arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0810.1757cond-mat.mes-hallcond-mat.str-el
收藏

各向同性体材料中分数量子霍尔效应的研究

Scenario for Fractional Quantum Hall Effect in Bulk Isotropic Materials

F. J. Burnell, B. Andrei Bernevig, D. P. Arovas

摘要:

研究了三维各向同性(非层状)体材料中强关联分数量子霍尔(Fractional Quantum Hall)态的可能性。我们发现,只有当电子在垂直于磁场的方向上,以磁长度的数量级的距离重新组织成层时,才能在低密度下存在一个H2O态。与分级过渡相关联的Hartree能量被3D H3OH状态的相关Fock能量抵消。我们得到了体电子在受库仑作用的磁场中随载流子密度和晶格常数变化的相图。在非常低的密度下,3D H2O H态表现出由声子相关稳定的3D维格纳晶体态的转变。

英文摘要:

We investigate the possibility of a strongly correlated Fractional Quantum Hall (FQH) state in bulk three dimensional isotropic (not layered) materials. We find that a FQH state can exist at low densities only if it is accompanied by a staging transition in which the electrons re-organize themselves in layers, perpendicular to the magnetic field, at distances of order the magnetic length apart. The Hartree energy associated to the staging transition is off-set by the correlation Fock energy of the 3D FQH state. We obtain the phase diagram of bulk electrons in a magnetic field subject to Coulomb interactions as a function of carrier density and lattice constant. At very low densities, the 3D FQH state exhibits a transition to a 3D Wigner crystal state stabilized by phonon correlations.

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。

↑