Projects per year
Abstract
Low dimensional fermionic quantum systems are exceptionally interesting because they reveal distinctive physical phenomena, including among others, topologically protected excitations, edge states, frustration, and fractionalization. Our aim was to confine 3He on a suspended carbon nanotube to form 2-dimensional Fermi-system. Here we report our measurements of the mechanical resonance of the nanotube with adsorbed sub-monolayer down to 10 mK. At intermediate coverages we have observed the famous 1/3 commensurate solid. However, at larger monolayer densities we have observed a quantum phase transition from 1/3 solid to an unknown, soft, and mobile solid phase. We interpret this mobile solid phase as a bosonic commensurate crystal consisting of helium dimers with topologically-induced zero-point vacancies which are delocalized at low temperatures. We thus demonstrate that 3He on a nanotube merges both fermionic and bosonic phenomena, with a quantum phase transition between fermionic solid 1/3 phase and the observed bosonic dimer solid.
Original language | English |
---|---|
Article number | 5873 |
Pages (from-to) | 1-9 |
Number of pages | 9 |
Journal | Nature Communications |
Volume | 13 |
Issue number | 1 |
DOIs | |
Publication status | Published - 5 Oct 2022 |
MoE publication type | A1 Journal article-refereed |
Fingerprint
Dive into the research topics of 'Topologically-imposed vacancies and mobile solid 3He on carbon nanotube'. Together they form a unique fingerprint.-
-
CNTstress: Using Carbon Nanotube Materials to Improve the Stress Grading System of an Electrical Machine
Kauppinen, E., Ahmad, S., Zhang, Q., Tavakkoli, M. & Khan, M.
01/09/2018 → 31/08/2022
Project: Academy of Finland: Other research funding
-
Finnish Centre of Excellence in Quantum Technology
Hakonen, P., Laitinen, A., Elo, T., Kumar, M. & Suresh, K.
01/01/2018 → 31/12/2020
Project: Academy of Finland: Other research funding
Equipment
Press/Media
-
Topologically-imposed vacancies and mobile solid 3He on carbon nanotube
26/10/2022
1 item of Media coverage
Press/Media: Media appearance