Results 131 to 140 of about 1,987,784 (294)
Coherent and dissipative spin torques in quantum dots: A unified framework for quantum spin dynamics
Physical Review ResearchThe manipulation of single spins through spin-polarized tunneling opens pathways for quantum control at the atomic scale. We present a theoretical framework describing spin transfer, spin torques, and spin resonance in molecular quantum dots weakly ...
Dominic Ruckert +6 more
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Optimal tunneling enhances the quantum photovoltaic effect in double quantum dots
New Journal of Physics, 2014 We investigate the quantum photovoltaic effect in double quantum dots by applying the nonequilibrium quantum master equation. A drastic suppression of the photovoltaic current is observed near the open circuit voltage, which leads to a large filling ...
Chen Wang, Jie Ren, Jianshu Cao
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Enhancing Third- and Fifth-Order Nonlinearity via Tunneling in Multiple Quantum Dots
Nanomaterials, 2019 The nonlinearity of semiconductor quantum dots under the condition of low light levels has many important applications. In this study, linear absorption, self-Kerr nonlinearity, fifth-order nonlinearity and cross-Kerr nonlinearity of multiple quantum ...
Si-Cong Tian +9 more
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Multimodal Haptic Perception Through Synergistic Nanocomposite Sensor Arrays
Advanced Materials Technologies, EarlyView.Multi‐modal fingertip haptics are advanced through a bioinspired &vertical‐via' electronic skin architecture. A confined PDMS/MWCNT/NiNP nanocomposite, sitting at the percolation threshold, enables tactile, thermal, and magnetic sensing. A unique via‐density gradient and dedicated &Un‐Touch' reference nodes provide robust spatial resolution and signal ...
Amos Bardea, Fernando Patolsky
wiley +1 more source
Many-body Tunneling and Nonequilibrium Dynamics of Doublons in Strongly Correlated Quantum Dots
Scientific Reports, 2017 Quantum tunneling dominates coherent transport at low temperatures in many systems of great interest. In this work we report a many–body tunneling (MBT), by nonperturbatively solving the Anderson multi-impurity model, and identify it a fundamental ...
WenJie Hou +4 more
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Ultrafast dynamics in InAs quantum dot and GaInNAs quantum well semiconductor heterostructures
, 2007 The quantum confined Stark effect (QCSE) and ultrafast absorption dynamics near the bandedge have been investigated in p-i-n waveguides comprising quantum confined heterostructures grown on GaAs substrates, for emission at 1.3um.
Malins, David B
core
The development of magnetic tunnel junction fabrication techniques
, 2005 The discovery of large, room temperature magnetoresistance (MR) in magnetic tunnel junctions in 1995 sparked great interest in these devices. Their potential applications include hard disk read head sensors and magnetic random access memory (MRAM ...
core +1 more source
Aromaticity switching by quantum tunnelling
Chemical ScienceCarbon tunnelling in pentalene-based polycyclic molecules enables ultrafast π-bond rearrangements switching local aromaticity/antiaromaticity, or leading to a quantum “Schrödinger's aromaticity cat” in a coherent tunnelling regime.
Sindy Julieth Rodríguez-Sotelo +4 more
openaire +2 more sources
Probing Near‐Field EM Fluctuations in Superparamagnetic CoFeB With NV Quantum Dephasometry
Advanced Optical Materials, EarlyView.We non‐invasively investigate the superparamagnetic spin dynamics of a 1.1 nm CoFeB layer by probing its near‐field EM fluctuations using NV centers‐based quantum dephasometry. Our findings are further supported by theoretical modeling and SQUID‐based magnetization characterization. These results provide critical insight into the magnetization dynamics
Shoaib Mahmud +5 more
wiley +1 more source
Communications PhysicsGraphene nanoribbon heterojunctions are promising one-dimensional materials for quantum electronics due to their tunable bandgap and sizable quantum confinement.
Ye Jiang +6 more
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