Uniaxial Strain Dependence of Tc in YBa2Cu3O7: Internal Strain Induced Intralayer Charge Transfer

بررسی اثر کرنش محوری بر روی ترابرد جریان در نانولوله کربنی دسته صندلی محدود (6 ،6)

  In this paper, the uniaxial strain effect on the electronic properties of (6,6) finite armchair carbon nanotube was investigated by using the Green function technique and Landure-Buttiker formula. It was found that, in (6,6) finite carbon nanotube with 3q and 3q+1 length, where q is a certain integer, the current was induced by the application of a suitable tensile strain and compressive stra...

EFFECT OF A COMPRESSIVE UNIAXIAL STRAIN ON THE CRITICAL CURRENT DENSITY OF GRAIN BOUNDARIES IN SUPERCONDUCTING YBa2Cu3O7-δ FILMS (POSTPRINT)

ابررسانایی دمای بالا در حالت آلاییدگی بهینه

  Intensive study of the high temperature superconductors has been ongoing for two decades. A great deal of this effort has been devoted to the underdoped regime, where the new and difficult physics of the doped Mott insulator has met extra complications including bilayer coupling/splitting, shadow bands, and hot spots. While these complications continue to unfold, in this short overview the fo...

ساختار الکترونی123- Yدر فشار متعارف و فشارهای بالا

  The electronic properties of YBa2Cu3O7-δ have been investigated by the energy-pseudopotential method within the local density approximation (LDA) with and without including generalized gradient corrections (GGC). The band structure, density of states and charge density of YBa2Cu3O7- have been calculated. The results are compared with other approaches such as LAPW, LCAO and LMTO for this syste...

Strain-controlled critical temperature in REBa2Cu3Oy-coated conductors

Recently, we succeeded in detwinning REBa2Cu3O7 (RE123, RE = rare-earth elements)-coated conductors by annealing under an external uniaxial strain. Using the untwinned RE123 tapes, the uniaxial-strain dependencies of the critical temperature Tc along the a and b crystal axes were investigated over a wide strain region from compression to tension. We found that the strain dependencies of Tc for ...