Sökning: "2D heterostructures"

Visar resultat 1 - 5 av 20 avhandlingar innehållade orden 2D heterostructures.

1. 1. Computational Studies of 2D Materials : Application to Energy Storage and Electron Transport in Nanoscale Devices

   Författare :Vivekanand Shukla; Rajeev Ahuja; Anton Grigoriev; Sudip Chakraborty; Kristian Sommer Thygesen; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Density functional theory; Non-equilibrium Green s function; 2D materials; Energy storage; Electron transport;

   Sammanfattning : The field of two-dimensional (2D) layered materials provides a new platform for studying diverse physical phenomena that are scientifically interesting and relevant for technological applications. Novel applications in electronics and energy storage harness the unique electronic, optical, and mechanical properties of 2D materials for design of crucial components. LÄS MER

3. 2. Heterogeneous Integration Technologies Based on Wafer Bonding and Wire Bonding for Micro and Nanosystems

   Författare :Xiaojing Wang; Göran Stemme; Frank Niklaus; Niclas Roxhed; Shuji Tanaka; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Micro-electromechanical systems MEMS ; heterogeneous integration; wafer bonding; vacuum packaging; hermetic packaging; wire bonding; magnetic assembly; 2D materials; 2D heterostructures; graphene; hexagonal boron nitride h-BN ; molybdenum disulfide MoS2 ; carbon nanotubes CNTs .; Electrical Engineering; Elektro- och systemteknik;

   Sammanfattning : Heterogeneous integration realizes assembly and packaging of separately manufactured micro-components and novel functional nanomaterials onto the same substrate. It has been a key technology for advancing the discrete micro- and nano-electromechanical systems (MEMS/NEMS) devices and micro-electronic components towards cost-effective and space-efficient multi-functional units. LÄS MER

4. 3. Influence of defects and impurities on the properties of 2D materials

   Författare :Soumyajyoti Haldar; Biplab Sanyal; Olle Eriksson; Torbjörn Björkman; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; 2D Materials; Defects on 2D materials; Impurities on 2D materials; Physics with spec. in Atomic; Molecular and Condensed Matter Physics; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik;

   Sammanfattning : Graphene, the thinnest material with a stable 2D structure, is a potential alternative for silicon-based electronics. However, zero band gap of graphene causes a poor on-off ratio of current thus making it unsuitable for logic operations. This problem prompted scientists to find other suitable 2D materials. LÄS MER

5. 4. Spin Transport in Two-Dimensional Material Heterostructures

   Författare :André Dankert; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Black phosphorous; Topological insulator; h-BN; Silicon; Transistor; Spintronic; MoS2; Graphene; 2D materials; Spin polarized tunnelling; Schottky barrier;

   Sammanfattning : Spintronics is considered as an alternative for information processing beyond the charge based technology. The spintronic device performance depend on the spin relaxation mechanisms in the channel material. Si and graphene are interesting for their long spin coherence lengths and ideal for spin transport channels. LÄS MER

7. 5. Critical Phenomena and Exchange Coupling in Magnetic Heterostructures

   Författare :Martina Ahlberg; Gabriella Andersson; Björgvin Hjörvarsson; Steve Bramwell; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; phase transitions; critical behavior; 2D XY model; MOKE; magnetic thin films and superlattices; amorphous multilayers; magnetic proximity effects; Physics with spec. in Atomic; Molecular and Condensed Matter Physics; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik;

   Sammanfattning : The continuous phase transition in thin magnetic films and superlattices has been studied using the magneto-optical Kerr effect (MOKE) and polarized neutron scattering (PNR).  It has been shown that the critical behavior of amorphous thin films belonging to the 2D XY universality class can be described within the same theory as crystalline sample. LÄS MER