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.

引用

页数：4

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