Thermal Control of Spin Excitations in the Coupled Ising-Chain Material RbCoCl3

Mena, M.; Hänni, N.; Ward, S.; Hirtenlechner, E.; Bewley, R.; Hubig, C.; Schollwöck, U.; Normand, B.; Krämer, K. W.; McMorrow, D. F.; Rüegg, Ch. (2020). Thermal Control of Spin Excitations in the Coupled Ising-Chain Material RbCoCl3. Physical review letters, 124(25), p. 257201. American Physical Society 10.1103/PhysRevLett.124.257201

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We have used neutron spectroscopy to investigate the spin dynamics of the quantum (S ¼ 1=2) antiferromagnetic Ising chains in RbCoCl3. The structure and magnetic interactions in this material conspire to produce two magnetic phase transitions at low temperatures, presenting an ideal opportunity for thermal control of the chain environment. The high-resolution spectra we measure of two-domain-wall excitations therefore characterize precisely both the continuum response of isolated chains and the “Zeeman-ladder” bound states of chains in three different effective staggered fields in one and the same material. We apply an extended Matsubara formalism to obtain a quantitative description of the entire dataset, Monte Carlo simulations to interpret the magnetic order, and finite-temperature density-matrix renormalization-group calculations to fit the spectral features of all three phases.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute
08 Faculty of Science > Department of Chemistry, Biochemistry and Pharmaceutical Sciences (DCBP)

UniBE Contributor:

Hänni, Nora Phillys and Krämer, Karl

Subjects:

500 Science > 530 Physics
500 Science > 540 Chemistry

ISSN:

0031-9007

Publisher:

American Physical Society

Funders:

[42] Schweizerischer Nationalfonds

Language:

English

Submitter:

Karl Krämer

Date Deposited:

17 Nov 2020 15:05

Last Modified:

17 Nov 2020 17:59

Publisher DOI:

10.1103/PhysRevLett.124.257201

PubMed ID:

32639763

ArXiv ID:

1811.07178

BORIS DOI:

10.7892/boris.148067

URI:

https://boris.unibe.ch/id/eprint/148067

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