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Intel & Georgia Tech Advance Spintronics

6/3/2014 08:35 PM EDT
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krisi
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Re: still electrons
krisi   6/6/2014 7:48:30 PM
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Hi @betash...you need to give Colin some credit...he is a journalist, damn good if you ask me, writes very interesting pieces about technology...it takes PhD in solid-state physics to start understanding these complex effects and even if you have it like me the full understanding is tough unless you work in this field...Kris

krisi
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Re: not only Intel
krisi   6/6/2014 7:36:39 PM
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thank you @Betash...would you be interested in presenting this topic at emerging technologies conference in Vancouver in 2015? program at www.cmosetr.com, let me know, kris.iniewski@gmail.com

Betash
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Re: not only Intel
Betash   6/6/2014 2:33:48 PM
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"How are interconnects modeled in this extended Spin-SPICE software?" 

The underlying physics and engineering framework for spin interconnects and spin circuits can be found at:

  All Spin Logic – Modeling Multi-magnet Networks Interacting via Spin currents  (To appear 2014)

(Handbook of Spintronics, Springer). This is a book chapter documenting all the details.

      http://arxiv.org/ftp/arxiv/papers/1304/1304.0742.pdf

Betash
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Re: still electrons
Betash   6/6/2014 2:18:40 PM
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  Your point is valid. Electrons will always play a role. If for nothing else, they have to be used to provide energy to the computing system no matter what the information token is. 

Unfortunately, this article has not articulated the point clearly essentially becuase this is a derivative work based on the articles below. 

For example, here is an abstract from Nature Nanotechnology 5, 266 - 270 (2010) :

The possible use of spin rather than charge as a state variable in devices for processing and storing information has been widely discussed1, 2, because it could allow low-power operation and might also have applications in quantum computing. However, spin-based experiments and proposals for logic applications typically use spin only as an internal variable, the terminal quantities for each individual logic gate still being charge-based3, 4, 5, 6, 7, 8. This requires repeated spin-to-charge conversion, using extra hardware that offsets any possible advantage. Here we propose a spintronic device that uses spin at every stage of its operation. Input and output information are represented by the magnetization of nanomagnets that communicate through spin-coherent channels. Based on simulations with an experimentally benchmarked model, we argue that the device is both feasible and shows the five essential characteristics9, 10 for logic applications: concatenability, nonlinearity, feedback elimination, gain and a complete set of Boolean operations.

 

For further information, see below:

1.       Proposal for an all spin logic device with built-in memory. (Nature Nanotech, 2010)

http://www.nature.com/nnano/journal/v5/n4/abs/nnano.2010.31.html

 

2.       Switching Energy-Delay of all spin logic devices (Applied Physics Letters, 2011)

http://scitation.aip.org/content/aip/journal/apl/98/12/10.1063/1.3567772

               

3.       All Spin Logic Device with Inbuilt Nonreciprocity (IEEE Transaction on Nanotechnology, Invited paper, 2011)

http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6028133

 

4.       All Spin Logic Devices  (United States Patent, Priority date: 2011, Filed 2012, Issued 2013)

US8698517 B2

http://www.google.com/patents/US8558571

 

5.       All Spin Logic – Modeling Multi-magnet Networks Interacting via Spin currents  (To appear 2014)

(Handbook of Spintronics, Springer). This is a detailed book chapter documenting all the details.

      http://arxiv.org/ftp/arxiv/papers/1304/1304.0742.pdf

krisi
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Re: not only Intel
krisi   6/6/2014 1:41:18 PM
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How are interconnects modeled in this extended Spin-SPICE software?

deepanjan1981
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Re: not only Intel
deepanjan1981   6/5/2014 2:25:37 PM
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The world's first Simulation Program with Integrated Circuit Emphasis (SPICE) platform for modeling these spintronics devices and interconnects was recently invented by Georgia Tech in collaboration with Intel.

 

All this beautiful modeling was started from coupled simulation of spin transport (NEGF) and LLG equation which was developed at Purdue and INTEL merely copied it. 

krisi
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Re: still electrons
krisi   6/4/2014 6:58:24 AM
yes and no...the information processing is done in spin domain...not electron charge...but I guess you have to move from one spin element to another to propagate signal across so likely interconnect involves electron charge, otherwise I am having hard time imaging the interconnect scheme

resistion
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still electrons
resistion   6/4/2014 1:59:31 AM
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Scattering at wire surfaces and grain boundaries also must be considered, since they become dominant at nanoscale dimensions.

It looks like the same limitations for conventional electronics carry over to spintronics.

krisi
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not only Intel
krisi   6/3/2014 10:58:27 PM
Spintronics is a very vibrant research field and Intel is not the only company looking at it...we have an entire session on spintronics at emerging technologies conference in Grenoble in July (www.cmosetr.com)...if we can make spintronics work that would lead to amazing revolution in computation and electronics! Kris

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