Quantum magnetism in molecular spin ladders probed with muon-spin spectroscopy [dataset]

Scheuermann, Robert (Paul Scherrer Institut, Switzerland); Ruegg, Christian (Paul Scherrer Institut, Switzerland); Manson, Jamie (Eastern Washington University, US); Goko, Tatsuo (Paul Scherrer Institut, Switzerland); Ward, Simon (Paul Scherrer Institut, Switzerland); Blundell, Stephen,  (Oxford University, UK); Williams, Robert (Durham University, UK); Xiao, Fan (Paul Scherrer Institut, Switzerland); Kramer, Karl (University of Bern, Switzerland); Lancaster, Tom (Durham University, UK); Clark, Stewart (Durham Univeristy, UK); Huddart, Ben (Durham University, UK); Pratt, Francis (ISIS Facility, UK)

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Quantum magnetism in molecular spin ladders probed with muon-spin spectroscopy [dataset] Open Access

We present the results of muon-spin spectroscopy (μ+SR) measurements on the molecular spin ladder system (Hpip)2CuBr4(1−x)Cl4x, [Hpip=(C5H12N)]. 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)2CuBr4. Comparison of our results to those of the dimer-based molecular magnet Cu(pyz)(gly)(ClO4) shows several common features. We locate the crossovers in partially disordered (Hpip)2CuBr4(1−x)Cl4x (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)2CuBr4 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)2CuCl4 to that of the strong-leg material (C7H10N)2CuBr4 (known as DIMPY) and demonstrate that our results are in agreement with predictions based on interacting fermionic quasiparticle excitations in these materials.

Descriptions

Resource type: Dataset
Contributors: Creator: Lancaster, Tom ¹
Creator: Xiao, Fan ²
Creator: Huddart, Ben ¹
Creator: Williams, Robert ¹
Creator: Pratt, Francis ³
Creator: Blundell, Stephen, ⁴
Creator: Clark, Stewart ⁵
Creator: Scheuermann, Robert ²
Creator: Goko, Tatsuo ²
Creator: Ward, Simon ²
Creator: Manson, Jamie ⁶
Creator: Ruegg, Christian ²
Creator: Kramer, Karl ⁷

¹ Durham University, UK
² Paul Scherrer Institut, Switzerland
³ ISIS Facility, UK
⁴ Oxford University, UK
⁵ Durham Univeristy, UK
⁶ Eastern Washington University, US
⁷ University of Bern, Switzerland
Funder: Engineering and Physical Sciences Research Council
Science and Technology Facilities Council
Research methods: Muon-spin spectroscopy
Density functional theory
Other description
Keyword: Spin ladders
Muon spectroscopy
Quantum phase transitions
Muon site determination
Luttinger liquid parameters
Luttinger liquids
Quantum magnetism
Subject: Quantum theory
Condensed matter
Location
Language
Cited in: T. Lancaster et al., 2018 New J. Phys. 20 103002
http://iopscience.iop.org/article/10.1088/1367-2630/aae21a/meta
Identifier: ark:/32150/r11r66j1142
doi:10.15128/r11r66j1142
Rights: Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC)
Publisher: Durham University
Date Created

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