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How to approach two Dirac points experimentally and can we let these two opposite Dirac points disappear experimentally?

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I would like to get some directions about this question in solid devices and in optical lattices. Some articles are too long to read. Before I re-begin to read all of them, I would like to hear some insights from any expert.

Thanks a lot!

This post imported from StackExchange Physics at 2015-01-01 13:06 (UTC), posted by SE-user John Brown

asked Dec 31, 2014 in Experimental Physics by John Brown (5 points) [ no revision ]

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