Berlin 2012 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 3: Bio- and Molecular Magnetism
MA 3.5: Vortrag
Montag, 26. März 2012, 10:30–10:45, EB 202
Coherent Manipulation of Electron Spins in a {Cu3} Spin Triangle Complex — •Choi K.-Y.1, Kumar P.2, Lemmens P.2, Bassil B. S.3, Kortz U.3, Nojiri H.4, Wang Z. X.5, Tol J. van5, and Dalal N. S.5 — 1Dpt. Physics, Chung-Ang Univ., Seoul, Korea — 2IPKM, TU-BS, Germany — 3Jacobs Univ., Bremen, Germany — 4IMR, Tohoku Univ., Sendai, Japan — 5NHMFL/FSU, Tallahassee, USA
Molecular magnets have been proposed as a promising candidate for spin-based qubits. As a test bed toward scalable qubits, we explore the isosceles antiferromagnetic spin triangle {Cu3-X} (X=As, Sb) impregnated in free standing nanoporous silicon. By using 240 GHz microwave pulses Rabi oscillations were observed and a spin memory time was measured to be T2=1066 ns at 1.5 K. This demonstrates that this hybrid material provides a promising scheme for implementing spin-based quantum gates. Comparing samples with different symmetries and environments we give evidence that spin chirality is the main decoherence source of spin triangle molecules unlike other molecular magnets. Acknowledgement: DFG and NTH