Results 51 to 60 of about 48,619 (333)

Addressing student models of energy loss in quantum tunnelling

, 2005
We report on a multi-year, multi-institution study to investigate student reasoning about energy in the context of quantum tunnelling. We use ungraded surveys, graded examination questions, individual clinical interviews, and multiple-choice exams to ...
Bao L, Domert D, Jeffrey T Morgan, Lei Bao, McDermott L C, Michael C Wittmann, Morgan J T Wittmann M C Thompson J R Cummings K C Franklin S Marx J, Redish E F, Redish E F Steinberg R N Wittmann M C, Wittmann M C, Wittmann M C Morgan J T Franklin S Cummings K C Marx J   +10 more
core   +1 more source

Suppression of Quantum Phase Interference in Molecular Magnets Fe₈ with Dipolar-Dipolar Interaction [PDF]

, 2002
Renormalized tunnel splitting with a finite distribution in the biaxial spin model for molecular magnets is obtained by taking into account the dipolar interaction of enviromental spins.
A. Cuccoli, A. Garg, B. Barbara, D.A. Garanin, E. Rastelli, E.M. Chudnovsky, J. Liu, J.-Q. Liang, J.Q. Liang, M. Ueda, M.N. Leuenberger, N.V. Prokof’ev, N.V. Prokof’ev, N.V. Prokof’ev, N.V. Prokof’ev, R.G. Palmer, S. Miyashita, Shun-Qing Shen, T. Ohm, T. Ohm, W. Wernsdorfer, W. Wernsdorfer, W. Wernsdorfer, Y.H. Jin, Z.D. Chen, Zhi-De Chen   +25 more
core   +2 more sources

Reducing Open‐Circuit Voltage Losses in Wide‐Bandgap FAPbBr3 Perovskite Solar Cells for Continuous Unassisted Light‐Driven Water Splitting

Advanced Functional Materials, EarlyView.
The combination of formamidinium thiocyanate and 1,3‐propane diammonium iodide for bulk and top‐surface passivation, and a ternary fullerene blend to improve energy band alignment, suppresses energy losses in wide‐bandgap FAPbBr3 perovskite solar cells.
Laura Bellini, Daniël Grosfeld, Bruno Branco, Guus J. W. Aalbers, Lana M. Kessels, Willemijn H. M. Remmerswaal, Nicolas Daub, Kunal Datta, Martijn M. Wienk, René A. J. Janssen   +9 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

Complex lapse, complex action and path integrals [PDF]

, 1995
Imaginary time is often used in quantum tunnelling calculations. This article advocates a conceptually sounder alternative: complex lapse. In the ``3+1'' action for the Einstein gravitational field minimally coupled to a Klein-Gordon field, allowing the ...
A. Carlini, A. E. Fischer, A. Linde, C. Itzykson, F. Embacher, F. Embacher, F. Embacher, G. Ellis, G. W. Gibbons, J. Greensite, J. J. Halliwell, J. J. Halliwell, J. J. Halliwell, M. Gell-Mann, S. A. Hayward, S. A. Hayward, S. A. Hayward, S. K. Blau, S. W. Hawking, Sean A. Hayward   +19 more
core   +2 more sources

Spectrally Tunable 2D Material‐Based Infrared Photodetectors for Intelligent Optoelectronics

Advanced Functional Materials, EarlyView.
Intelligent optoelectronics through spectral engineering of 2D material‐based infrared photodetectors. Abstract The evolution of intelligent optoelectronic systems is driven by artificial intelligence (AI). However, their practical realization hinges on the ability to dynamically capture and process optical signals across a broad infrared (IR) spectrum.
Junheon Ha, Yingshan Ma, Yong Nam An, Sung‐Un An, Hyeon Hak Jung, Suvi‐Tuuli Varjamo, Jiwon Yoo, Junho Min, Hanvit Kim, Faisal Ahmed, Sang Hoon Chae, Young Min Song, Weiwei Cai, Tawfique Hasan, Zhipei Sun, Dong‐Ho Kang, Hyeon‐Jin Shin, Yunyun Dai, Hoon Hahn Yoon   +18 more
wiley   +1 more source

Macroscopic quantum tunnelling of a Bose-Einstein condensate in a Cubic-Plus-Quadratic Well

AAPPS Bulletin
We study the macroscopic quantum tunnelling of an interacting Bose-Einstein condensate in a cubic-plus-quadratic well that was approximately realized in recent experiment.
Rui-Bin Liu, Mingyang Liu, Shizhong Zhang   +2 more
doaj   +1 more source

Conformation-driven quantum interference effects mediated by through-space conjugation in self-assembled monolayers

Nature Communications, 2016
Tunnelling currents through molecular junctions are affected by quantum interference effects, but understanding the factors leading to them remains a challenge.
Marco Carlotti, Andrii Kovalchuk, Tobias Wächter, Xinkai Qiu, Michael Zharnikov, Ryan C. Chiechi   +5 more
doaj   +1 more source

Resonant tunneling driven metal-insulator transition in double quantum-well structures of strongly correlated oxide

Nature Communications, 2021
The metal-insulator transition is typically controlled by carrier accumulation or chemical doping. Here, the authors realize an alternative method based on resonant tunnelling in a double quantum well structure of strongly correlated oxides, which offers
R. Yukawa, M. Kobayashi, T. Kanda, D. Shiga, K. Yoshimatsu, S. Ishibashi, M. Minohara, M. Kitamura, K. Horiba, A. F. Santander-Syro, H. Kumigashira   +10 more
doaj   +1 more source

Photoconductivity‐Driven Quantum Efficiency Gain in Inorganic Ruddlesden‐Popper Layered Cs2PbBr2I2 Perovskite Photodetector for Visible Light Detection

Advanced Functional Materials, EarlyView.
Rational halogen mixing strategy was employed to shift the bandgap of Cs2PbBr2I2 from ultraviolet to visible region, enabling first realization of a visible‐light photodetector with this 2D layered Ruddlesden‐Popper perovskite material. Under illumination, light‐induced internal field forms and drives trap‐mediated persistent photoconductivity ...
Md Fahim Al Fattah, Asif Abdullah Khan, Saikiran Khamgaonkar, Majid Haji Bagheri, Danyah Khan, Md Rasidul Islam, Mahmoud Almadoun, Aixi Pan, Alexander Li, Marwa Abd‐Ellah, Vivek Maheshwari, Dayan Ban   +11 more
wiley   +1 more source