4.6 Article

Spin dynamics of the one-dimensional double chain spin-1/2 antiferromagnet KNaCuP2O7

期刊

PHYSICAL REVIEW B
卷 105, 期 17, 页码 -

出版社

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.105.174442

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资金

  1. Ministry of Science and Technology in Taiwan [MOST 106-2119-M-002-035MY3, MOST-110-2112-M-001-065-MY3]
  2. Academia Sinica [AS-iMATE-111-12]
  3. National Research Foundation (NRF) of Korea [2020R1A2C3012367, 2020R1A5A1016518]

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We combine μSR technique with thermodynamic measurements to explore the spin dynamics of one-dimensional S = 1/2 antiferromagnetic double chain KNaCuP2O7. Results show that the high-temperature diffusive spin transport turns into ballistic behavior below 30K. In addition, longitudinal-field μSR varies hardly with an external magnetic field.
We combine a muon spin relaxation (mu SR) technique with thermodynamic measurements to explore the spin dynamics of one-dimensional (1D) S = 1/2 antiferromagnetic double chain KNaCuP2O7. Static magnetic susceptibility and specific heat are well described by a uniform 1D spin chain model with the intrachain interaction J/k(B) approximate to 55 K and small interchain interactions. Spin excitations probed by zero-field mu SR evince that high-temperature diffusive spin transport turns into ballistic behavior with decreasing temperature below 30 K. In addition, we observe that longitudinal-field mu SR varies hardly with an external magnetic field. The field-independent dynamical spin susceptibility disagrees with diffusive or ballistic behaviors.

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