The pens used for phones and tablets use specialized hardware inside the screen to detect the pen; they don't just touch the screen.
There is a Samsung pen for S Pen-enabled laptops, but considering how Chromebooks are cheaper devices, I don't think the expensive pen technology would be included. Unless your device specifically mentions supporting S Pen features, a generic stylus is what you need. Your display only detects fingers, so a stylus that acts like a finger would work. Fancy Samsung pens won't work, unless your model of Chromebook specifically states it works with S Pens; then the S Pen Creator Edition would work.
