| Autor: |
T Lancaster, F Xiao, B M Huddart, R C Williams, F L Pratt, S J Blundell, S J Clark, R Scheuermann, T Goko, S Ward, J L Manson, Ch Rüegg, K W Krämer |
| Jazyk: |
angličtina |
| Rok vydání: |
2018 |
| Předmět: |
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| Zdroj: |
New Journal of Physics, Vol 20, Iss 10, p 103002 (2018) |
| Druh dokumentu: |
article |
| ISSN: |
1367-2630 |
| DOI: |
10.1088/1367-2630/aae21a |
| Popis: |
We present the results of muon-spin spectroscopy ( μ ^+ SR) measurements on the molecular spin ladder system (Hpip) _2 CuBr _4(1− _x _) Cl _4 _x , [Hpip = (C _5 H _12 N)]. Using transverse field μ ^+ SR we are able to identify characteristic behaviour in each of the regions of the phase diagram of the x = 0 strong-rung spin ladder system (Hpip) _2 CuBr _4 . Comparison of our results to those of the dimer-based molecular magnet Cu(pyz)(gly)(ClO _4 ) shows several common features. We locate the crossovers in partially disordered (Hpip) _2 CuBr _4(1− _x _) Cl _4 _x ( x = 0.05), where a region of behaviour intermediate between quantum disordered and Luttinger liquid-like is identified. Our interpretation of the results incorporates an analysis of the probable muon stopping states in (Hpip) _2 CuBr _4 based on density functional calculations and suggests how the muon plus its local distortion can lead to a local probe unit with good sensitivity to the magnetic state. Using longitudinal field μ ^+ SR we compare the dynamic response of the x = 1 strong-rung material (Hpip) _2 CuCl _4 to that of the strong-leg material (C _7 H _10 N) _2 CuBr _4 (known as DIMPY) and demonstrate that our results are in agreement with predictions based on interacting fermionic quasiparticle excitations in these materials. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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