A5055462627- Physics of Superconductivity and Magnetism
- Electronic and Structural Properties of Oxides
- Magnetic and transport properties of perovskites and related materials
- Advanced Condensed Matter Physics
- Magnetic properties of thin films
- Atomic and Subatomic Physics Research
- Semiconductor materials and devices
- Iron-based superconductors research
- Multiferroics and related materials
- Quantum and electron transport phenomena
- Topological Materials and Phenomena
- Ferroelectric and Piezoelectric Materials
- Magneto-Optical Properties and Applications
- Force Microscopy Techniques and Applications
- Rare-earth and actinide compounds
- Characterization and Applications of Magnetic Nanoparticles
- Ferroelectric and Negative Capacitance Devices
- Geomagnetism and Paleomagnetism Studies
- Seismic Waves and Analysis
- Superconducting Materials and Applications
- Fluid Dynamics and Turbulent Flows
- Magnetic confinement fusion research
- Magnetic Field Sensors Techniques
- Mechanical and Optical Resonators
- Advanced X-ray and CT Imaging
Bar-Ilan University
2016-2025
Institute of Nanotechnology
2017
Institute of Magnetism
2015
Stanford University
2009-2013
SLAC National Accelerator Laboratory
2010-2012
Columbia University
2011
Weizmann Institute of Science
2006-2007
The interface between the insulating oxides LaAlO${}_{3}$ and SrTiO${}_{3}$ exhibits a superconducting two-dimensional electron system that can be modulated by gate voltage. While conductivity has been probed extensively gating of critical temperature demonstrated, question as to whether, if so how, tunes superfluid density order parameter needs answered. We present local magnetic susceptibility, related density, function temperature, voltage, location. show dependence at different voltages...
Abstract Considering the growing interest in magnetic materials for unconventional computing, data storage, and sensor applications, there is active research not only on material synthesis but also characterisation of their properties. In addition to structural integral characterisations, imaging magnetisation patterns, current distributions fields at nano- microscale major importance understand responses qualify them specific applications. this roadmap, we aim cover a broad portfolio...
Quantum materials have a fascinating tendency to manifest novel and unexpected electronic states upon proper manipulation. Ideally, such manipulation should induce strong irreversible changes lead new relevant length scales. Plastic deformation introduces large numbers of dislocations into material, which can organize extended structures give rise qualitatively physics as result the huge localized strains. However, this approach is largely unexplored in context quantum materials, are...
We use scanning superconducting quantum interference device (SQUID) microscopy to investigate the behavior of vortices in presence twin boundaries pnictide superconductor Ba(Fe${}_{1\ensuremath{-}x}$Co${}_{x}$)${}_{2}$As${}_{2}$. show that avoid pinning on boundaries. Individual move a preferential way when manipulated with SQUID: They tend not cross boundary, but rather parallel it. This can be explained by observation enhanced superfluid density The observed repulsion from may mechanism...
Manipulating individual vortices in a deterministic way is challenging, ideally, manipulation should be effective, local, and tunable strength location. Here, we show that interact with strain fields generated by mechanical stress. We utilized this interaction to move thin superconducting films via local contact, without magnetic field or current. used scanning quantum interference device (SQUID) image apply vertical stress the tip of our sensor. Vortices were attracted contact point,...
We use magnetic force microscopy (MFM) and scanning SQUID susceptometry to measure the local superfluid density $\rho_{s}$ in Ba(Fe$_{0.95}$Co$_{0.05}$)$_2$As$_2$ single crystals from 0.4 K critical temperature $T_c=18.5$ K. observe that penetration depth $\lambda$ varies about ten times more slowly with than previously published, a dependence can be well described by clean two-band fully gapped model. demonstrate MFM important hard-to-determine absolute value of $\lambda$, as obtain its...
Superconducting quantum interference device microscopy shows stripes of increased diamagnetic susceptibility in the superconducting state twinned, orthorhombic, underdoped crystals $\text{Ba}{({\text{Fe}}_{1\ensuremath{-}x}{\text{Co}}_{x})}_{2}{\text{As}}_{2}$, but not tetragonal overdoped crystals. These are consistent with enhanced superfluid density on twin boundaries.
Electronic correlations give rise to fascinating macroscopic phenomena such as superconductivity, magnetism, and topological phases of matter. Although these manifest themselves macroscopically, fully understanding the underlying microscopic mechanisms often requires probing on multiple length scales. Spatial modulations mesoscopic scale are especially challenging probe, owing limited range suitable experimental techniques. Here, we review recent progress in scanning superconducting quantum...
Scanning SQUID susceptometry images the local magnetization and susceptibility of a sample. By accurately modeling signal we can determine physical properties such as penetration depth permeability superconducting samples. We calculate scanning for slab arbitrary thickness with isotropic London depth, on non-superconducting substrate, where both substrate have paramagnetic response that is linear in applied field. derive analytical approximations to our general expression number limits....
Oxide interfaces, including the LaAlO3/SrTiO3 interface, have been a subject of intense interest for over decade due to their rich physics and potential as low-dimensional nanoelectronic systems. The field has reached stage where efforts are invested in developing devices. It is critical now understand functionalities limitations such Recent scanning probe measurements interface revealed locally enhanced current flow accumulation charge along channels related SrTiO3 structural domains. These...
SrTiO${}_{3}$-based interfaces with high electron mobility continue to attract interest, due the possibility of combining quantum phenomena many functionalities exhibited by SrTiO${}_{3}$. The origin mobility, however, remains poorly understood. authors investigate scattering mechanisms limiting (over 10${}^{5}$ cm${}^{2}$/Vs) in \ensuremath{\gamma}-Al${}_{2}$O${}_{3}$/SrTiO${}_{3}$ heterostructures. Broken symmetry at spinel/perovskite interface seems play a key role, terms accumulation...
Materials with strongly correlated electrons exhibit physical properties that are often difficult to predict as they result from the interactions of large numbers combined several quantum de-grees freedom. The layered oxide perovskite Sr2RuO4 is a electron material has been intensively investigated since its discovery due unusual properties. Whilst re-cent experiments have reopened debate on exact symmetry superconducting state in Sr2RuO4, deeper understanding normal appears crucial this...
Magnetic field-induced changes in the electrical resistance of materials reveal insights into fundamental properties governing their electronic and magnetic behavior. Various classes magnetoresistance have been realized, including giant, colossal, extraordinary magnetoresistance, each with distinct physical origins. In recent years, extreme (XMR) has observed topological non-topological displaying a non-saturating reaching 10
Identifying orbital textures and their effects on the electronic properties of quantum materials is a critical element in developing orbitronic devices. However, are often entangled with spin degree freedom, making it difficult to uniquely identify them charge transport phenomena. Here, we present combination scanning superconducting interference device (SQUID) current imaging, global measurements, theoretical analysis, that reveals direct contribution linear 2D systems. Specifically, show...
We demonstrate a topotactic transformation of zincblende InAs(Sb) nanowires into the Zintl phase Eu5In2As6 through vapor–solid mutual exchange process involving Eu and In in molecular beam epitaxy. This conversion preserves polyhedral coordination lattice parent structure while inducing orthorhombic symmetry product phase, Eu5In2As6, which quasi-one-dimensional [InAs3]6– chains with tetrahedral sites align along ⟨110⟩ direction structure. Local global magnetic characterization identified two...
Manipulation of magnetism is a longstanding goal research in exotic materials. In this work, we demonstrate that the small ferromagnetic patches LaAlO(3)/SrTiO(3) heterostructures can be dramatically changed by situ contact scanning probe. Our results provide platform for manipulation magnets through either strong magneto-elastic coupling or sensitivity to surface modification. The ability locally control particularly interesting due presence superconductivity with spin-orbit LaAlO(3)/SrTiO(3).