A5082274128- Topological Materials and Phenomena
- Advanced Condensed Matter Physics
- Graphene research and applications
- Physics of Superconductivity and Magnetism
- Quantum and electron transport phenomena
- 2D Materials and Applications
- Quantum many-body systems
- Magnetic properties of thin films
- Cold Atom Physics and Bose-Einstein Condensates
- Quantum, superfluid, helium dynamics
- Atomic and Subatomic Physics Research
- Iron-based superconductors research
- Rare-earth and actinide compounds
- Electronic and Structural Properties of Oxides
- Superconductivity in MgB2 and Alloys
- Diamond and Carbon-based Materials Research
- Liquid Crystal Research Advancements
- Photorefractive and Nonlinear Optics
- Nonlinear Waves and Solitons
- Molecular spectroscopy and chirality
- Nonlinear Photonic Systems
- Advanced Physical and Chemical Molecular Interactions
- Advanced Algebra and Geometry
- Quantum Mechanics and Non-Hermitian Physics
- Crystallography and Radiation Phenomena
Princeton University
2019-2025
Jožef Stefan Institute
2019
Magnetic Weyl semimetals (WSMs)—materials that host exotic quasiparticles called fermions—must break either spatial inversion or time-reversal symmetry. A number of WSMs symmetry have been identified, but showing unambiguously a material is time-reversal-breaking WSM tricky. Three groups now provide spectroscopic evidence for this latter state in magnetic materials (see the Perspective by da Silva Neto). Belopolski et al. probed Co 2 MnGa using angle-resolved photoemission spectroscopy,...
Superconductors with kagome lattices have been identified for over 40 years, a superconducting transition temperature ${T}_{c}$ up to 7 K. Recently, certain superconductors found exhibit an exotic charge order, which intertwines superconductivity and persists being one order of magnitude higher than ${T}_{c}$. In this work, we use scanning tunneling microscopy study the in superconductor $\mathrm{Rb}{\mathrm{V}}_{3}{\mathrm{Sb}}_{5}$. We observe both $2\ifmmode\times\else\texttimes\fi{}2$...
Novel states of matter arise in quantum materials due to strong interactions among electrons. A nematic phase breaks the point group symmetry crystal lattice and is known emerge correlated materials. Here we report observation an intra-unit-cell order signatures Pomeranchuk instability Kagome metal ScV6Sn6. Using scanning tunneling microscopy spectroscopy, reveal a stripe-like breaking rotational within itself. Moreover, identify set van Hove singularities adhering layer electrons, which...
Superconducting materials exhibiting topological properties are emerging as an exciting platform to realize fundamentally new excitations from quantum states of matter. In this letter, we explore the possibility a field-free for generating Majorana zero energy by depositing magnetic Fe impurities on surface candidate superconductors, LiFeAs and $\mathrm{PbTaS}{\mathrm{e}}_{2}$. We use scanning tunneling microscopy probe localized induced at adatoms atomic scale sub-Kelvin temperatures. find...
Transition metal dichalcogenides are a family of quasi-two-dimensional materials that display high technological potential due to their wide range electronic ground states, e.g., from superconducting semiconducting, depending on the chemical composition, crystal structure, or electrostatic doping. Here, we unveil by tuning single parameter, hydrostatic pressure P, cascade phase transitions can be induced in few-layer transition dichalcogenide 1T'-WS2, including superconducting, topological,...
On the kagome lattice, electrons benefit from simultaneous presence of band topology, flat electronic bands, and van Hove singularities, forming competing or cooperating orders. Understanding interrelation between these distinct order parameters remains a significant challenge, leaving much associated physics unexplored. In superconductor KV3Sb5, which exhibits charge density wave (CDW) state below T = 78 K, we uncover an unpredicted field-induced phase transition 6 K. The observed is marked...
Chirality or handedness manifests in all fields of science, ranging from cell biology, molecular interaction, and catalysis to different branches physics. In condensed matter physics, chirality is intrinsic enigmatic quantum phases, such as chiral charge density waves superconductivity. Here, the underlying response subtle leads broken symmetries ground state. Detection key understand these states but they are extremely challenging expose leading debate controversy. using second-order...
The interplay between electronic topology and superconductivity is the subject of great current interest in condensed matter physics. For example, induced on surface topological insulators predicted to be triplet nature, while correlations may lead unconventional as twisted bilayer graphene. Here, we unveil an two-dimensional superconducting state recently discovered Dirac nodal line semimetal ZrAs2 which exclusively confined top bottom surfaces within crystal's ab plane. As a remarkable...
Transition metal dichalcogenides display a high technological potential due to their wide range of electronic ground states. Here, we unveil that by tuning hydrostatic pressure P, cascade phase transitions can be induced in the few-layer transition dichalcogenide 1T'-WS2. As P increases, observe suppression superconductivity with concomitant emergence an anomalous Hall effect (AHE) at $$P\approx 1.15$$ GPa. Above 1.6GPa, uncover reentrant superconducting state emerging from still exhibiting...
Chirality, or handedness, is ubiquitous in science, from cell biology to physics, and condensed matter can underlie exotic phases such as chiral charge density waves superconductivity. However, detecting subtle broken symmetries that define states challenging, leading debate controversy. Here, using second-order optical response, we reveal the of a wave Kagome lattice KV3Sb5. Polarization-dependent mid-infrared photocurrent microscopy uncovers longitudinal, helicity-dependent associated with...
Three types of fermions have been extensively studied in topological quantum materials: Dirac, Weyl, and Majorana fermions. Beyond the fundamental high energy physics, exotic are allowed condensed matter systems residing three-, six- or eightfold degenerate band crossings. Here, we use angle-resolved photoemission spectroscopy to directly visualize three-doubly-degenerate bands PdSb$_2$. The ultrahigh resolution able achieve allows for confirmation all sixfold at R point, remarkable...
Quantum states induced by single-atomic impurities are at the frontier of physics and material science. While such have been reported in high-temperature superconductors dilute magnetic semiconductors, they unexplored topological magnets which can feature spin-orbit tunability. Here we use spin-polarized scanning tunneling microscopy/spectroscopy (STM/S) to study engineered quantum impurity a magnet Co