Local field dynamics in a resonant quantum tunneling system of magnetic molecules

T. Ohm; C. Sangregorio; C. Paulsen

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Local field dynamics in a resonant quantum tunneling system of magnetic molecules

机译：磁性分子共振量子隧穿系统中的局部场动力学

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We observed non-exponential relaxation for a quantum tunneling molecular magnetic system at very low temperatures and argue that it results from evolving intermolecular dipole fields. At the very beginning of the relaxation, the magnetization follows a square-root time dependence. A simple model is developed for the intermediate time range that is in good agreement with the data over 4 decades in time. Detailed numerical calculations as well as measurements are presented which indicate unusual correlation effects in these systems.

机译：我们在非常低的温度下观察到了量子隧穿分子磁性系统的非指数弛豫，并认为这是由于分子间偶极场的发展所致。在松弛的最开始，磁化遵循平方根时间依赖性。针对中间时间范围开发了一个简单的模型，该模型与4个时间段内的数据非常吻合。介绍了详细的数值计算和测量结果，这些结果表明了这些系统中的异常关联效应。

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《Zeitschrift fur Physik, B. Condensed Matter》 |1998年第2期|共5页
作者
T. Ohm; C. Sangregorio; C. Paulsen;
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正文语种 eng
中图分类物理学;
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75.45.+j macroscopic quantum phenomena in magnetic systems; 61.46.+w clusters; nanoparticles; and nanocrystalline materials; 75.60.Ej magnetization curves; hysteresis; Barkhausen and related effects;

机译：75.45。+ j磁性系统中的宏观量子现象;61.46。+ w团簇;纳米粒子;纳米晶体材料;75.60.Ej磁化曲线;磁滞;巴克豪森及其相关效应;

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1. Local field dynamics in a resonant quantum tunneling system of magnetic molecules [J] . T. Ohm, C. Sangregorio, C. Paulsen Zeitschrift fur Physik, B. Condensed Matter . 1998,第2期

机译：磁性分子共振量子隧穿系统中的局部场动力学
2. Non-exponential relaxation in a Resonant Quantum Tunneling System of Magnetic Molecules [J] . T. Ohm, C. Sangregorio, C. Paulsen Journal of Low Temperature Physics . 1998,第5a6期

机译：分子共振量子隧穿系统中的非指数弛豫
3. Dynamical localization of a square quantum dot molecule under magnetic and electric fields [J] . Jiang Z, Duan SQ, Zhao XG Physics Letters, A . 2004,第1a2期

机译：磁场和电场作用下方形量子点分子的动态定位
4. Aspects of the theory of resonant photoconductivity in a grid-gated double-quantum-well FET in a parallel magnetic field and transport through long organic molecules [C] . Horing, N.J.M. . 2004

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5. Quantum statistical dynamics of resonant tunneling through a quantum dot. [D] . Vaz, Eduardo V. 2006

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6. Ultrafast dynamics induced by the interaction of molecules with electromagnetic fields: Several quantum semiclassical and classical approaches [O] . Sergey V. Antipov, Swarnendu Bhattacharyya, Krystel El Hage, 2017

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7. Direct observation of resonant tunneling dynamics in high magnetic fields [O] . Heberle A.P., Oestreich M., Haacke S., 1994

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8. Strong Resonant Intersubband Magnetopolaron Effect in Heavily Modulation-Doped GaAs/AlGaAs Single Quantum Wells at High Magnetic Fields [R] . Jiang, H W, Jones, E, Lee, X Y, 1999

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Local field dynamics in a resonant quantum tunneling system of magnetic molecules

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