Ferromagnetic spin polaron on complex lattices

被引：17

作者：

Berciu, Mona ^{[1
]}

Sawatzky, George A. ^{[1
]}

机构：

[1] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 19期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Brillouin zones; exchange interactions (electron); ferromagnetic materials; Heisenberg model; lanthanum compounds; magnetic thin films; polarons; MAGNETIC POLARON; SUPERCONDUCTIVITY; SEMICONDUCTORS; CRYSTAL;

D O I：

10.1103/PhysRevB.79.195116

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present a simpler derivation of the exact solution of a spin polaron in a ferromagnet and generalize it to complex lattices and/or longer-range exchange interactions. As a specific example, we analyze a two-dimensional MnO(2)-like lattice (as in the ferromagnetic layers in LaMnO(3)) and discuss the properties of the resulting spin polaron in various regimes. At strong couplings the solution is reminiscent of the Zhang-Rice singlet, however the electronic wave function involved in the singlet is dependent on the momentum of the singlet, and multiple bands may appear.

引用

页数：11

共 20 条

[1] THE RESONATING VALENCE BOND STATE IN LA2CUO4 AND SUPERCONDUCTIVITY [J].

ANDERSON, PW .

SCIENCE, 1987, 235 (4793) :1196-1198

[2] POSSIBLE HIGH-TC SUPERCONDUCTIVITY IN THE BA-LA-CU-O SYSTEM [J].

BEDNORZ, JG ;

MULLER, KA .

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1986, 64 (02) :189-193

[3] Systematic improvement of the momentum average approximation for the Green's function of a Holstein polaron [J].

Berciu, Mona ;

Goodvin, Glen L. .

PHYSICAL REVIEW B, 2007, 76 (16)

[4] Green's function of the Holstein polaron [J].

Goodvin, Glen L. ;

Berciu, Mona ;

Sawatzky, George A. .

PHYSICAL REVIEW B, 2006, 74 (24)

[5]

IZYUMOV YA, 1971, SOV PHYS JETP-USSR, V32, P302

[6]

MAHAN GD, 1981, MANY PARTICLE PHYS P

[7]

METHFESSEL S, 1968, HDB PHYS, P419

[8] Single-hole spectral function and spin-charge separation in the t-J model -: art. no. 033101 [J].

Mishchenko, AS ;

Prokof'ev, NV ;

Svistunov, BV .

PHYSICAL REVIEW B, 2001, 64 (03)

[9]

NAGAEV EL, 1969, SOV PHYS JETP-USSR, V29, P545

[10] THEORY OF FERROMAGNETIC SEMICONDUCTORS [J].

NOLTING, W .

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, 1979, 96 (01) :11-54

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