Talk:Spintronics

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"Less radical spintronic devices would allow one to put a pair of signals through a single wire, by using spin polarised electrons and producing a different signal on spin up electrons to the spin down. This has the effect of doubling the bandwidth of the cable."

Really? Signals aren't sent on individual electrons; they are sent on the electric waves of the electrons repelling each other. The actual speed of electron travel through a wire is very slow. Do spin up and spin down electrons repel only themselves? Or a different amount? - Omegatron 02:34, Jun 25, 2005 (UTC)
I agree. There have been some experiments on 'spin transport'. This abstract suggests that the transport of spin (or 'spin current') over a distance of 100 micrometres is a big deal (or was in 1999). I think this is done by creating ballistic electrons inside semiconductors. This is obviously a far cry from creating macroscopic spin wires. I'll put a 'hypothetical' note in the article. --Heron 11:12, 17 July 2005 (UTC)
So this is probably just the result of journalists trying to write about science again? And everyone accepting it as fact.
Seems like it would be a lot less work to just string up two wires.  :-) - Omegatron 15:42, July 17, 2005 (UTC)

Contents

[edit] Question on disambiguation

In the upper-right "Unsolved problems" box, I had changed the link to charge to link to electric charge in order to disambiguate. May I get some opinions on whether or not that was correct? A user changed it back, but did not explain why. Aguerriero (talk) 22:53, 13 June 2006 (UTC)

Okay, well I'm going to change it to charge (physics), lacking any comment. Aguerriero (talk) 23:46, 15 June 2006 (UTC)

[edit] Brief Question

In the first paragaph it is stated that a normal pair of electrons can have four combinations (00, 01, 10, 11) It is then stated that a pair of qubits can have eight combinations. I'm not certain but should this not be 9? (00, 0u, 0d, uu, ud, u0, du, dd, d0) Sorry if I'm incorrect, I was just looking at it logically...

[edit] GMR ratio

I came up with this TeX for the GMR ratio:

\frac{\left (Antiparallel~Resistance - Parallel~Resistance\right )}{Parallel~Resistance} \times 100\%

But I'm not sure whether it can fit inside the article. It is probably better than the present representation, the plain text "(Antiparallel Resistance - Parallel Resistance) / Parallel Resistance x 100%", but it doesn't fit in line. — Itai (talk) 17:08, 8 August 2006 (UTC)

[edit] the other Spintronics

List of NAS manufacturers mentions "Spintronics" and links here. Is there really a "Spintronics" company that sells NAS systems? My Google search is finds only references to the physics concept, not any company. --76.209.28.72 09:06, 3 July 2007 (UTC)

[edit] Re-write needed?

The first paragraph of the main article seems very badly worded to me. Why is there a segue into talking about unrelated properties of electrons? And isn't spin a general property of fermions, not just electrons? Wouldn't the concept of 'spintronics' also incorporate this? 314159 00:03, 20 July 2007 (UTC)

[edit] Spin Coulomb Drag

I suggest that the effects of spin Coulomb drag (or spin drag, for short) as predicted in 2000 by Giovanni Vignale and Irene D'Amico of the University of Missouri - Columbia, and confirmed in 2005 by Joseph Orenstein et alia of the Lawrence Berkeley National Laboratory, be discussed in this article.--Corkgkagj 22:43, 2 December 2007 (UTC)

[edit] Removed the unresolved problem

Unsolved problems in physics: Is it possible to construct a practical electronic device that operates on the spin of the electron, rather than its charge?

This does not belong here. Unresolved problems are reserved for fundamental problems, not about problems about how to develop something to the practical state. Likewise a space elevator isn`t a fundamental physical problem either. It might fit in a e.g. "hot topic" template.Slicky (talk) 08:39, 1 February 2008 (UTC)