10.15128/R11R66J1142
Lancaster, Tom
Durham University, UK
Xiao, Fan
Paul Scherrer Institut, Switzerland
Huddart, Ben
Durham University, UK
Williams, Robert
Durham University, UK
Pratt, Francis
ISIS Facility, UK
Blundell, Stephen,
Oxford University, UK
Clark, Stewart
Durham Univeristy, UK
Scheuermann, Robert
Paul Scherrer Institut, Switzerland
Goko, Tatsuo
Paul Scherrer Institut, Switzerland
Ward, Simon
Paul Scherrer Institut, Switzerland
Manson, Jamie
Eastern Washington University, US
Ruegg, Christian
Paul Scherrer Institut, Switzerland
Kramer, Karl
University of Bern, Switzerland
Quantum magnetism in molecular spin ladders probed with muon-spin spectroscopy [dataset]
Durham University
2019
Durham University
Durham University
Engineering and Physical Sciences Research Council
Science and Technology Facilities Council
Quantum theory
Condensed matter
Spin ladders
Muon spectroscopy
Quantum phase transitions
Muon site determination
Luttinger liquid parameters
Luttinger liquids
Quantum magnetism
2018-09-26
Dataset
498041
application/x-gzip
Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC)
ark:/32150/r11r66j1142
T. Lancaster et al., 2018 New J. Phys. 20 103002
http://iopscience.iop.org/article/10.1088/1367-2630/aae21a/meta
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.
Muon-spin spectroscopy
Density functional theory