关于 RevTex 中 \mu 的黑板粗体版本

Question

\documentclass[reprint,aps]{revtex4-1}

\usepackage{graphicx} % for pdf, bitmapped graphics files
\usepackage{graphics}
\usepackage{epsfig} % for postscript graphics files
\usepackage{mathptmx} % assumes new font selection scheme installed
\usepackage{times} % assumes new font selection scheme installed
\usepackage[bbgreekl]{mathbbol}
\usepackage{amsmath,amssymb,amsfonts} % assumes amsmath package installed
\usepackage{colortbl}
\usepackage{xcolor}
\usepackage{epstopdf}

\usepackage{arydshln}
\usepackage{bm}
\usepackage{relsize}

\usepackage{graphicx}% Include figure files
\usepackage{dcolumn}% Align table columns on decimal point
\usepackage{bm}% bold math

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\DeclareSymbolFontAlphabet{\mathbb}{AMSb}
\DeclareSymbolFontAlphabet{\mathbbl}{bbold}

嗨，我正在使用 RevTex，我需要黑板上粗体版本的小写 \mu。我尝试了一些不同的方法，这似乎是唯一有效的方法。但是，这不能打印出好看的 mu。有什么建议吗？

\begin{document}

\begin{equation}\label{eq:Ltilde_offdiagonal}
\widetilde{\mathbf{L}}(i,j)=\mathbb{M}_{0,k}+\bbmu_{(0,k)}^{(k,i)}+\bbmu_{(0,k)}^{(k,j)}+\bbmu_{(k,i)}^{(k,j)}
\end{equation}

\end{document}