A5022044764- Electronic and Structural Properties of Oxides
- Magnetic and transport properties of perovskites and related materials
- Semiconductor materials and devices
- Ferroelectric and Negative Capacitance Devices
- Magnetic Field Sensors Techniques
- ZnO doping and properties
- Ferroelectric and Piezoelectric Materials
- Graphene research and applications
- Photochemistry and Electron Transfer Studies
- Multiferroics and related materials
- Magnetic properties of thin films
- Gas Sensing Nanomaterials and Sensors
- Ionic liquids properties and applications
- Surfactants and Colloidal Systems
- 2D Materials and Applications
Technical University of Denmark
2021-2024
University of Copenhagen
2018-2021
Oxide heterostructures represent a unique playground for triggering the emergence of novel electronic states and implementing new device concepts. The discovery 2D conductivity at $LaAlO_3/SrTiO_3$ interface has been linking over decade two major current research fields in Materials Science: correlated transition-metal-oxide systems low-dimensional systems. A full merging these requires nevertheless realization form freestanding membranes. Here we show completely method obtaining oxide...
Freestanding oxide membranes constitute an intriguing material platform for new functionalities and allow integration of electronics with technologically important platforms such as silicon. Sambri et al. recently reported a method to fabricate freestanding LaAlO3/SrTiO3 (LAO/STO) by spalling strained heterostructures. Here, we first develop scheme the high-yield fabrication membrane devices on Second, show that exhibit metallic conductivity superconducting phase below ∼200 mK. Using...
The ability to form freestanding oxide membranes of nanoscale thickness is great interest for enabling material functionality and integrating oxides in flexible electronic photonic technologies. Recently, a route has been demonstrated forming conducting heterostructure LaAlO3 SrTiO3, the canonical system electronics. In this route, epitaxial growth on SrTiO3 resulted strained state that relaxed by producing with random sizes locations. Here, we extend method enable self-formed LaAlO3/SrTiO3...
A simple approach is presented for designing complex oxide mesoscopic electronic devices based on the conducting interfaces of room temperature grown LaAlO3/SrTiO3 heterostructures. The technique entirely methods known from conventional semiconductor processing technology, and we demonstrate a lateral resolution ∼100 nm. We study low transport properties nanoscale wires feasibility defining in-plane gates allowing local control electrostatic environment in devices.
Magnetometers with a high sensitivity at weak magnetic fields are desirable for wide range of sensing applications. Devices that operate on the principle extraordinary magnetoresistance (EMR) appealing candidates because their simplicity and ability to room temperature but they suffer from low when compared state-of-the-art magnetometers such as superconducting quantum interference devices. Since EMR phenomenon is principally geometric effect, shapes various parts device represent additional...
Abstract Extraordinary magnetoresistance (EMR) is a geometric emerging in hybrid systems typically comprising high-mobility material and metal. Due to field-dependent redistribution of electrical currents these devices, the resistance at room temperature can increase by 10 7 % when applying magnetic field 5 T. Although EMR holds considerable potential for realizing sensitive, all-electronic magnetometers, this largely unmet. A key challenge that performance devices depends very sensitively...
Detecting weak magnetic fields is paramount in areas such as scanning magnetometers and manipulation of nanoparticles, thus rendering it crucial to increase the weak-field sensitivity for developing next-generation sensors. The current approaches high-sensitivity sensors, superconducting quantum interference devices, are complex expensive. By contrast, magnetoresistive sensors particularly extraordinary offer a simple operation at room temperature but, date, inferior sensitivity. To overcome...
The two-dimensional electron system found between LaAlO3 and SrTiO3 hosts a variety of physical phenomena that can be tuned through external stimuli. This allows for electronic devices controlling magnetism, spin–orbit coupling, superconductivity. Controlling the density by varying donor concentrations using electrostatic gating are convenient handles to modify properties, but impact on microscopic scale, particularly former, remains underexplored. Here, we image current distribution at 4.2...
Three series of ionic self-assembled materials based on anionic azo-dyes and cationic benzalkonium surfactants were synthesized thin films prepared by spin-casting. These appear isotropic when investigated with polarized optical microscopy, although they are highly anisotropic. Here, three homologous studied to rationalize this observation. Investigating ordered molecular relies a large extent advanced experimental methods research infrastructure. A statement that in particular is true for...
The two-dimensional electron system found between LaAlO3 and SrTiO3 hosts a variety of physical phenomena that can be tuned through external stimuli. This allows for electronic devices controlling magnetism, spin-orbit coupling, superconductivity. Controlling the density by varying donor concentrations using electrostatic gating are convenient handles to modify properties, but impact on microscopic scale, particularly former, remains underexplored. Here, we image current distribution at 4.2...