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 (email@example.com or firstname.lastname@example.org)
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).