A5022162365- Topological Materials and Phenomena
- Graphene research and applications
- Advanced Condensed Matter Physics
- Quantum and electron transport phenomena
- Inorganic Chemistry and Materials
- Magnetic and transport properties of perovskites and related materials
- Iron-based superconductors research
- 2D Materials and Applications
- Quantum optics and atomic interactions
- Physics of Superconductivity and Magnetism
- Synthesis and characterization of novel inorganic/organometallic compounds
- Rare-earth and actinide compounds
- Multiferroics and related materials
- Quantum many-body systems
- Organic and Molecular Conductors Research
- Quantum Mechanics and Non-Hermitian Physics
- Molecular Junctions and Nanostructures
- Electronic and Structural Properties of Oxides
- Advanced Thermoelectric Materials and Devices
Princeton University
2015-2020
Breaking chiral symmetry in a solid Dirac semimetals have graphene-like electronic structure, albeit three rather than two dimensions. In magnetic field, their cones split into halves, one supporting left-handed and the other right-handed fermions. If an electric field is applied parallel to this “chiral” may break: phenomenon called anomaly. Xiong et al. observed anomaly semimetal Na 3 Bi (see Perspective by Burkov). Transport measurements lead detection of predicted large negative...
Abstract A long-standing issue in topological insulator research has been to find a bulk single crystal material that provides high-quality platform for characterizing surface states without interference from electronic states. This would ideally be insulator, have state Dirac point energy well isolated the valence and conduction bands, display quantum oscillations electrons growable as large, crystals. Here we show this obstacle is overcome by crystals of lightly Sn-doped Bi 1.1 Sb 0.9 Te 2...
A quantum Hall insulator is observed to execute large jumps between metastable Chern states.
Edge supercurrents in superconductors have long been an elusive target. Interest them has reappeared the context of topological superconductivity. We report evidence for existence a robust edge supercurrent Weyl superconductor molybdenum ditelluride (MoTe2). In magnetic field B, fluxoid quantization generates periodic modulation condensate observable as "fast-mode" oscillation critical current Ic versus B The fast-mode frequency is distinct from conventional Fraunhofer displayed by bulk...
In this talk, we describe recent experimental progress in detecting the chiral anomaly Dirac semimetal Na$_3$Bi presence of a magnetic field. The anomaly, which plays fundamental role gauge theories, was predicted to be observable crystals by Nielsen and Ninomiya 1983 [1]. Theoretical identifying investigating Weyl semimetals has revived strong interest issue [2-6]. semimetal, breaking time-reversal symmetry field $\bf B$ splits each node into two nodes. If an electric E$ is applied parallel...
In this letter, we report the gigantic thermal Hall effect $κ_{xy}$ in low-field correlated-paramagnetic state of frustrated pyrochlore Yb$_2$Ti$_2$O$_7$. We observed a record magnitude for angle an insulator, $\left|κ_{xy}\right|/κ_{xx}\sim 2\,\%$. The signal onsets at $T\sim 3\,$K and is severely weakened around transition to canted ferromagnetic order $T_\text{CFM}=0.275\,$K. Besides large $κ_{xy}>0$ fluctuating regime, sign change towards negative occurs lowest temperatures moderate...