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arXiv 1304.7631cond-mat.mes-hall
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分数量子霍尔效应的复合粒子(玻色子、费米子)理论

Composite-particles (Boson, Fermion) Theory of Fractional Quantum Hall Effect

Shigeji Fujita, Akira Suzuki, H. C. Ho

摘要:

本文用复合玻色子(费米子)描述分数量子霍尔效应,每个玻色子含有一个导电电子和一个奇(偶)数的磁通子。QHE的原因是通过假设传导电子(“电子”,“空穴”)和磁通子(磁通量的量子)之间的声子交换吸引。我们假设具有\emph{any}偶数个磁通子的c-费米子具有等于电子电荷\emph{any}的有效电荷(大小)。具有$m$通量子的c-费米子的密度$n_ϕ^{(m)}$通过$n_ϕ^{(m)}=n_{\mathrm e}/m$与电子密度$n_{\mathrm e}$相关联,这意味着更高的$m$更难形成,从而产生霍尔电导率$σ_{\mathrm H}\equiv j/E_{\mathrm H}$的正确值$me^2/h$。对于凝聚的c-玻色子,具有$m$通量子的c-玻色子密度$n_ϕ^{(m)}$与玻色子密度$n_0$通过$n_ϕ^{(m)}=n_0/m$联系起来。这产生了磁导率的$σ_{\mathrm H}=m\,e^2/h$,即在填充因子$ν=1/m$($m=$奇数)下观察到的QHE值。本文没有借用Laughlin关于分数电荷的理论和结果。

英文摘要:

A quantum statistical theory is developed for a fractional quantum Hall effects in terms of composite bosons (fermions) each of which contains a conduction electron and an odd (even) number of fluxons. The cause of the QHE is by assumption the phonon exchange attraction between the conduction electron ("electron", "hole") and fluxons (quanta of magnetic fluxes). We postulate that c-fermions with \emph{any} even number of fluxons have an effective charge (magnitude) equal to the electron charge $e$. The density of c-fermions with $m$ fluxons, $n_ϕ^{(m)}$, is connected with the electron density $n_{\mathrm e}$ by $n_ϕ^{(m)}=n_{\mathrm e}/m$, which implies a more difficult formation for higher $m$, generating correct values $me^2/h$ for the Hall conductivity $σ_{\mathrm H}\equiv j/E_{\mathrm H}$. For condensed c-bosons the density of c-bosons-with-$m$ fluxons, $n_ϕ^{(m)}$, is connected with the boson density $n_0$ by $n_ϕ^{(m)}=n_0/m$. This yields $σ_{\mathrm H}=m\,e^2/h$ for the magnetoconductivity, the value observed of the QHE at filling factor $ν=1/m$ ($m=$odd numbers). Laughlin's theory and results about the fractional charge are not borrowed in the present work.

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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