No you cannot. As a PhD student I thought you would have done some research yourself first before asking..but anyway, here we go.
In order to get Canadian citizenship you need:
You must have permanent resident (PR) status in Canada, have no unfulfilled conditions related to that status, and your PR status must not be in question. This means you must not:
be under review for immigration or fraud reasons, or
be under a removal order (an order from Canadian officials to leave Canada), or
have certain unfulfilled conditions related to your PR status.
You do not need to have a PR card to apply for citizenship. If you have a PR card, but it is expired, you can still apply for citizenship.
Time you have lived in Canada
You must have been physically present in Canada as a permanent resident for at least 1,460 days during the six years immediately before the date of your application. You must also be physically present for at least 183 days during each of four calendar years that are fully or partially within the six years immediately before the date of application. These requirements do not apply to children under 18.