Magnetism of the N =42 kagome lattice antiferromagnet

Schnack J, Schulenburg J, Richter J (2018)
PHYSICAL REVIEW B 98(9): 094423.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Autor/in
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Abstract / Bemerkung
For the paradigmatic frustrated spin-half Heisenberg antiferromagnet on the kagome lattice we performed large-scale numerical investigations of thermodynamic functions by means of the finite-temperature Lanczos method for system sizes of up to N = 42. We present the dependence of magnetization as well as specific heat on temperature and external field and show in particular that a finite-size scaling of specific heat supports the appearance of a low-temperature shoulder below the major maximum. This seems to be the result of a counterintuitive motion of the density of singlet states towards higher energies. Other interesting features that we discuss are the asymmetric melting of the 1/3 magnetization plateau as well the field dependence of the specific heat that exhibits characteristic features caused by the existence of a flat one-magnon band. By comparison with the unfrustrated square-lattice antiferromagnet the tremendous role of frustration in a wide temperature range is illustrated.
Erscheinungsjahr
2018
Zeitschriftentitel
PHYSICAL REVIEW B
Band
98
Ausgabe
9
Art.-Nr.
094423
ISSN
2469-9950
eISSN
2469-9969
Page URI
https://pub.uni-bielefeld.de/record/2931495

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Schnack J, Schulenburg J, Richter J. Magnetism of the N =42 kagome lattice antiferromagnet. PHYSICAL REVIEW B. 2018;98(9): 094423.
Schnack, J., Schulenburg, J., & Richter, J. (2018). Magnetism of the N =42 kagome lattice antiferromagnet. PHYSICAL REVIEW B, 98(9), 094423. doi:10.1103/PhysRevB.98.094423
Schnack, J., Schulenburg, J., and Richter, J. (2018). Magnetism of the N =42 kagome lattice antiferromagnet. PHYSICAL REVIEW B 98:094423.
Schnack, J., Schulenburg, J., & Richter, J., 2018. Magnetism of the N =42 kagome lattice antiferromagnet. PHYSICAL REVIEW B, 98(9): 094423.
J. Schnack, J. Schulenburg, and J. Richter, “Magnetism of the N =42 kagome lattice antiferromagnet”, PHYSICAL REVIEW B, vol. 98, 2018, : 094423.
Schnack, J., Schulenburg, J., Richter, J.: Magnetism of the N =42 kagome lattice antiferromagnet. PHYSICAL REVIEW B. 98, : 094423 (2018).
Schnack, Jürgen, Schulenburg, Joerg, and Richter, Johannes. “Magnetism of the N =42 kagome lattice antiferromagnet”. PHYSICAL REVIEW B 98.9 (2018): 094423.