angular material checkbox and radio button not working properly

I am using angular material from http://ift.tt/28NHvY8 .

I followed the steps in getting started and added all dependencies. Everything works fine except checkboxes and buttons.

When I use the syntax mentioned here http://ift.tt/2lYrtS3 for checkboxes I am getting two checkboxes as shown below

Also I am not getting any ripple styles. Same thing with radio buttons. Can someone help me how to solve this?