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arXiv 0812.4890cond-mat.mes-hall
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ν=1/3量子霍尔铁磁体中的回旋自旋翻转激发

Cyclotron spin-flip excitations in a ν=1/3 quantum Hall ferromagnet

A. B. Van'kov, L. V. Kulik, S. M. Dickmann, I. V. Kukushkin, V. E. Kirpichev, W. Dietsche, S. Schmult

摘要:

除了先前研究的激发之外,在ν=1/3填充周围的非弹性光散射光谱揭示了量子霍尔系统中的新型回旋自旋翻转激发。观察到的模式的激发能定性地遵循电子自旋极化的程度,在ν=1/3时达到最大值,因此将其表征为ν=1/3铁磁体本征模式。它的绝对能量大大超过了著名的单模近似理论预测。双激子修正忽略利用单模方法的激子表示的框架内进行评估,并推断是负责所观察到的效果。

英文摘要:

Inelastic light scattering spectroscopy around the ν=1/3 filling discloses a novel type of cyclotron spin-flip excitation in a quantum Hall system in addition to the excitations previously studied. The excitation energy of the observed mode follows qualitatively the degree of electron spin polarization, reaching a maximum value at ν=1/3 and thus characterizing it as a ν=1/3 ferromagnet eigenmode. Its absolute energy substantially exceeds the theoretical prediction obtained within the renowned single-mode approximation. Double-exciton corrections neglected utilizing the single-mode approach are evaluated within the framework of the excitonic representation and are inferred to be responsible for the observed effect.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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