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IMPORTANT NEWS FROM PHYSICSWEB
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A Casimir force for good in MEMS design Nov 2
Researchers in the US and Russia have demonstrated that the Casimir force between two conducting surfaces can be controlled by modifying the density of charge-carrying particles within the surfaces. The result could have positive implications for the design of novel microelectroechanical systems, or MEMS (Phys Rev Lett 97 170402).
Supersolid's existence remains in dispute Nov 2
The existence of a new state of matter called a "supersolid" has been called into question by the reports of two groups with apparently conflicting results. Physicists from Cornell University in NY, USA claim to have reproduced previous findings of a supersolid transition in helium below 250 mK (Phys. Rev. Lett. 97 165301). On the other hand, a group from Helsinki University of Technology in Finland has found no transition when helium is cooled down to 10 mK (Phys. Rev. Lett. 97 165302).
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