Results 91 to 100 of about 39,774 (284)

Quantum effect-based flexible and transparent pressure sensors with ultrahigh sensitivity and sensing density

Nature Communications, 2020
Though flexible pressure sensors with high sensitivity are attractive for health monitoring applications, existing device sensing mechanisms limit their practical applicability. Here, the authors report quantum tunnelling-based pressure sensors with high
Lan Shi, Zhuo Li, Min Chen, Yajie Qin, Yizhou Jiang, Limin Wu   +5 more
doaj   +1 more source

Direct Observation of Second Order Atom Tunnelling

, 2007
Tunnelling of material particles through a classically impenetrable barrier constitutes one of the hallmark effects of quantum physics. When interactions between the particles compete with their mobility through a tunnel junction, intriguing novel ...
Bloch, I., Cheinet, P., Feld, M., Foelling, S., Mueller, T., Saers, R., Trotzky, S., Widera, A.   +7 more
core   +1 more source

Strain Engineering of Magnetoresistance and Magnetic Anisotropy in CrSBr

Advanced Materials, EarlyView.
Biaxial compressive strain significantly enhances magnetoresistance and critical saturation fields in thin flakes of the 2D magnet CrSBr, along all three crystallographic axes. First‐principles calculations link these effects to strain‐induced increases in exchange interactions and magnetic anisotropy.
Eudomar Henríquez‐Guerra, Alberto M. Ruiz, Marta Galbiati, Álvaro Cortés‐Flores, Daniel Brown, Esteban Zamora‐Amo, Lisa Almonte, Andrei Shumilin, Juan Salvador‐Sánchez, Ana Pérez‐Rodríguez, Iñaki Orue, Andrés Cantarero, Andres Castellanos‐Gomez, Federico Mompeán, Mar Garcia‐Hernandez, Efrén Navarro‐Moratalla, Enrique Diez, Mario Amado, José J. Baldoví, M. Reyes Calvo   +19 more
wiley   +1 more source

Confinement in a Double Barrier Structure in the Presence of an Electric Field

, 1996
The effect of electric field on the electron resonant tunnelling into a double barrier structure is studied. We show for particular field strengths an increase of the tunnelling time which leads us to explain the Stark-ladder localization and Bloch ...
Agullo-Rueda, Bastard, Bauer, Buttiker, Cota, Gonzalez de la Cruz, Harada, Harwit, James, Kouwenhoven, Levine, Levine, Mendez, Mendez, Mendez, N. Zekri, R. Ouasti, S.M.A. Nimour, Tsu, Wannier, Yamamoto, Zekri   +21 more
core   +1 more source

Stepwise On‐Surface Synthesis and Transformations of Two‐Dimensional Covalent Organic Frameworks by Controlled Thermal Stimuli

Advanced Materials, EarlyView.
The seminal transformation of a 2D‐COF (SURFCOF‐IMDEA1) into a 2D porous COF (SURFCOF‐IMDEA2) on Au(111) by a sequential C‐C coupling and ladderization triggered by thermal annealing steps at increasing temperatures is reported. Abstract The development of covalent organic frameworks (COFs) is currently a primary objective in materials science, taking ...
Ana Barragán, Elena Pérez‐Elvira, Diego J. Vicent, Marco Lozano, Diego Soler‐Polo, Koen Lauwaet, José M. Gallego, Rodolfo Miranda, José I. Urgel, Pavel Jelínek, Nazario Martín, David Écija   +11 more
wiley   +1 more source

Tunnelling Studies of Two-Dimensional States in Semiconductors with Inverted Band Structure: Spin-orbit Splitting, Resonant Broadening

, 1996
The results of tunnelling studies of the energy spectrum of two-dimensional (2D) states in a surface quantum well in a semiconductor with inverted band structure are presented.
A. V. Germanenko, A. V. Germanenko, B. Freytag, C. A. Hoffman, D. C. Tsui, D. C. Tsui, E. Böckenhoff, F. J. Ohkawa, G. C. La Rocca, G. L. Bir, G. M. Minkov, G. M. Minkov, G. M. Minkov, G. M. Minkov, I. Nachev, J. Müller, J. R. Meyer, J. Slinkman, L. G. Gerchikov, L. P. Zverev, L. P. Zverev, M. I. Dyakonov, M. V. Kisin, O. E. Rut, P. Bauernschmitt, Pawel Sobkowicz, R. A. Suris, R. Sizmann, R. Stepniewski, R. Winkler, R. Wollrab, V. A. Larionova, V. F. Radantsev, V. F. Radantsev, V. F. Radantsev, Y. A. Bychkov, Y. R. Lin-Liu   +36 more
core   +1 more source

Microscopic Insights into Magnetic Warping and Time‐Reversal Symmetry Breaking in Topological Surface States of Rare‐Earth‐Doped Bi2Te3

Advanced Materials, EarlyView.
Magnetic doping of the topological insulator Bi2Te3 with erbium adatoms induces out‐of‐plane magnetism and breaks time‐reversal symmetry, opening a Dirac gap and driving a Fermi surface transition from hexagonal to star‐of‐David geometry. Microscopy, spectroscopy, and magnetic dichroism reveal atomically controlled magnetic interactions that tailor the
Beatriz Muñiz Cano, Fabián Calleja, Ji Dai, Massimo Tallarida, Vera Marinova, Alessandro Barla, Marc G. Cuxart, Pierluigi Gargiani, Gonzalo N. Molina, José Angel Silva‐Guillén, Adriana I. Figueroa, Kevin García‐Díez, Sergio O. Valenzuela, Aitor Mugarza, Amadeo L. Vázquez de Parga, Rodolfo Miranda, Francisco Guinea, Manuela Garnica, Miguel A. Valbuena   +18 more
wiley   +1 more source

Tunnelling Methods and Hawking's radiation: achievements and prospects

, 2011
The aim of this work is to review the tunnelling method as an alternative description of the quantum radiation from black holes and cosmological horizons.
't Hooft G, Acquaviva G Di Criscienzo R Vanzo L Zerbini S, Akbar M, Angheben M, Angheben M, Arzano M, Ashtekar A, Ashtekar A, Ashtekar A, Astefanesei D, Banerjee R, Banerjee R, Banerjee R, Belinski V A, Birrell N D, Bros J, Cai R G, Cai R G, Caldarelli M Vanzo L Zerbini S, Chen D Y Jiang Q Q Zu X T, Chen Y X Shao K N, Clifton T, Deser S, Deser S, Di Criscienzo R, Di Criscienzo R, Di Criscienzo R, Flambaum V V, Frolov V P, G Acquaviva, Gillani U A Rehman M Saifullah K, Gillani U A Saifullah K, Griffiths J B, Grumiller D, Gullstrand A, Hayward S A, Hayward S A, Hayward S A, Hayward S A Di Criscienzo R Nadalini M Vanzo L Zerbini S, Hayward S A Di Criscienzo R Nadalini M Vanzo L Zerbini S, He T M, Iguchi H, Jacobson T, Jacobson T, Jian T, Jiang K X, Kerner R, Kiefer C, Kim S P, Kraus P, L Vanzo, Landau L D, Li H L, Li H L, Li H L, Li H L, Li H L, Li R, Lin K, Lin K, Lindesay J, Lindesay J, Ma Z Z, Mann R B, Matsuno K Umetsu K, McVittie G C, Medved A J M, Miyamoto U Nemoto H Shimano M, Moretti V Pinamonti N, Mukohyama S, Nadalini M, Nakamura T K, Nariai H, Nielsen A, Nielsen A B, Nielsen A B, Nojiri S, Nolan B C, Nolan B C, Nozari K, Nozari K, Page D N, Painlevé P, Parikh M K, Parikh M K, Pizzi M, Podolsky J, R Di Criscienzo, Rabinowitz M, Rehman M, Sarkar S, Sekiwa Y, Shankaranarayanan S, Stotyn S, Szabados L B, Tolman R C, Traschen J H, Vaidya P C, Vanzo L, Vanzo L, Volovik G E, Wald R M, Wang Q, Wu S F, Wu S Q Jiang Q Q, Yale A, Yang J, Yang S Z, Zhang J Y, Zhang J Zhao Z, Zhao L, Zhu T, Åminneborg S   +112 more
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Opportunities of Semiconducting Oxide Nanostructures as Advanced Luminescent Materials in Photonics

Advanced Materials, EarlyView.
The review discusses the challenges of wide and ultrawide bandgap semiconducting oxides as a suitable material platform for photonics. They offer great versatility in terms of tuning microstructure, native defects, doping, anisotropy, and micro‐ and nano‐structuring. The review focuses on their light emission, light‐confinement in optical cavities, and
Ana Cremades, Pedro Hidalgo, David Maestre, Ruth Martínez‐Casado, Emilio Nogales, Beatriz Rodríguez, G. Cristian Vásquez, Bianchi Méndez   +7 more
wiley   +1 more source

Suppression of weak-localization (and enhancement of noise) by tunnelling in semiclassical chaotic transport

, 2007
We add simple tunnelling effects and ray-splitting into the recent trajectory-based semiclassical theory of quantum chaotic transport. We use this to derive the weak-localization correction to conductance and the shot-noise for a quantum chaotic cavity ...
F. Haake, K. Richter, Robert S. Whitney
core   +1 more source