Skip to main content

Research Repository

Advanced Search

Outputs (115)

Many-body quantum muon effects and quadrupolar coupling in solids (2023)
Journal Article
Gomilšek, M., Pratt, F. L., Cottrell, S. P., Clark, S. J., & Lancaster, T. (2023). Many-body quantum muon effects and quadrupolar coupling in solids. Communications Physics, 6(1), https://doi.org/10.1038/s42005-023-01260-7

Strong quantum zero-point motion (ZPM) of light nuclei and other particles is a crucial aspect of many state-of-the-art quantum materials. However, it has only recently begun to be explored from an ab initio perspective, through several competing app... Read More about Many-body quantum muon effects and quadrupolar coupling in solids.

DFT + μ: Density functional theory for muon site determination (2023)
Journal Article
Blundell, S., & Lancaster, T. (2023). DFT + μ: Density functional theory for muon site determination. Applied Physics Reviews, 10(2), Article 021316. https://doi.org/10.1063/5.0149080

The technique of muon spin rotation (μSR) has emerged in the last few decades as one of the most powerful methods of obtaining local magnetic information. To make the technique fully quantitative, it is necessary to have an accurate estimate of where... Read More about DFT + μ: Density functional theory for muon site determination.

μSR investigation of magnetism in κ−(ET)2X : Antiferromagnetism (2023)
Journal Article
Huddart, B., Lancaster, T., Blundell, S., Guguchia, Z., Taniguchi, H., Clark, S., & Pratt, F. (2023). μSR investigation of magnetism in κ−(ET)2X : Antiferromagnetism. Physical Review Research, 5(1), Article 013015. https://doi.org/10.1103/physrevresearch.5.013015

We study magnetism in the κ-(ET)2X family of charge-transfer salts using implanted muon spectroscopy in conjunction with detailed ab initio electronic structure calculations using density functional theory (DFT). ET stands for the electron donor mole... Read More about μSR investigation of magnetism in κ−(ET)2X : Antiferromagnetism.

MuFinder: A program to determine and analyse muon stopping sites (2022)
Journal Article
Huddart, B., Hernández-Melián, A., Hicken, T., Gomilšek, M., Hawkhead, Z., Clark, S., Pratt, F., & Lancaster, T. (2022). MuFinder: A program to determine and analyse muon stopping sites. Computer Physics Communications, 280, https://doi.org/10.1016/j.cpc.2022.108488

Significant progress has recently been made in calculating muon stopping sites using density functional theory. The technique aims to address two of the most common criticisms of the muon-spin spectroscopy (μ+SR) technique, namely, where in the sampl... Read More about MuFinder: A program to determine and analyse muon stopping sites.

Radio-Frequency Manipulation of State Populations in an Entangled Fluorine-Muon-Fluorine System (2022)
Journal Article
Billington, D., Riordan, E., Salman, M., Margineda, D., Gill, G. J., Cottrell, S. P., McKenzie, I., Lancaster, T., Graf, M. J., & Giblin, S. R. (2022). Radio-Frequency Manipulation of State Populations in an Entangled Fluorine-Muon-Fluorine System. Physical Review Letters, 129(7), https://doi.org/10.1103/physrevlett.129.077201

Entangled spin states are created by implanting muons into single-crystal LiY0.95Ho0.05F4 to form a cluster of correlated, dipole-coupled local magnetic moments. The resulting states have well-defined energy levels allowing experimental manipulation... Read More about Radio-Frequency Manipulation of State Populations in an Entangled Fluorine-Muon-Fluorine System.

Muon-Nitrogen Quadrupolar Level Crossing Resonance in a Charge Transfer Salt (2022)
Journal Article
Berlie, A., Pratt, F. L., Huddart, B. M., Lancaster, T., & Cottrell, S. P. (2022). Muon-Nitrogen Quadrupolar Level Crossing Resonance in a Charge Transfer Salt. Journal of Physical Chemistry C, 126(17), 7529-7534. https://doi.org/10.1021/acs.jpcc.2c00617

Although muons are primarily regarded as a local spin probe, they can also access the charge state of an atom or molecule via quadrupolar level crossing resonance (QLCR) spectroscopy. We use Li+TCNQ– (TCNQ = 7,7,8,8-tetracyanoquinodimethane), a simpl... Read More about Muon-Nitrogen Quadrupolar Level Crossing Resonance in a Charge Transfer Salt.

Magnetism in the Néel-skyrmion host GaV4S8 under pressure (2022)
Journal Article
Hicken, T., Wilson, M., Holt, S., Khassanov, R., Lees, M., Gupta, R., Das, D., Balakrishnan, G., & Lancaster, T. (2022). Magnetism in the Néel-skyrmion host GaV4S8 under pressure. Physical Review B, 105(13), https://doi.org/10.1103/physrevb.105.134414

We present magnetization and muon-spin spectroscopy measurements of Néel-skyrmion host GaV4S8 under the application of hydrostatic pressures up to P = 2.29 GPa. Our results suggest that the magnetic phase diagram is altered with pressure via a reduct... Read More about Magnetism in the Néel-skyrmion host GaV4S8 under pressure.