Quantum spin dynamics

Research group

Research theme

Sub department

About

Efficient Dynamic Nuclear Polarization at High Magnetic Fields (vol 98, 220501, 2007)

PHYSICAL REVIEW LETTERS 103:19 (2009) ARTN 199902

Authors:

Gavin W Morley, Johan van Tol, Arzhang Ardavan, Kyriakos Porfyrakis, Jinying Zhang, G Andrew D Briggs
More details from the publisher

Inadequacies in the conventional treatment of the radiation field of moving sources

JOURNAL OF MATHEMATICAL PHYSICS 50:10 (2009) ARTN 103510

Authors:

Houshang Ardavan, Arzhang Ardavan, John Singleton, Joseph Fasel, Andrea Schmidt
More details from the publisher

Magnetic properties of ErSc2 N @ C80, Er2 ScN @ C80 and Er3 N @ C80 fullerenes

Chemical Physics Letters 466:4-6 (2008) 155-158

Authors:

A Tiwari, G Dantelle, K Porfyrakis, AAR Watt, A Ardavan, GAD Briggs

Abstract:

The magnetic properties of ErSc2 N @ C80, Er2 ScN @ C80 and Er3 N @ C80 metallofullerenes are characterized in the temperature range 2 to 300 K up to a magnetic field of 7 T. The magnetic susceptibility of these fullerenes follows the Curie-Weiss law. The fitting parameters to the Curie-Weiss law provide an effective magnetic moment μeff of Er3 + ion in each of the fullerenes. The magnetic moment decreases with the increase in number of Er3 + ions inside the cage. This is related to crystal-field effects, intramolecular interactions and the local quenching of the angular momentum of the ion within the fullerene cage. © 2008 Elsevier B.V. All rights reserved.
More details from the publisher

Magnetic field sensing beyond the standard quantum limit using 10-spin NOON states

(2008)

Authors:

Jonathan A Jones, Steven D Karlen, Joe Fitzsimons, Arzhang Ardavan, Simon C Benjamin, GAD Briggs, John JL Morton
More details from the publisher

Electronic transport characterization of Sc@ C82 single-wall carbon nanotube peapods

Journal of Applied Physics 104:8 (2008)

Authors:

AL Cantone, MR Buitelaar, CG Smith, D Anderson, GAC Jones, SJ Chorley, C Casiraghi, A Lombardo, AC Ferrari, H Shinohara, A Ardavan, J Warner, AAR Watt, K Porfyrakis, GAD Briggs

Abstract:

We present electrical transport and Raman measurements on individual single-wall carbon nanotubes filled with the paramagnetic metallofullerene Sc@ C82. We find nearly all devices to be metallic p -type conductors, which we tentatively attribute to bandstructure modification of the nanotubes by the encapsulated Sc@ C82 molecules. At low temperatures the peapod devices behave as quantum dots and transport is shown to be quantum coherent over distances of at least ∼100 nm. Kondo features are observed at the lowest measurement temperatures of 50 mK. Our results are of fundamental interest because of the long spin coherence times of the unpaired electrons on the Sc@ C82 molecules and the possibility this offers for studying one-dimensional spin chains in carbon nanotubes. © 2008 American Institute of Physics.
More details from the publisher
More details