Q-tensor model of twist-bend and splay nematic phases
40 mins 22 secs,
587.39 MB,
MPEG-4 Video
640x360,
29.97 fps,
44100 Hz,
1.94 Mbits/sec
Share this media item:
Embed this media item:
Embed this media item:
About this item
Description: |
Copic, M
Tuesday 14th May 2019 - 16:00 to 16:40 |
---|
Created: | 2019-05-15 16:07 |
---|---|
Collection: | The mathematical design of new materials |
Publisher: | Isaac Newton Institute |
Copyright: | Copic, M |
Language: | eng (English) |
Distribution: | World (downloadable) |
Explicit content: | No |
Aspect Ratio: | 16:9 |
Screencast: | No |
Bumper: | UCS Default |
Trailer: | UCS Default |
Abstract: | The twist-bend nematic phase is characterized by a conically twisting director and by a dramatic softening of the bend elastic constant. The instability towards bend can theoretically also induce a splay -bend phase with a bend-splay modulation along the director. Recently we found another modulated nematic phase where the splay elastic constant tends to zero, resulting in a splay modulation perpendicular to the director. These phases can be modeled by a single Q-tensor free energy with a term that breaks the degeneracy between the splay and bend elastic constant and with a flexoelectric coupling of the divergence of the Q-tensor with polarization.
Martin Čopič and Alenka Mertelj - Insitute J. Stephan, Ljubljana, Slovenia |
---|
Available Formats
Format | Quality | Bitrate | Size | |||
---|---|---|---|---|---|---|
MPEG-4 Video * | 640x360 | 1.94 Mbits/sec | 587.39 MB | View | Download | |
WebM | 640x360 | 456.71 kbits/sec | 135.09 MB | View | Download | |
iPod Video | 480x270 | 522.13 kbits/sec | 154.37 MB | View | Download | |
MP3 | 44100 Hz | 249.82 kbits/sec | 73.92 MB | Listen | Download | |
Auto | (Allows browser to choose a format it supports) |