Theoretical analysis of magnetic Raman scattering in La2CuO4: Two-magnon intensity with the inclusion of ring exchange

A. A. Katanin, A. P. Kampf

Результат исследований: Вклад в журналСтатьярецензирование

25 Цитирования (Scopus)

Аннотация

We evaluate the Raman light- scattering intensity for the square lattice Heisenberg antiferromagnet with plaquette ring exchange J. With the exchange couplings as fixed before from an accurate fit to the spin-wave dispersion in La2CuO4, leading in particular to J = 0.24J, we demonstrate in a parameter-free calculation that the inclusion of the plaquette exchange contribution to the dispersion and the magnon-magnon interaction vertex gives a peak position in B1g scattering geometry Emax = 2.71J which is in excellent agreement with the experimental data. Yet, the intrinsic width and the line shape of the two-magnon remain beyond a description in terms of a spin-only Hamiltonian.

Язык оригиналаАнглийский
Номер статьи100404
Страницы (с-по)1004041-1004044
Число страниц4
ЖурналPhysical Review B - Condensed Matter and Materials Physics
Том67
Номер выпуска10
СостояниеОпубликовано - 15 мар. 2003
Опубликовано для внешнего пользованияДа

Fingerprint

Подробные сведения о темах исследования «Theoretical analysis of magnetic Raman scattering in La2CuO4: Two-magnon intensity with the inclusion of ring exchange». Вместе они формируют уникальный семантический отпечаток (fingerprint).

Цитировать