Quantum effects in the radial thermal expansion of bundles of single-walled carbon nanotubes doped with 4He

• The radial thermal expansion αr of bundles of single-walled carbon nanotubes saturated with 4He impurities to the molar concentration 9.4% has been investigated in the interval 2.5–9.5 K using the dilatometric method. In the interval 2.1–3.7 K αr is negative and is several times higher than the negative αr for pure nanotube bundles. This most likely points to 4He atom tunneling between different positions in the nanotube bundle system. The excess expansion was reduced with decreasing 4He concentration.

Ämnesord

NATURVETENSKAP  -- Fysik -- Den kondenserade materiens fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Condensed Matter Physics (hsv//eng)

Nyckelord

Single-walled carbon nanotubes

SWCNT

thermal expansion

radial thermal expansion

doping

helium

quantum effects

Condensed matter physics

Kondenserade materiens fysik

fysik

Physics

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)