1 6 A ug 1 99 9 Is There a Unified Description of Conductivity of Layered Cuprates ? 1

2 3 A ug 1 99 9 Is There a Unified Description of Conductivity of Layered Cuprates ? 1

We present a novel approach to the analysis of the normal state in-plane σab and out-of-plane σc conductivities of anisotropic layered crystals such as oxygen deficient Y Ba2Cu3Ox. It can be shown that the resistive anisotropy is determined by the ratio of the phase coherence lengths in the respective directions; i.e., σab/σc = l 2 ab/l 2 c . From the idea that at all doping levels and temperat...

v 1 2 7 A ug 1 99 6 Interband effects in the c - axis optical conductivity in YBa

s . cl as s - ph ] 2 4 A ug 1 99 9 Unified Expressions Of All Integral Variational Principles Based On The Quantitative Causal Principle

X iv :p hy si cs /9 90 30 15 v2 [ ph ys ic s. cl as sph ] 2 4 A ug 1 99 9 Unified Expressions Of All Integral Variational Principles Based On The Quantitative Causal Principle Y. C. Huang 1,2 A. M. Li M. X. Shao X. G. Li Department of Applied Physics, Beijing Polytechnic University, Beijing 100022, P. R. China ( Email address: [email protected] ) Institute of Theoretical Physics, Chinese Acad...

ar X iv : h ep - p h / 96 08 28 3 v 1 9 A ug 1 99 6 Binding of Quarks and the πN σ - Term

It is shown that the binding effect that is associated with the short range part of the Goldstone boson exchange interaction between constituent quarks provides a good description of the πN σ-term.

ar X iv : c on d - m at / 9 31 20 89 v 1 2 2 D ec 1 99 3 Spin - gap formation in cuprates : gauge theory

We analyze the phase diagram of single and bi-layer cuprates using the gaugefield description of the t-J model. For T > TBE the in-plane fermion-pairing order parameter ∆‖ is eliminated by gauge field fluctuations, leading us to predict the absence of a spin-gap phase in single-layer cuprates. For bi-layer cuprates the inter-layer order parameter ∆⊥ is enhanced by spin correlations, and is less...