Results 51 to 60 of about 39,774 (284)

Ultra-thin van der Waals crystals as semiconductor quantum wells

Nature Communications, 2020
A plethora of solid-state nanodevices rely on engineering the quantization of electrons in quantum wells. Here, the authors leverage the thickness of exfoliated 2D crystals to control the quantum well dimensions in few-layer semiconductor InSe and ...
Johanna Zultak, Samuel J. Magorrian, Maciej Koperski, Alistair Garner, Matthew J. Hamer, Endre Tóvári, Kostya S. Novoselov, Alexander A. Zhukov, Yichao Zou, Neil R. Wilson, Sarah J. Haigh, Andrey V. Kretinin, Vladimir I. Fal’ko, Roman Gorbachev   +13 more
doaj   +1 more source

Quantum tunneling without a barrier [PDF]

Physical Review A
Tunneling is an iconic concept that captures the peculiarity of quantum dynamics but, despite its ubiquity, questions remain. We focus on strong-field tunneling, which is vital to all attosecond science. We find an unexpected optical tunneling event that happens when the instantaneous electric field vanishes and there is no barrier.
Anne Weber, Margarita Khokhlova, Emilio Pisanty   +2 more
openaire   +2 more sources

MOFs and COFs in Electronics: Bridging the Gap between Intrinsic Properties and Measured Performance

Advanced Functional Materials, EarlyView.
Metal‐organic frameworks (MOFs) and covalent organic frameworks (COFs) hold promise for advanced electronics. However, discrepancies in reported electrical conductivities highlight the importance of measurement methodologies. This review explores intrinsic charge transport mechanisms and extrinsic factors influencing performance, and critically ...
Jonas F. Pöhls, R. Thomas Weitz
wiley   +1 more source

Non-KAM classical chaos topology for electrons in superlattice minibands determines the inter-well quantum transition rates

Scientific Reports
We investigate the quantum-classical correspondence for a particle tunnelling through a periodic superlattice structure with an applied bias voltage and an additional tilted harmonic oscillator potential.
F. Wang, M. T. Greenaway, A. G. Balanov, T. M. Fromhold   +3 more
doaj   +1 more source

Quantum beats in the polarization response of a dielectric to intense few-cycle laser pulses

New Journal of Physics, 2013
We have investigated the polarization response of a dielectric to intense few-cycle laser pulses with a focus on interband tunnelling. Once charge carriers are created in an initially empty conduction band, they make a significant contribution to the ...
M Korbman, S Yu Kruchinin, V S Yakovlev
doaj   +1 more source

Chaos assisted tunnelling with cold atoms

, 2000
In the context of quantum chaos, both theory and numerical analysis predict large fluctuations of the tunnelling transition probabilities when irregular dynamics is present at the classical level. We consider here the non-dissipative quantum evolution of
A. Mouchet, A.L.C., B. Chirikov, B. Grémaud, C. Cohen-Tannoudji, C. Miniatura, C. Zener, D. Delande, E.J. Heller, E.L. Sibert, E.M. Zanardi, F. Leyvraz, F.L. Moore, G. Floquet, G. Labeyrie, J. Callaway, J. Reichel, J. von Neumann, J. Zakrzewski, J. Zakrzewski, J.-P. Bouchaud, J.H. Shirley, J.P. Rose, J.P. Rose, K. Drese, L. Guidoni, M. Abramowitz, M. Ben Dahan, M. Kasevich, M. Morinaga, M. Weidemüller, M. Wilkinson, M. Wilkinson, M.E. Kellman, M.J. Davis, N.W. Ashcroft, O. Bohigas, O. Bohigas, P. Lebøeuf, Q. Niu, R. Balian, R. Graham, R. Kaiser, R. Roncaglia, R.S. Knox, R.T. Lawton, S. Feng, S. Tomsovic, S. Washburg, S.C. Creagh, T. Jonckheere, T.M. Cherry, V. Averbukh, V. Vuletić, W.A. Lin, W.H. Louisell, Y.B. Zeldovich   +56 more
core   +3 more sources

Quantum tunneling in nuclear fusion [PDF]

Reviews of Modern Physics, 1998
Recent theoretical advances in the study of heavy ion fusion reactions below the Coulomb barrier are reviewed. Particular emphasis is given to new ways of analyzing data, such as studying barrier distributions; new approaches to channel coupling, such as the path integral and Green function formalisms; and alternative methods to describe nuclear ...
Balantekin, A. B., Takigawa, N.
openaire   +2 more sources

Intermediate Resistive State in Wafer‐Scale Vertical MoS2 Memristors Through Lateral Silver Filament Growth for Artificial Synapse Applications

Advanced Functional Materials, EarlyView.
In MOCVD MoS2 memristors, a current compliance‐regulated Ag filament mechanism is revealed. The filament ruptures spontaneously during volatile switching, while subsequent growth proceeds vertically through the MoS2 layers and then laterally along the van der Waals gaps during nonvolatile switching.
Yuan Fa, Milan Buttberg, Ke Ran, Rana Walied Ahmad, Dennis Braun, Lukas Völkel, Jimin Lee, Sofía Cruces, Bart Macco, Bárbara Canto, Holger Lerch, Thorsten Wahlbrink, Holger Kalisch, Michael Heuken, Andrei Vescan, Joachim Mayer, Zhenxing Wang, Ilia Valov, Stephan Menzel, Max C. Lemme   +19 more
wiley   +1 more source

Quantum tunneling and stochastic resonance [PDF]

Physical Review E, 1996
Stochastic resonance (SR) occurs in nonlinear dynamical systems when the response to a weak coherent input is enhanced by the presence of noise. While classical SR presently is an intensely studied phenomenon, the role of quantum fluctuations has only started to be explored.
Grifoni, Milena, Hartmann, Ludwig, Berchtold, Sabine, Hänggi, Peter   +3 more
openaire   +4 more sources

2D Magnetic and Topological Quantum Materials and Devices for Ultralow Power Spintronics

Advanced Functional Materials, EarlyView.
2D magnets and topological quantum materials enable ultralow‐power spintronics by combining robust magnetic order with symmetry‐protected, Berry‐curvature‐driven transport. Fundamentals of 2D anisotropy and spin‐orbit‐coupling induced band inversion are linked to scalable growth and vdW stacking.
Brahmdutta Dixit, Yifei Yang, Shawn Li, Yu‐Chia Chen, Qi Jia, Jian‐Ping Wang   +5 more
wiley   +1 more source