...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Physica, C. Superconductivity and its applications >Electronic spectra of optimal doped bilayer and trilayer high-T-c cuprate superconductors
【24h】

Electronic spectra of optimal doped bilayer and trilayer high-T-c cuprate superconductors

机译：最佳掺杂双层和三层高T-c铜酸盐超导体的电子光谱

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We present the calculation of the electronic spectral function and density of states in the optimal and overdoped bilayer and trilayer cuprates (like Bi2Sr2CaCU2O8+x, and Bi(2)Sr(2)Ca(2)Cu3O(10+x)) as a function of interlayer coupling in d-wave superconducting state. We have used the multilayer tight binding attractive Hubbard Hamiltonian containing the momentum dependent interlayer coupling parameter to obtain the expressions of single particle spectral function and density of states within BCS-mean-field Green's function equations of motion approach for bilayer and trilayer superconducting cuprates. On the basis of numerical computation, it has been found that the coupling between the cuprates plane within the unit cell is responsible for the splitting of bonding and antibonding bands in the electronic spectral function at (pi, 0) point of Brillouin zone for optimal doped bilayer cuprates, while a trilayer splitting in the spectral function at (pi, 0) point is pointed out in the form of bonding, non-bonding and antibonding bands in optimal doped trilayer cuprates in superconducting state. These findings are in qualitative agreement with the recent photoemission spectroscopic measurements in superconducting bilayer and trilayer cuprates. We have also computed numerically the density of states in optimal and overdoped bilayer and trilayer cuprates in the superconducting state and predicted the splitting of coherence peak in the density of states as a manifestation of bilayer and trilayer couplings. The variation of density of states found to be in agreement with the recent tunneling measurements in multilayered cuprates in superconducting state. (c) 2005 Elsevier B.V. All rights reserved.
机译：我们以最佳和超掺杂的双层和三层铜酸盐（如Bi2Sr2CaCU2O8 + x和Bi（2）Sr（2）Ca（2）Cu3O（10 + x））的形式给出电子光谱函数和状态密度的计算。 d波超导状态下层间耦合作用我们已使用包含动量依赖层间耦合参数的多层紧密结合吸引力哈伯德哈密顿量来获得双层和三层超导铜酸盐运动方法的BCS平均场格林函数方程中的单粒子光谱函数表达式和状态密度。在数值计算的基础上，已经发现，晶胞内铜酸盐平面之间的耦合负责在布里渊区（pi，0）点的电子光谱函数中键合带和反键带的分裂，以实现最佳掺杂指出了在（pi，0）点处的光谱函数中发生三层分裂的情况，这是在超导状态的最佳掺杂三层铜酸盐中以键合，非键合和反键带的形式指出的。这些发现与最近在超导双层和三层铜酸盐中的光发射光谱测量结果在质量上一致。我们还通过数值计算了超导状态下最佳和超掺杂的双层和三层铜酸盐中的态密度，并预测了态密度中相干峰的分裂，这是双层和三层耦合的体现。发现状态密度的变化与超导状态下多层铜酸盐中最近的隧穿测量一致。 （c）2005 Elsevier B.V.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号