to explain but It I think hydrogen sulfide superconductors have spin polarization going on via a locally polarized lattice which facilitates superconductivity.
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My understanding is that the nature of lattice vibrations (phonons) is more important to the formation of Cooper pairs than an external electric field is. But my understanding of superconductivity is fairly limited.
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The relatively new field of spintronics aims to extend traditional semiconductors by using the spin of electrons to control their motion, and carry information.
See: https://en.wikipedia.org/wiki/Spintronics