Re: Epi snip sam said

From: tj Frazir (GravityPhysics_at_webtv.net)
Date: 02/12/05 

Date: Fri, 11 Feb 2005 21:10:01 -0500

 
WATCHING ATOMS MOVE
 
Group: sci.physics Date: Sat, Feb 12, 2005, 1:55am (EST+5) From:
swormley1@mchsi.com (Sam Wormley)
PHYSICAL REVIEW FOCUS   11 February 2005   http://focus.aps.org/
David Ehrenstein and Davide Castelvecchi, American Physical Society
Introductions to the Focus stories of the past week; visit
http://focus.aps.org for the complete stories.
WATCHING ATOMS MOVE
Researchers usually compare "before" and "after" pictures of typical
regions of a material to see how it changes during a phase transition.
But now a team has watched a specific set of atoms continuously during a
surface phase transition to see exactly how it occurs, and has made
atomic-scale movies. In the 4 February PRL they describe their
ultrastable scanning-tunneling microscope, or STM, that can remain fixed
on the same set of surface atoms, even as the temperature rises by 100
Kelvin--a huge warming that would cause other microscopes to "lose their
place." By studying one especially pristine region of the surface, the
researchers were able to learn how the transition occurs, atom-by-atom,
in a perfectly clean system.
(I. Brihuega et al., Phys. Rev. Lett. 94, 046101) Link to the paper:
http://link.aps.org/abstract/PRL/v94/e046101 COMPLETE Focus story and
PHASE TRANSITION VIDEOS at http://focus.aps.org/story/v15/st6
NEW FOCUS POSTER: Go to http://focus.aps.org/poster.html to download the
new poster. For free copies on glossy paper, follow the email ordering
instructions on the page.

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