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2. Bismuthene on a SiC Substrate: A Candidate for a New High-Temperature Quantum Spin Hall Paradigm

Author

Reis, F., Li, G., Dudy, L., Bauernfeind, M., Glass, S., Hanke, W., Thomale, R., Schäfer, J., and Claessen, R.

Subjects
Condensed Matter - Strongly Correlated Electrons, Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Materials Science, Condensed Matter - Superconductivity, Quantum Physics
Abstract

Quantum spin Hall (QSH) materials promise revolutionary device applications based on dissipationless propagation of spin currents. They are two-dimensional (2D) representatives of the family of topological insulators, which exhibit conduction channels at their edges inherently protected against scattering. Initially predicted for graphene, and eventually realized in HgTe quantum wells, in the QSH systems realized so far, the decisive bottleneck preventing applications is the small bulk energy gap of less than 30 meV, requiring cryogenic operation temperatures in order to suppress detrimental bulk contributions to the edge conductance. Room-temperature functionalities, however, require much larger gaps. Here we show how this can be achieved by making use of a new QSH paradigm based on substrate-supported atomic monolayers of a high-Z element. Experimentally, the material is synthesized as honeycomb lattice of bismuth atoms, forming "bismuthene", on top of the wide-gap substrate SiC(0001). Consistent with the theoretical expectations, the spectroscopic signatures in experiment display a huge gap of ~0.8 eV in bismuthene, as well as conductive edge states. The analysis of the layer-substrate orbitals arrives at a QSH phase, whose topological gap - as a hallmark mechanism - is driven directly by the atomic spin-orbit coupling (SOC). Our results demonstrate how strained artificial lattices of heavy atoms, in contact with an insulating substrate, can be utilized to evoke a novel topological wide-gap scenario, where the chemical potential is located well within the global system gap, ensuring pure edge state conductance. We anticipate future experiments on topological signatures, such as transport measurements that probe the QSH effect via quantized universal conductance, notably at room temperature., Comment: 4 figures

Published
2016
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16. Sustainable interprofessional learning on clinical placements: the value of observing others at work.

Author

Kent F., Glass S., Courtney J., Thorpe J., Nisbet G., Kent F., Glass S., Courtney J., Thorpe J., and Nisbet G.

Abstract

Clinical placements have the potential to offer meaningful interprofessional learning opportunities for pre-registration students. Informal, as opposed to structured interprofessional learning opportunities, may offer a sustainable solution to the challenges of scheduling formal interprofessional programs in the workplace. To investigate this concept, students on clinical placement from a range of professions were invited to observe another profession undertake a patient consultation, after which they completed a standardized reflective tool. A grounded theory research design was used to explore the educational value of the one-off interprofessional observations, through an analysis of student written reflections (n = 79) and staff perceptions collected by interview (n = 11). The qualitative data was iteratively analyzed throughout the study period. A range of learning outcomes were described post student observations, ranging from knowledge or skills that informed profession-specific practice, to how others' roles related to patient needs, and the need for collaboration in order to provide high quality care. Staff orientation and facilitated reflection contributed to student learning. Positive learning value, though varying in depth, was identified through single interprofessional observations. Informal activities offer a sustainable interprofessional learning strategy that can be embedded into clinical placements; additional informal learning activities now warrant investigation.

Published
2022

41. Porous Materials

Author

Beyea, S. D., primary, Kuethe, D. O., additional, McDowell, A., additional, Caprihan, A., additional, and Glass, S. J., additional

Published
2006
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46. Implementation of influenza point-of-care-testing and patient-cohorting during a high-incidence season: a retrospective analysis of impact on infection prevention and control and clinical outcomes

Author

Youngs, J, Marshall, B, Farragher, M, Whitney, L, Glass, S, Pope, C, Planche, T, Riley, P, and Carrington, D

Subjects
virus diseases
Abstract

BACKGROUND: During high-incidence influenza seasons, a robust infection prevention and control policy is imperative to reduce nosocomial transmission of influenza. AIM: To assess the impact of Emergency Department (ED) influenza point-of-care-testing (POCT) and influenza-ward patient-cohorting on infection prevention and control and clinical outcomes. METHODS: Influenza POCT was operational in our adult ED from 21st January 2018 and an influenza-ward from 25th January 2018. A retrospective 'before-after' analysis was performed with pre-intervention defined as 1st November 2017-20th January 2018 and post-intervention 21st January-30th April 2018. Primary outcome was rate of hospital-acquired influenza (HAI). Secondary outcomes included antiviral prescription and length of stay. The length of time inpatients remain influenza RNA detected by polymerase chain reaction (PCR) was also analysed.

Published
2019

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