Quantum spin dynamics

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Magnetic properties of ErSc2N@C80, Er2ScN@C80 and Er3N@C80 fullerenes

CHEMICAL PHYSICS LETTERS 466:4-6 (2008) 155-158

Authors:

Archana Tiwari, Geraldine Dantelle, Kyriakos Porfyrakis, Andrew AR Watt, Arzhang Ardavan, G Andrew D Briggs
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Mechanism of generation of the emission bands in the dynamic spectrum of the Crab pulsar

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 388:2 (2008) 873-883

Authors:

Houshang Ardavan, Arzhang Ardavan, John Singleton, Mario R Perez
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Photoisomerization of a fullerene dimer

JOURNAL OF PHYSICAL CHEMISTRY C 112:8 (2008) 2802-2804

Authors:

Jinying Zhang, Kyriakos Porfyrakis, John JL Morton, Mark R Sambrook, Jeffrey Harmer, Li Xiao, Arzhang Ardavan, G Andrew D Briggs
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Temperature-dependent photoluminescence study of ErSC2N@C80 and Er2ScN@C80 fullerenes

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS 245:10 (2008) 1998-2001

Authors:

Archana Tiwari, Geraldine Dantelle, Kyriakos Porfyrakis, Arzhang Ardavan, G Andrew D Briggs
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Configuration-selective spectroscopic studies of Er3+ centers in ErSc2N@C80 and Er2ScN@C80 fullerenes.

J Chem Phys 127:19 (2007) 194504

Authors:

Archana Tiwari, Geraldine Dantelle, Kyriakos Porfyrakis, Robert A Taylor, Andrew AR Watt, Arzhang Ardavan, G Andrew D Briggs

Abstract:

Low temperature photoluminescence (PL) and photoluminescence excitation (PLE) spectroscopy of high purity ErSc(2)N@C(80) and Er(2)ScN@C(80) fullerenes reveal at least two metastable configurations of the Er(3+) ion within the cage, consistent with previous observations from x-ray diffraction. Using PLE measurements at a number of different emission wavelengths we have characterized the ground state, (4)I(152), and the first excited state, (4)I(132), of the various Er(3+) configurations and their crystal-field splitting. We present detailed energy level diagrams for the ground and excited states of the two dominant configurations of ErSc(2)N@C(80) and Er(2)ScN@C(80).
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