# Using Subscripted Notation without Introducing new identifier

I would like to use subscripted notation such as $\sigma_x$ as identifiers for use as variables. In this example I am using the Pauli Matrices so that I would use notation such as: $$\sigma_x = \{\{0,1\},\{1,0\}\}$$ However, when defining the expression, two variables or identifiers are defined in my current context. Using the Names function for the context I would find that the two identifiers $\sigma$ and $x$ are both individually defined but the identifier symbol $\sigma_x$ is not defined.

How do I prevent the individual definition of the $\sigma$ and $x$ and force the definition of the ONE subscripted identifier $\sigma_x$?

Clear[σ, x];