Adiabatic Landau-Zener-Stückelberg transition with or without dissipation in low spin molecular system V15

Details Adiabatic Landau-Zener-Stückelberg transition with or without dissipation in low spin molecular system V15 Adiabatic Landau-Zener-Stückelberg transition with or without dissipation in low spin molecular system V15

2002-12-09

arxiv.org/abs/cond-mat/0212181v1

Phys. Rev. B - Rapid Comm., vol. 67, 020402(R),(2003)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

to appear in Phys. Rev. B - Rapid Communications

Scientific paper

10.1103/PhysRevB.67.020402

The spin one half molecular system V15 shows no barrier against spin reversal. This makes possible direct phonon activation between the two levels. By tuning the field sweeping rate and the thermal coupling between sample and thermal reservoir we have control over the phonon-bottleneck phenomena previously reported in this system. We demonstrate adiabatic motion of molecule spins in time dependent magnetic fields and with different thermal coupling to the cryostat bath. We also discuss the origin of the zero-field tunneling splitting for a half-integer spin.

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