A5084231381- Advanced Condensed Matter Physics
- Inorganic Fluorides and Related Compounds
- Organic and Molecular Conductors Research
- Rare-earth and actinide compounds
- Magnetic and transport properties of perovskites and related materials
- Multiferroics and related materials
- Iron-based superconductors research
- Muon and positron interactions and applications
- Physics of Superconductivity and Magnetism
- Crystal Structures and Properties
- Graphene research and applications
- 2D Materials and Applications
Queen Mary University of London
2023
University of Illinois Urbana-Champaign
2012-2014
The hybrid perovskite copper(ii) guanidinium formate, C(NH2)3[Cu(HCO2)3], is a close analog of the inorganic material KCuF3, well-studied exemplar Heisenberg spin-12 antiferromagnetic chain. However, polymorphism known in based on different orbital ordering d9 Cu2+ ions, has never been observed C(NH2)3[Cu(HCO2)3]. We use density-functional theory calculation to construct hypothetical polymorph analogous structure KCuF3. This very similar geometric and magnetic structures phase but it no...
Pressure-dependent, low-temperature inelastic light (Raman) scattering measurements of KCuF(3) show that applied pressure above P* ~ 7 kbar suppresses a previously observed structural phase transition temperature to zero in KCuF(3), resulting the development fluctuational (quasielastic) response near T 0 K. This pressure-induced response--which we associate with slow fluctuations CuF(6) octahedral orientation--is independent and exhibits characteristic fluctuation rate is much larger than...
Superconductivity (SC) in so-called "unconventional superconductors" is nearly always found the vicinity of another ordered state, such as antiferromagnetism, charge density wave (CDW), or stripe order. This suggests a fundamental connection between SC and fluctuations some other order parameter. To better understand this connection, we used high-pressure x-ray scattering to directly study CDW layered dichalcogenide TiSe2, which was previously shown exhibit when suppressed by pressure [1]...