5 papers
Theory of universal Planckian metal in t-J model: application for high-Tc cuprate superconductors
Yung-Yeh Chang, Khoe Van Nguyen, Kimberly Remund +1
The mysterious quantum-critical Planckian bad metal phase with perfect T-linear resistivity persisting beyond the quasi-particle limit and universal T-linear scattering rate has be…
Quasi-two-dimensional spin helix and magnon-induced singularity in twisted bilayer graphene
Yung-Yeh Chang, Kazuma Saito, Chen-Hsuan Hsu
Twisted bilayer graphene exhibits prominent correlated phenomena in two distinct regimes: a Kondo lattice near the magic angle, resembling heavy fermion systems, and a triangular c…
The scaled-invariant Planckian metal and quantum criticality in CeNdCoIn
Yung-Yeh Chang, Hechang Lei, C. Petrovic +1
Perfect -linear resistivity associated with universal scattering rate: with , so-called Planckian metal state, has been observed in the normal state…
Quantum phase transition in a two-dimensional Kondo-Heisenberg model: a Schwinger-boson large-N approach
Jiangfan Wang, Yung-Yeh Chang, Chung-Yu Mou +2
Strange metal behavior arises in heavy fermion metals close to antiferromagnetic transitions. An increasing amount of experiments indicates a link of such behavior to a Kondo break…
Strange superconductivity near an antiferromagnetic heavy fermion quantum critical point
Y. Y. Chang, F. Hsu, S. Kirchner +3
The heavy fermion CeMIn5 family with M = Co, Rh, Ir provide a prototypical example of strange superconductors with unconventional d-wave pairing and strange metal normal state, eme…