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    Article

    Scale-invariant magnetic anisotropy in RuCl3 at high magnetic fields

    In RuCl3, inelastic neutron scattering and Raman spectroscopy reveal a continuum of non-spin-wave excitations that persists to high temperature, suggesting the presence of a spin liquid state on a honeycomb latti...

    K. A. Modic, Ross D. McDonald, J. P. C. Ruff, Maja D. Bachmann, You Lai in Nature Physics (2021)

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    Chapter and Conference Paper

    Event-Driven Ontology Population - from Research to Practice in Critical Infrastructure Systems

    In an interconnected world, the Systems-of-Systems (SoS) paradigm is prevalent in various domains, particularly in large-scale environments as being found in the area of critical infrastructures. Due to the chara...

    David Graf, Wieland Schwinger in Trends and Applications in Information Sys… (2021)

  3. Article

    Open Access

    Quantum-critical scale invariance in a transition metal alloy

    Quantum-mechanical fluctuations between competing phases induce exotic collective excitations that exhibit anomalous behavior in transport and thermodynamic properties, and are often intimately linked to the a...

    Yasuyuki Nakajima, Tristin Metz, Christopher Eckberg in Communications Physics (2020)

  4. Article

    Open Access

    Tuning magnetic confinement of spin-triplet superconductivity

    Electrical magnetoresistance and tunnel diode oscillator measurements were performed under external magnetic fields up to 41 T applied along the crystallographic b axis (hard axis) of UTe2 as a function of temper...

    Wen-Chen Lin, Daniel J. Campbell, Sheng Ran, I-Lin Liu in npj Quantum Materials (2020)

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    Article

    Dirac fermions and flat bands in the ideal kagome metal FeSn

    A kagome lattice of 3d transition metal ions is a versatile platform for correlated topological phases hosting symmetry-protected electronic excitations and magnetic ground states. However, the paradigmatic state...

    Mingu Kang, Linda Ye, Shiang Fang, Jhih-Shih You, Abe Levitan in Nature Materials (2020)

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    Chapter and Conference Paper

    Towards Message-Driven Ontology Population - Facing Challenges in Real-World IoT

    Large-scale Internet-of-Things (IoT) environments as being found in critical infrastructures such as Intelligent Transportation Systems (ITS) are characterized by (i) massive heterogeneity of data, (ii) prevalen...

    David Graf, Wieland Schwinger in Trends and Innovations in Information Syst… (2020)

  7. No Access

    Chapter

    Exploiting Twitter for Informativeness Classification in Disaster Situations

    Disaster management urgently requires mechanisms for achieving situation awareness (SA) in a timely manner, allowing authorities to react in an appropriate way to reduce the impact on affected people and infra...

    David Graf, Werner Retschitzegger in Transactions on Large-Scale Data- and Know… (2020)

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    Article

    Quenched nematic criticality and two superconducting domes in an iron-based superconductor

    The nematic electronic state and its associated critical fluctuations have emerged as a potential candidate for the superconducting pairing in various unconventional superconductors. However, in most materials...

    Pascal Reiss, David Graf, Amir A. Haghighirad, William Knafo, Loïc Drigo in Nature Physics (2020)

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    Article

    Extreme magnetic field-boosted superconductivity

    Applied magnetic fields underlie exotic quantum states, such as the fractional quantum Hall effect1 and Bose–Einstein condensation of spin excitations2. Superconductivity, however, is inherently antagonistic towa...

    Sheng Ran, I-Lin Liu, Yun Suk Eo, Daniel J. Campbell, Paul M. Neves in Nature Physics (2019)

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    Article

    Switching 2D magnetic states via pressure tuning of layer stacking

    The physical properties of two-dimensional van der Waals crystals can be sensitive to interlayer coupling. For two-dimensional magnets13, theory suggests that interlayer exchange coupling is strongly dependent o...

    Tiancheng Song, Zaiyao Fei, Matthew Yankowitz, Zhong Lin, Qianni Jiang in Nature Materials (2019)

  11. Article

    Open Access

    de Haas-van Alphen effect of correlated Dirac states in kagome metal Fe3Sn2

    Primarily considered a medium of geometric frustration, there has been a growing recognition of the kagome network as a harbor of lattice-borne topological electronic phases. In this study we report the observ...

    Linda Ye, Mun K. Chan, Ross D. McDonald, David Graf, Mingu Kang in Nature Communications (2019)

  12. Article

    Open Access

    Emergent bound states and impurity pairs in chemically doped Shastry-Sutherland system

    Impurities often play a defining role in the ground states of frustrated quantum magnets. Studies of their effects are crucial in understanding of the phase diagram in these materials. SrCu2(BO3)2, an experimenta...

    Zhenzhong Shi, William Steinhardt, David Graf, Philippe Corboz in Nature Communications (2019)

  13. No Access

    Article

    Mainstreaming Education for Sustainable Development at a Swiss University: Navigating the Traps of Institutionalization

    How far have higher education institutions progressed towards integrating sustainable development at an institutional level and are they responding to the societal need for transformation? Can the pace of tran...

    Lilian J. Trechsel, Anne B. Zimmermann, David Graf, Karl Herweg in Higher Education Policy (2018)

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    Article

    Dynamic band-structure tuning of graphene moiré superlattices with pressure

    Heterostructures can be assembled from atomically thin materials by combining a wide range of available van der Waals crystals, providing exciting possibilities for designer electronics1. In many cases, beyond si...

    Matthew Yankowitz, Jeil Jung, Evan Laksono, Nicolas Leconte, Bheema L. Chittari in Nature (2018)

  15. No Access

    Article

    A model for instructional design case materials

    A conceptual model for focused, fictional instructional design and development case materials is presented in this article. The author suggests that the scarcity of suitable case materials for use in instructi...

    David Graf in Educational Technology Research and Development (1991)

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