English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 6507/11669
造訪人次 : 29954048      線上人數 : 546
RC Version 3.2 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
搜尋範圍 進階搜尋

請使用永久網址來引用或連結此文件: http://ir.ncue.edu.tw/ir/handle/987654321/14100

題名: Low-energy Properties of the Ferromagnetic Metallic Phase in Manganites: Slave-fermion Approach to the Quantum Double-exchange Model
作者: Lee, Yu-Li;Lee, Yu-Wen
貢獻者: 物理學系
日期: 2007
上傳時間: 2012-09-10T06:08:03Z
出版者: The American Physical Society
摘要: We study the low-energy properties of the one-orbital quantum double-exchange model by using the slave fermion formulation. We construct a mean-field theory which gives a simple explanation for the magnetic and thermodynamic properties of the ferromagnetic metallic phase in manganites at low energy. The resulting electron spectral function and tunneling density of states show an incoherent asymmetric peak with weak temperature dependence, in addition to a quasiparticle peak. We also show that the gauge fluctuations in the ferromagnetic metallic phase are completely screened due to the Anderson-Higgs mechanism. Therefore, the mean-field state is robust against gauge fluctuations and exhibits spin-charge separation at low energy.
關聯: Phys. Rev. B, 75(6): 064411
顯示於類別:[物理學系] 期刊論文

文件中的檔案:

檔案 大小格式瀏覽次數
index.html0KbHTML665檢視/開啟


在NCUEIR中所有的資料項目都受到原著作權保護.

 

DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - 回饋