M. Zahid Hasan
Viewpoint
Warping the cone on a Topological Insulator
The energy-momentum relationship of electrons on the surface of an ideal topological insulator forms a cone, which, when warped, can lead to unusual phenomena such as enhanced interference around defects and a magnetically ordered exotic surface. Read More »
Viewpoint
Dirac cone in iron-based superconductors
The band structure of iron-based superconductors gives rise to yet another scenario for the appearance of Dirac fermions. Read More »
Viewpoint
Berry’s phase and quantization in topological insulators
The exactly quantized magneto-optical response of a topological insulator is a direct result of the Berry phase protected states on its surface. Read More »