TY - JOUR PB - American Physical Society ID - 10.1103/Physics.3.27 TI - Dirac cone in iron-based superconductors JF - Physics JA - Physics J1 - PHYSICS VL - 3 IS - SP - 27 EP - PY - 2010/03/29/ UR - http://link.aps.org/doi/10.1103/Physics.3.27 A1 - Hasan, M. Zahid AU - Bernevig, B. Andrei ER -