Spin waves and electronic interactions in La2CuO4

被引：540

作者：

Coldea, R

Hayden, SM

Aeppli, G

Perring, TG

Frost, CD

Mason, TE

Cheong, SW

Fisk, Z

机构：

[1] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

[2] Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England

[3] Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England

[4] NEC Res Inst, Princeton, NJ 08540 USA

[5] Lucent Technol, Murray Hill, NJ 07974 USA

[6] Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 23期

关键词：

D O I：

10.1103/PhysRevLett.86.5377

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The magnetic excitations of the square-lattice spin-1/2 antiferromagnet and high-ir, parent compound La2CuO4 are determined using high-resolution inelastic neutron scattering. Sharp spin waves with absolute intensities in agreement with theory including quantum corrections are found throughout the;Brillouin zone. The observed dispersion relation shows evidence for substantial interactions beyond the nearest-neighbor Heisenberg term which can be understood in terms of a cyclic or ring exchange due to the; strong hybridization path around the CU4O4 square plaquettes.

引用

页码：5377 / 5380

页数：4

共 31 条

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