Shafayat Hossain

2 weeks ago | nature.com | Shafayat Hossain |Zahir Muhammad |Zurab Guguchia |Jonas A. Krieger |Yu-Xiao Jiang |Maksim Litskevich | +10 more

AbstractThe interplay between topology and superconductivity generated great interest in condensed matter physics. Here, we unveil an unconventional two-dimensional superconducting state in the Dirac nodal line semimetal ZrAs2 which is exclusively confined to the top and bottom surfaces within the crystal’s ab plane.

3 weeks ago | nature.com | Shafayat Hossain |Yu-Xiao Jiang |Xian Yang |Tyler Cochran |Maksim Litskevich |Byunghoon Brian Kim | +5 more

AbstractChirality, or handedness, is ubiquitous in science, from cell biology to physics, and in condensed matter can underlie exotic phases such as chiral charge density waves and chiral superconductivity. However, detecting subtle broken symmetries that define such states is challenging, leading to debate and controversy. Here, using second-order optical response, we reveal the broken symmetries of a chiral charge density wave in the Kagome lattice KV3Sb5.