\begin{tikzpicture}
\pgfplotsset{every x tick label/.append style={font=\tiny, yshift=0.5ex}}
\pgfplotsset{every y tick label/.append style={font=\tiny, xshift=0.5ex}}
\begin{axis}[
    xmin=-6,
    xmax=12,
    ymin=-2,
    ymax=10,
		xtick = {0},
		ytick = {0},
    axis equal,
    axis lines=middle,
    disabledatascaling]



\node[font=\tiny] at (axis cs:0,10) [anchor=north east] {$iR$};
\node[font=\tiny] at (axis cs:10,0) [anchor=north east] {$R$};

\node[fill=black,draw,rounded corners,circle, scale=0.15] at (180/3:1cm) {};
\node[font=\tiny] at (180/3:1cm)[anchor = north west] {$r_2 = e^{i\pi/3}$};

\node[fill=black,draw,rounded corners,circle, scale=0.15] at (180:1cm) {};
\node[font=\tiny] at (180:1cm)[anchor = south east] {$r_1 = -1$};


\node[fill=black,draw,rounded corners,circle, scale=0.15] at (-180/3:1cm) {};
\node[font=\tiny] at (-180/3:1cm)[anchor = north west] {$r_3 =e^{-i\pi/3}$};



\node[font=\tiny] at (axis cs:9,11) [anchor=north west] {$\mathbb{C}$};

\node[font=\tiny] at (180/3.5: 4cm) [anchor=north west] {$\Gamma$};


\begin{scope}[thick,decoration={
    markings,
    mark=at position 0.5 with {\arrow{>}}}
    ] 

		\draw [blue, domain=0:90, postaction={decorate}] plot ({10*cos(\x)}, {10*sin(\x)});

		\draw[-][blue][opacity=0.9, postaction={decorate}] (axis cs:0, 0) -- (axis cs:10, 0);
		\draw[-][blue][opacity=0.9, postaction={decorate}] (axis cs:0, 10) -- (axis cs:0, 0);

	\draw[-][red][opacity=0.9, very thick] (axis cs:0, 0) -- (axis cs:0, -5);


\end{scope}


\end{axis}
\end{tikzpicture}