A5003964241- Cold Atom Physics and Bose-Einstein Condensates
- Organic and Molecular Conductors Research
- 2D Materials and Applications
- Molecular Junctions and Nanostructures
- Atomic and Subatomic Physics Research
- Advanced Frequency and Time Standards
- Mechanical and Optical Resonators
- Iron-based superconductors research
- Quantum, superfluid, helium dynamics
- Graphene research and applications
- Quantum Information and Cryptography
- Quantum and electron transport phenomena
- Hydrogen Storage and Materials
- Quantum optics and atomic interactions
- Physics of Superconductivity and Magnetism
- Force Microscopy Techniques and Applications
- Surface and Thin Film Phenomena
- Advanced Chemical Physics Studies
- Solid-state spectroscopy and crystallography
- Inorganic Chemistry and Materials
- Quasicrystal Structures and Properties
- Boron and Carbon Nanomaterials Research
- Spectroscopy and Laser Applications
- Surface Chemistry and Catalysis
- Strong Light-Matter Interactions
Jožef Stefan Institute
2015-2025
University of Ljubljana
2023-2025
Universität Innsbruck
2012
University of Western Macedonia
2010
Jožef Stefan International Postgraduate School
2010
National Centre of Scientific Research "Demokritos"
2010
We report on the experimental realization of a robust and efficient magneto-optical trap for erbium atoms, based narrow cooling transition at 583nm. observe up to $N=2 \times 10^{8}$ atoms temperature about $T=15 \mu K$. This simple scheme provides better starting conditions direct loading dipole traps as compared approaches strong alone, or combination kHz transition. Our results Er point general, approach laser cool samples other lanthanide (Ho, Dy, Tm) production quantum-degenerate samples.
We review the features of charge density wave (CDW) conductor $\mathrm{Nb}{\mathrm{S}}_{3}$ (phase II) and include several additional results from transport, compositional, structural studies. Particularly, we highlight three central results: (1) In addition to previously reported CDW transitions at ${T}_{\mathrm{P}1}=360\phantom{\rule{0.16em}{0ex}}\mathrm{K}$ ${T}_{\mathrm{P}2}=150\phantom{\rule{0.16em}{0ex}}\mathrm{K}$, a third transition occurs much higher temperature...
A study of bright matter-wave solitons a cesium Bose-Einstein condensate (BEC) is presented. Production single soliton demonstrated and dependence atom number on the interatomic interaction investigated. Formation trains in quasi one-dimensional confinement shown. Additionally, fragmentation BEC has been observed outside confinement, free space. In end double production setup for studying collisions described.
The basic and the charge density wave (CDW) structures of monoclinic ${\mathrm{NbS}}_{3}$-II polymorph were studied by synchrotron x-ray diffraction, ab initio calculations, simulation electron diffraction patterns, atomic-resolution transmission low-temperature scanning tunneling microscopies. It is confirmed that structure belongs to space group $P{2}_{1}/m$ described with a unit cell, formed four pairs symmetry-related trigonal prismatic (TP) columns...
The article offers a comparison of the sensitivities for vapour trace detection Trinitrotoluene (TNT) explosives two different sensor systems: chemo-mechanical based on chemically modified Atomic Force Microscope (AFM) cantilevers Micro Electro Mechanical System (MEMS) technology with optical (CMO), and miniature system capacitive functionalized planar capacitors interdigitated electrodes comb-like structure electronic (CE). In both cases (either CMO or CE), surfaces are layer APhS...
Abstract Mesoscopic irregularly ordered and even amorphous self-assembled electronic structures were recently reported in two-dimensional metallic dichalcogenides (TMDs), created manipulated with short light pulses or by charge injection. Apart from promising new all-electronic memory devices, such states are of great fundamental importance, since aperiodic cannot be described terms conventional charge-density-wave (CDW) physics. In this paper, we address the problem metastable mesoscopic...
A series of hydrogenated cubic C15 and hexagonal C14 ZrCr2 Laves phases were studied by means semiempirical extended Hückel tight-binding, ab initio density functional theory methods maximally localized Wannier functions, with a goal to find the most energetically favorable positions interstitial H atoms in host unit cells. We consider situations one or two per primitive cell. Crystal-orbital overlap population studies, performed for structure, show repulsion between hydrogen close...
Good chemical selectivity of sensors for detecting vapour traces targeted molecules is vital to reliable detection systems explosives and other harmful materials. We present the design, construction measurements electronic response a 16 channel nose based on differential microcapacitors, which were surface-functionalized by different silanes. The e-nose detects less than 1 molecule TNT out 10
In this paper, we present a miniature detection system, which is able to detect and selectively recognize different vapor traces of explosives. It based on surface-functionalized array COMB capacitive sensors extremely low noise integrated electronics. The measurement system sensitive selective, consumes minimum amount energy, very small cheap produce in large quantities, insensitive environmental influences. Owing electronics selective modification capacitor surfaces, it possible less than...
We used a 16-channel e-nose demonstrator based on micro-capacitive sensors with functionalized surfaces to measure the response of 30 different vapours from 11 substances, including explosives 1,3,5-trinitro-1,3,5-triazinane (RDX), 1-methyl-2,4-dinitrobenzene (DNT) and 2-methyl-1,3,5-trinitrobenzene (TNT). A classification model was developed using Random Forest machine-learning algorithm trained models set signals, where concentration flow selected single vapour were varied independently....
We demonstrate the emission of correlated atom jets from a matter-wave soliton in quasi-one-dimensional optical trap. characterize dependence jet properties on frequency, amplitude, and length modulation, qualitatively reproduce trends mean-field picture with one-dimensional time-dependent Gross-Pitaevskii equation simulation. High-order are observed for sufficiently long pulses. A double-pulse modulation sequence produces consecutive jets, multipulse may lead to irregular three-dimensional...
The aim of this study is to evaluate the method for compensation magnetic field interference from mains, which consists primarily components with a frequency 50 (60) Hz and its multiples. setup compensates interfering using three Helmholtz coils, sensors, digital processing unit, power amplifiers. unit implements an adaptive least-mean-square (LMS) algorithm calculate currents through coils that are necessary compensation. prototype fully at 50, 150, 250, 350 down noise level sensor...
Paradigmatic quantum spin liquid has been in the past closely linked to high-temperature superconductivity. Here we focus on a layered 1T-${\mathrm{TaS}}_{2}$, which recently emerged as surprising candidate for triangular lattice. Upon doping 1T-${\mathrm{TaS}}_{2}$ with Se, $^{77}\mathrm{Se}$ nuclear magnetic resonance and $^{181}\mathrm{Ta}$ quadrupole data show remarkable robustness of at low Se levels despite growth inhomogeneities electronic state. A dramatic change low-energy...
The ability to fabricate crystalline monolayers of confined superconducting or magnetic condensate on surfaces is a key issue realize new functionalities and understand the nature competing orders in their phase diagram at nanoscale. Herein, we outline reliable method pattern monolayer islands Kagome lattice (BETS)2GaCl4 (where BETS = bis(ethylenedithio) tetraselenafulvalene) Ag(111). At deposition temperature 125 K, dimers form with pore size 1.2 nm, making it possible encapsulate small...
We deposit azafullerene C59N• radicals in a vacuum on the Au(111) surface for layer thicknesses between 0.35 and 2.1 monolayers (ML). The layers are characterized using X-ray photoemission (XPS) absorption fine structure (NEXAFS) spectroscopy, low-temperature scanning tunneling microscopy (STM), by density functional calculations (DFT). singly unoccupied C59N orbital (SUMO) has been identified N 1s NEXAFS/XPS spectra of as spectroscopic fingerprint molecular radical state. At low coverages...
We combine the Ramsey interferometry protocol, Stern-Gerlach detection scheme, and use of elongated geometry a cloud fully polarized cold cesium atoms to measure selected component magnetic-field gradient along atomic in single shot. In contrast standard method where precession two spatially separated clouds is simultaneously measured extract their phase difference, which proportional gradient, we here demonstrate gradiometer using image an expanding with difference imprinted cloud. Using...
It is shown that tiling in icosahedral quasicrystals can also be properly described by cyclic twinning at the unit cell level. The operation applied on primitive prolate golden rhombohedra, which considered a result of distorted face-centered cubic parent structure. shape rhombohedra determined an exact space filling, resembling forbidden five-fold rotational symmetry. Stacking clusters, formed around multiply twinned rhombic hexecontahedra, keeps adjacent clusters discrete relationships....
Ordering of the two incommensurate charge density waves (CDW), $\mathbf{q_1}$ = (0.0, 0.243, 0.0) and $\mathbf{q_2}$ (0.5, 0.263,0.5) in quasi-one-dimensional NbSe$_3$ structure is studied by means low temperature scanning tunneling microscopy. Larger (100) van der Waals surfaces are analyzed using one-dimensional Fourier transforms along three types trigonal prismatic columns, running parallel to monoclinic $\mathbf{b_0}$ direction. The procedure enables unambiguous differentiation between...