1 / 2

T 1/2 , temperature where NCRI is reduced to 50%

Supersolid, a slippery new state of matter Moses H.W. Chan (Pennsylvania State Univ University Park ) DMR 0706339. The observation of superfluid-like or non classical rotational inertia (NCRI) behavior in solid 4 He have been replicated in five other laboratories. 1

ziazan
Download Presentation

T 1/2 , temperature where NCRI is reduced to 50%

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Supersolid, a slippery new state of matterMoses H.W. Chan (Pennsylvania State Univ University Park ) DMR 0706339 • The observation of superfluid-like or non classical rotational inertia (NCRI) behavior in solid 4He have been replicated in five other laboratories.1 • Evidence of pinning of quantum vortices by 3He impurities and/or dislocation were also found.2 • Measurements in solid with different 3He impurities show the onset of NCRI tracks the condensation of 3He atoms onto the dislocation lines,3 consistent with the finding from the University of Alberta of the stiffening of the solid at low temperature. • A specific heat peak correlated with the onset of NCRI was observed.4 • 1.Science 319, 1207( 2008), Perspective. • 2 Phys. Rev. B 77, 184513( 2008) • 3. Phys. Rev. Lett. 100, 065301(2008). • 4. Nature 449, 1025(2007) T1/2, temperature where NCRI is reduced to 50% of its low temperature value in samples of different 3He concentrations, (x3). These data points, obtained with different torsional oscillator cells, were found to follow a curve that describes the condensation of 3He atoms onto the dislocation lines. ( From reference 3.)

  2. Please insert an image or group of images here to illustrate your broader impacts activities. If you need more space, you may reduce the adjacent textbox. Please use lettering that is clearly visible (i.e. not too small). Please include a brief figure caption. Children at the Central Pennsylvania Festival of the Arts found out from Moses Chan, Josh West and Zhigang Cheng that low temperature physics is cool. Supersolid, a slippery new state of matter Moses H.W. Chan (Pennsylvania State Univ University Park) DMR 0706339 The discovery of NCRI has energized the field of quantum solids and spawned more than 180 papers and six dedicated workshops, including two this summer at Les Trellies ( France ) and at the International Center for Theoretical Physics at Trieste. E. Kim, co-discoverer of the phenomenon was awarded the Lee-Richardson-Osheroff Prize of 2008. The P.I. is the director of a NSF/RET site grant (DMR-0648837) giving the P.I. and his students ample opportunities to participate in outreach activities to the public. The P.I. is a member of a NAS Committee studying the effects of current shortage of liquid helium on US research activities.

More Related