A5064939700- Physics of Superconductivity and Magnetism
- Rare-earth and actinide compounds
- Advanced Condensed Matter Physics
- Topological Materials and Phenomena
- Iron-based superconductors research
- Superconducting Materials and Applications
- Quantum and electron transport phenomena
- Magnetic properties of thin films
- Model Reduction and Neural Networks
- Atomic and Subatomic Physics Research
- Neural Networks and Applications
- Magnetic Properties and Applications
- Superconductivity in MgB2 and Alloys
- Machine Learning and Data Classification
- High-pressure geophysics and materials
- Quantum Chromodynamics and Particle Interactions
- Inorganic Fluorides and Related Compounds
- Magnetic and transport properties of perovskites and related materials
- Advanced NMR Techniques and Applications
- Magnetic Properties of Alloys
University of Cambridge
2015-2022
Insulators occur in more than one guise, a recent finding was class of topological insulators, which host conducting surface juxtaposed with an insulating bulk. Here we report the observation unusual state electrically bulk that simultaneously yields quantum oscillations characteristics unconventional Fermi liquid. We present oscillation measurements magnetic torque high purity single crystals Kondo insulator SmB6, reveal frequencies characteristic large three-dimensional conduction electron...
We report magnetic quantum oscillations measured using torque magnetisation in the Kondo insulator YbB12 and discuss potential origin of underlying Fermi surface. Observed as well complementary quantities such a finite linear specific heat capacity exhibit similarities with SmB6, yet also crucial differences. Small heavy sections are observed to neighbouring fermion semimetallic surface, contrast large light surface SmB6 which more similar conduction electron A rich spectrum theoretical...
The nature of the Fermi surface observed in recently discovered family unconventional insulators starting with SmB$_6$ and subsequently YbB$_{12}$ is a subject intense inquiry. Here we shed light on this question by comparing quantum oscillations between high magnetic field-induced metallic regime insulating regime. In beyond 47 T, find prominent contactless resistivity characterised multiple frequencies up to at least 3000 T heavy effective masses 17 $m_\text{e}$, characteristic an...
The finding of bulk quantum oscillations in the Kondo insulator SmB6 proved a considerable surprise. Subsequent measurements other correlated insulators including YbB12 lent support to our discovery class unconventional that host oscillations. Here we perform series experiments examine evidence for intrinsic character floating zone-grown single crystals have been subject oscillation studies. We present results thermodynamic, transport, and composition analysis on pristine compare with...
Significance Modest magnetic fields above <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mo>≈</mml:mo> </mml:math> 22 T in the underdoped cuprates were argued to destroy superconductivity and reveal a conventional metallic pseudogap ground state that hosts quantum oscillations. We perform high-magnetic field electrical resistivity torque measurements using low temperatures small applied measurement currents instead an unconventional vortex matter persists...
Good weight initialisation is an important step in successful training of Artificial Neural Networks. Over time a number improvements have been proposed to this process. In paper we introduce novel technique called the Straddled Matrix Initialiser. This motivated by our assumption that major, global-scale relationships data are linear with only smaller effects requiring complex non-linearities. Combination and ReLU activation function initialises Network as de facto model, which postulate...