2004/10/31 by Tiago C. Ribeiro, Xiao-Gang Wen · 39 citations
Engineering · Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Cuprate #Mean field theory #Phase (matter) #Phase diagram #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Quasiparticle #Spinon #Superconducting Materials and Applications #Superconductivity #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.95.057001
published in Physical Review Letters 95(5), 057001 (American Physical Society) · 4 pages, 2 figures. Homepage http://dao.mit.edu/~wen/
openalex publication_date 2005/07/26 · arxiv created 2005/07/27 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We introduce a new mean-field approach to the tt't''J model that incorporates both electron-like quasiparticle and spinon excitations as suggested by some experiments and numerical studies. It leads to a mean-field phase diagram which is consistent with that of hole and electron doped cuprates. Moreover, it provides a framework to describe the observed evolution of the electron spectral function from the undoped insulator to the overdoped Fermi metal for both hole and electron doping. The theory also provides a new non-BCS mechanism leading to superconductivity.