1. Superfluid Helium-4 Transition on
Multi-walled Carbon Nanotubes
Presenter: Vito Iaia
Principal Investigator: Dr. Gary Williams
Mentor: Emin Menachekanian
Department: Physics and Astronomy
4/23/15
2. What is Superfluid Helium-4 ?
Quantum fluid (below Tλ = 2.17 K)
No viscosity
No entropy
Macroscopic Bose-Coherence
Adsorbes on top of substrates
Transition temperature changes
with thinner films
Helium film
adsorbed on surface
2
8. Conclusions
New setup produces same response as old setup
More uniform vibration across the setup
Potential for less energy load on mixing chamber
8
11. Thanks!
Thanks to Dr. Gary Williams
Graduate mentor: Emin Menachekanian
Williams lab: Bob Chen, Andrew Li, Sergey Sushchikh
UC LEADS
Questions?
11
Editor's Notes
Measure C3 (Thickness and temperature wave)
Sweep through frequencies and measure resonant response /approx C3
Similar to water waves
Phase transition physics
1D film
Quantum phase transitions