59 citations · 143 across the 15 of their papers we have counts for
15 papers
Matter fields near quantum critical point in (2+1)-dimensional U(1) gauge theory
Guo-Zhu Liu, Wei Li, Geng Cheng
We study chiral phase transition and confinement of matter fields in (2+1)-dimensional U(1) gauge theory of massless Dirac fermions and scalar bosons. The vanishing scalar boson ma…
Paring instability in the mixed state of d-wave superconductor
Hua Jiang, Guo-Zhu Liu, Geng Cheng
We propose that an excitonic gap can be generated along nodal directions by Coulomb interaction in the mixed state of d-wave cuprate superconductors. In a superconductor, the Coulo…
Interaction and excitonic insulating transition in graphene
Guo-Zhu Liu, Wei Li, Geng Cheng
The strong long-range Coulomb interaction between massless Dirac fermions in graphene can drive a semimetal-insulator transition. We show that this transition is strongly suppresse…
Understanding cuprate superconductors with spontaneous nodal gap generation
Guo-Zhu Liu, Geng Cheng
We study the spontaneous gap generation for gapless nodal fermions within an effective gauge field theory of high temperature superconductors. When superconductivity appears, the g…
Effect of gauge boson mass on chiral symmetry breaking in QED
Guo-Zhu Liu, Geng Cheng
In three-dimensional quantum electrodynamics (QED) with massive gauge boson, we investigate the Dyson-Schwinger equation for the fermion self-energy in the Landau gauge and f…
Competing orders in high-T_c superconductors
Guo-Zhu Liu, Geng Cheng
Within a (2+1)-dimensional U(1) gauge field theory, after calculating the Dyson-Schwinger equation for fermion self-energy we find that chiral symmetry breaking (CSB) occurs if the…