## Welcome to Quantum Materials Laboratory (QML)

**We are looking for highly motivated M.S. and Ph.D candidates. Any students who are interested in quantum nature of materials and their functionality, please contact Prof. H.-J. Kim (hjkim76@daegu.ac.kr or riddler76817@gmail.com)**

**Identification of a Weyl metal and negative longitudinal MR in Bi1-xSbx **

A topological phase transition occurs from a band insulator (x < 3%) to a topological insular (x > 3%) around x ≈ 3% and a Dirac metal is realized at this critical concentration. Applying magnetic fields, a single Dirac cone is split into a pair of Weyl cones. This is the Weyl metallic state.

Physical Review Letters **111**, 246603 (2013)

**Violation of Ohm’s law in a Weyl metal**

The I–V curves measured at B=0 (left axis, black line) and B=9T for both longitudinal (left axis, red line) and transverse (right axis, green line) configurations at T=5K.

Nature Materials **16**, 1096 (2017).