The square-kagome quantum Heisenberg antiferromagnet at high magnetic fields: the localized-magnon paradigm and beyond

• Published in: Физика низких температур
• Date: 2014
• ISSN: 0132-6414
• Main Authors: Derzhko, O., Richter, J., Krupnitska, O., Krokhmalskii, T.
• Format: Article
• Language: English
• Published: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2014
• Subjects: Низкотемпеpатуpный магнетизм
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/119527
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: The square-kagome quantum Heisenberg antiferromagnet at high magnetic fields: the localized-magnon paradigm and beyond / O. Derzhko, J. Richter, O. Krupnitska, T. Krokhmalskii // Физика низких температур. — 2014. — Т. 40, № 6. — С. 662-670. — Бібліогр.: 43 назв. — англ.

We consider the spin-1/2 antiferromagnetic Heisenberg model on the two-dimensional square-kagome lattice with almost dispersionless lowest magnon band. For a general exchange coupling geometry we elaborate low-energy effective Hamiltonians which emerge at high magnetic fields. The effective model to...