173 citations · 1.3k across the 56 of their papers we have counts for
7 papers · 1 filter
Three dimensional collective charge excitations in electron-doped cuprate superconductors
M. Hepting, L. Chaix, E. W. Huang +17
High temperature cuprate superconductors consist of stacked CuO2 planes, with primarily two dimensional electronic band structures and magnetic excitations, while superconducting c…
Superconductivity-Induced Changes in Density-Density Correlation Function Enabled by Umklapp Processes
Wei-Cheng Lee
Motivated by the mid-infrared scenario for high-temperature superconductivity proposed by Leggett, the effects of Umklapp processes on the density-density correlation function in t…
Elementary Excitations due to Orbital Degrees of Freedom in Iron Based Superconductors
Wei-Cheng Lee, Weicheng Lv, Hamood Z. Arham
One central issue under intense debate in the study of the iron based superconductors is the origin of the structural phase transition that changes the crystal lattice symmetry fro…
Orbital Resonance Mode in Superconducting Iron Pnictides
Wei-Cheng Lee, Philip W. Phillips
We show that the fluctuations associated with ferro orbital order in the and orbitals can develop a sharp resonance mode in the superconducting state with a nodel…
Phase soliton and pairing symmetry of a two-band superconductor: Role of the proximity effect
Victor Vakaryuk, Valentin Stanev, Wei-Cheng Lee +1
We suggest a mechanism which promotes the existence of a phase soliton -- topological defect formed in the relative phase of superconducting gaps of a two-band superconductor with…
Frustrated Cooper pairing and the -wave supersolidity
Hsiang-hsuan Hung, Wei-Cheng Lee, Congjun Wu
Geometric frustration in quantum magnetism refers to that magnetic interactions on different bonds cannot be simultaneously minimized. The usual Cooper pairing systems favor the un…
Pairing State with a time-reversal symmetry breaking in FeAs based superconductors
Wei-Cheng Lee, Shou-Cheng Zhang, Congjun Wu
We investigate the competition between the extended -wave and -wave pairing order parameters in the iron-based superconductors. Because of the frustrating pai…