Polaronic signatures in the optical properties of the electron-doped cuprate superconductor Nd2-xCexCuO4

被引：11
|
作者：
Cappelluti, E. [1 ,2 ,3 ]
Ciuchi, S. [1 ,2 ,4 ,5 ]
Fratini, S. [6 ,7 ]
机构：
[1] INFM CNR, SMC Res Ctr, I-00185 Rome, Italy
[2] INFM CNR, ISC, I-00185 Rome, Italy
[3] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy
[4] Univ Aquila, Dipartimento Fis, I-67010 Coppito, Italy
[5] Univ Aquila, CNISM, I-67010 Coppito, Italy
[6] Univ Grenoble 1, CNRS, Inst Neel, F-38042 Grenoble 9, France
[7] CSIC, Inst Ciencia Mat Madrid, E-28049 Madrid, Spain
来源：
PHYSICAL REVIEW B | 2009年 / 79卷 / 01期
关键词：
cerium compounds; doping; high-temperature superconductors; infrared spectra; magnetic polarons; neodymium compounds; optical conductivity; T-J MODEL;
D O I：
10.1103/PhysRevB.79.012502
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We investigate the temperature and doping dependences of the midinfrared band in the optical conductivity of electron-doped cuprates in terms of magnetic/lattice polaron formation. We employ dynamical mean-field theory in the context of the Holstein-t-J model for the specific case of Nd2-xCexCuO4. We find that the onset of short-range magnetic correlations at the pseudogap temperature triggers the formation of the lattice polaron responsible for the midinfrared band.
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页数：4
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