TY - JOUR
T1 - Microwave-assisted reversal of a single electron spin
AU - Godfrin, Clément
AU - Lumetti, Stefano
AU - Biard, Hugo
AU - Bonet, Edgar
AU - Klyatskaya, Svetlana
AU - Ruben, Mario
AU - Candini, Andrea
AU - Affronte, Marco
AU - Wernsdorfer, Wolfgang
AU - Balestro, Franck
PY - 2019/4/14
Y1 - 2019/4/14
N2 - The dynamics of a quantum system in a dissipative environment presents a rich and still largely unexplored phenomenology that is relevant for the control of quantum devices. The simplest problem can be modeled as a two-level system—such as a spin—in contact with a thermal bath. Here, we present experiments in which we monitor the spin reversal in a TbPc2 single-molecule spin transistor, and we show that the application of microwave pulses can cause the spin to flip between its two lowest-lying states (|↑⟩ and |↓⟩) at a rate that increases with increasing duration and power of the pulses. This process is neither resonant nor coherent with the microwave pulses. Moreover, an asymmetry appears in the |↓⟩→|↑⟩ and |↑⟩→|↓⟩ transition probabilities, suggesting that the process occurs out of equilibrium. We explain the experimental results and provide an estimate of the local temperature increase induced by the microwave pulses by means of a model that takes into account the energy exchange between the single Tb3+ electron spin and the local environment.
AB - The dynamics of a quantum system in a dissipative environment presents a rich and still largely unexplored phenomenology that is relevant for the control of quantum devices. The simplest problem can be modeled as a two-level system—such as a spin—in contact with a thermal bath. Here, we present experiments in which we monitor the spin reversal in a TbPc2 single-molecule spin transistor, and we show that the application of microwave pulses can cause the spin to flip between its two lowest-lying states (|↑⟩ and |↓⟩) at a rate that increases with increasing duration and power of the pulses. This process is neither resonant nor coherent with the microwave pulses. Moreover, an asymmetry appears in the |↓⟩→|↑⟩ and |↑⟩→|↓⟩ transition probabilities, suggesting that the process occurs out of equilibrium. We explain the experimental results and provide an estimate of the local temperature increase induced by the microwave pulses by means of a model that takes into account the energy exchange between the single Tb3+ electron spin and the local environment.
UR - http://dx.doi.org/10.1063/1.5064593
U2 - 10.1063/1.5064593
DO - 10.1063/1.5064593
M3 - Article
SN - 0021-8979
JO - Journal of Applied Physics
JF - Journal of Applied Physics
ER -