2024-08-13T06:26:56Z
https://icatisis.esc.rl.ac.uk/oaipmh/request
oai:icatisis.esc.rl.ac.uk:inv/109731017
2020-06-11T11:47:19.835Z
doiInvs
4.3
BL.ISIS
https://doi.org/10.5286/ISIS.E.RB1820151-2
1820151
Professor Stephen Blundell
Stephen
Blundell
Dr Murray Wilson
Murray
Wilson
Dr Mark Telling
Mark
Telling
Dr Matjaz Gomilsek
Matjaz
Gomilsek
Professor Tom Lancaster
Tom
Lancaster
Dr Francis Pratt
Francis
Pratt
Dr Ben Huddart
Ben
Huddart
Professor Jamie Manson
Jamie
Manson
Dr Thomas Hicken
Thomas
Hicken
The nature of excitations in a molecular Haldane system
ISIS Neutron and Muon Source
2023
T=1.35
T=110
T=10.0
T=287
tf20
cooling
F=25000.0
T=0.23
2x
packets
3x25um
T=110.0
T=115.0
F=20.0
T=55.0
T=100.0
T=175.0
4x
um
foil.
Cooling
T=0.14
T=1.0
T=0.19
T=1.11
T=112.5
T=120.0
T=150.0
F=26000.0
T=0.12
T=1.65
zfc
F=0
T=140.0
F=55.0
T=15.0
T=45.0
T=107.5
T=117.5
T=135.0
F=610.0
T=20.0
Physics
T=105.0
T=125.0
Haldane
T=0.02
F=0.0
Slits=10
T=0.08
F=30000.0
F=35000.0
T=0.16
F=125.0
F=360.0
F=1345.0
F=2270.0
F=795.0
F=3845.0
F=5000.0
T=25.0
T=80.0
T=85.0
F=95.0
T=30.0
T=70.0
F=40.0
unknown
field
history
F=35.0
F=75.0
F=165.0
F=215.0
F=1745.0
CrNb3S6
T=300.0
slits=10
4x25um
Ag
foil
remounted
sample
ignore
F=5.0
T=122.5
T=130.0
F=100.0
T=0.35
T=0.42
T=2.0
T=2.5
x
F=2955.0
T=0.29
T=0.51
T=50.0
T=65.0
T=0.1
F=1030.0
T=75.0
T=102.5
T=0.92
T=0.62
T=0.76
T=60.0
T=95.0
beam
issue
(potential
alpha
change)
F=25.0
F=45.0
F=275.0
T=40.0
T=285.0
4
25
micron
foils
F=470.0
T=90.0
T=35.0
T=7.0
T=160.0
T=170.0
T=205.0
All
previous
runs
wrong
T
calibration
F=15.0
F=30.0
CrTa3S6
Not
true
ZF
(post
quench)
T=12.5
T=145.0
T=200.0
2020-02-13T08:30:00Z/2020-02-24T08:41:16Z
2020-02-24T08:41:16Z
Dataset
CC-BY Attribution 4.0 International
It is well known that an S = 1 antiferromagnetic spin chain is predicted to have a quantum disordered ground state and a gap in its excitation spectrum. This so-called Haldane gap is topological in origin and contrasts dramatically with the case for S = 1/2, whose topology leads to a gapless spectrum. We have recently synthesised an intriguing new series based on S = 1 NiX2(3,5-lutidine)4 molecular complexes formed from quasi-one-dimensional columns of Ni-X...X-Ni. In an experiment at PSI in 2017 we showed that NiI2(3,5-lutidine)4 remains disordered down to 30 mK, suggesting that the system is a highly successful realization of a Haldane chain system. We now plan to investigate the order and dynamics of the system in high field as we close the spin gap and drive the system through a quantum critical point (QCP) in a new experiment, only possible using the HIFI spectrometer at ISIS.