Quantum interference of tunnel trajectories between states of different spin length in a dimeric molecular nanomagnet

Nature Physics

Volumn 4, Issue 4, 2008, Pages 277-281

  Ramsey, Christopher M ^a   Del Barco, Enrique ^a   Hill, Stephen ^b   Shah, Sonali J ^c   Beedle, Christopher C ^c   Hendrickson, David N ^c  

^a UNIVERSITY OF CENTRAL FLORIDA   (United States)

^b University of Florida   (United States)

^c UNIVERSITY OF CALIFORNIA   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

COMPUTATION THEORY; DEGREES OF FREEDOM (MECHANICS); DIMERS; ELECTROSPINNING; LOGIC SYNTHESIS; MOLECULES; NANOMAGNETICS; QUANTUM COMPUTERS; QUANTUM INTERFERENCE DEVICES; SPIN DYNAMICS; WHEELS;

ENTANGLED STATE; FERROMAGNETIC EXCHANGE COUPLINGS; MOLECULAR DIMERS; MOLECULAR NANOMAGNETS; QUANTUM INTERFERENCE; QUANTUM LOGIC GATE; QUANTUM-MECHANICAL SUPERPOSITION; SINGLE-MOLECULE MAGNET;

QUANTUM ENTANGLEMENT;

EID: 41549131248     PISSN: 17452473     EISSN: 17452481     Source Type: Journal    
DOI: 10.1038/nphys886     Document Type: Article

References (31)

1. Loss, D. & DiVincenzo, D. P. Quantum computation with quantum dots. Phys. Rev. A 57, 120-126 (1998).
2. Leuenberger,M. & Loss, D. Quantum computing in molecular magnets. Nature 410, 789-793 (2001).
3. Wernsdorfer, W., Aliaga-Alcade, N., Hendrickson, D. N. & Christou, G. Exchange-biased quantum tunneling in a supram olecular dimer of single-molecule magnets. Nature 416, 406-409 (2002).
4. Hill, S., Edwards, R. S., Aliaga-Alcade, N. & Christou, G. Quantum coherence in an exchange-coupled dimer of single-molecule magnets. Science 302, 1015-1018 (2003).
5. Prokof 'ev, N. V. & Stamp, P. C. E. Theory of the spin bath. Rep. Prog. Phys. 63, 669-726 (2000).
6. Chudnovsky, E. M. Universal decoherence in solids. Phys. Rev. Lett. 92, 120405 (2004).
7. 4 . Phys. Rev. Lett. 93, 157202 (2004).
8. 7 Ni antiferromagnetic rings. Phys. Rev. B 72, 060409 (2005).
9. Waldmann, O., Dobe, C., Mutka, H., Furrer, A. & Güdel, H. U. Neel-vectar tunneling in antiferromagnetic molecular dusters. Phys. Rev. Lett. 95, 057202 (2005).
10. 8 single-molecule magnet induced by high-in tensity microwave radiation. Europhys. Lett. 71, 110-116 (2005).
11. Ardavan, A. et al. Will spin-relaxation times in molecular magnets permit quantum information processing? Phys. Rev. Lett. 98, 057201 (2007).
12. Friedman, J. R., Sarachik, M. P., Tejada, J. & Ziolo, R. Macroscopic measurements of resonant magnetization tunneling in high-spin molecules. Phys. Rev. Lett. 76, 3830-3833 (1996).
13. Thomas, L. et al. Macroscopic quantum tunnelling of magnetization in a single crystal of nanomagnets. Nature 383, 145-147 (1996).
14. 12 -acetate. Phys. Rev. Lett. 85, 4803-4806 (2000).
15. Wernsdorfer, W. & Sessoli, R. Quantum phase interference and parity effects in magnetic molecular clusters. Science 284, 133-135 (1999).
16. 12 -acetate. Phys. Rev. Lett. 91, 047203 (2003).
17. 12 -acetate. J. Low. Temp. Phys. 140, 119-174 (2005).
18. Chudnovsky, E. M. & Tejada, J. Quantum Tunneling of the Magnetization (Oxford Univ. Press, New York, 1983).
19. Carretta, S. et al. Quantum oscillations of the total spin in a heterometallic antiferromagnetic ring: Evidence from neutron spectroscopy. Phys. Rev. Lett. 98, 167401 (2007).
20. Chiolero, A. & Loss, D. Macroscopic quantum coherence in ferrimagnets. Phys. Rev. B 56, 738-746 (1997).
21. Mder, F. & Loss, D. Electron and nuclear spin dynamics in antiferromagnetic molecular rings. Phys. Rev. Lett. 86, 5373-5376 (2001).
22. Loss, D., DiVincenzo, D. P. & Grinstein, G. Suppression of tunneling by interference in half-integer-spin particles. Phys. Rev. Lett. 69, 3232-3235 (1992).
23. von Delft, J. & Henley, C. L. Destructive quantum interference in spin tunneling problems. Phys. Rev. Lett. 69, 3236-3239 (1992).
24. Garg, A. Topologically quenched tunnel splitting in spin systems without Kramers' degeneracy. Europhys. Lett. 22, 205-210 (1993).
25. Leuenberger, M. N. & Loss, D. Spin tunneling and topological selection rules for integer spins. Phys. Rev. B 63, 054414 (2001).
26. Sjöqvist, E. Geometric phase for entangled spin paris. Phys. Rev. A 62, 022109 (2000).
27. 6 ] complexes. Inorg. Chem. 43, 6531-6533 (2004).
28. 12 ] single molecule magnets. Inorg. Chem. 44, 2742-2752 (2005).
29. Foguet-Albiol, D. et al. DFT computational rationalization of an unusual spin ground state in an Mn-12 single-molecule magnet with a low-symmetry loop structure. Angew. Chem. Int. Edn 44, 897-901 (2005).
30. Dugan, D. M. & Hendrickson, D. N. Magnetic exchange interactions in transition-metal dimers 3: Nickel (II) di-μ-cyanato, μ-thiocyanato, and di-μ-selenocyanato complexes and related outer-sphere copper (II) complexes. Inorg. Chem. 13, 2929-2940 (1974).
31. Bonesteel, N. E. Theory of anisotropic superexchange in insulating cuprates. Phys. Rev. B 47, 11302-11313 (1993).