Results 111 to 120 of about 1,956,567 (332)
Macroscopic quantum self-trapping and atomic tunneling in two-species Bose-Einstein condensates
, 2000 We present a new theoretical treatment of macroscopic quantum self-trapping (MQST) and quantum coherent atomic tunneling in a zero-temperature two-species Bose-Einstein condensate system in the presence of the nonlinear self-interaction of each species ...
Kuang, Le-Man, Ouyang, Zhong-Wen
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Advanced Functional Materials, EarlyView.Topological van der Waals contacts represent a new class of electrodes for 2D semiconductors, enabling precise control of the Schottky barrier height (SBH) and contact resistance (RC) through interlayer distance and orbital hybridization engineering. In Se‐based transition metal dichalcogenides, these contacts achieve an ultralow SBH of 7 meV, RC of 0.
Soheil Ghods +15 more
wiley +1 more source
Mesoscopic effects in tunneling between parallel quantum wires
, 2001 We consider a phase-coherent system of two parallel quantum wires that are coupled via a tunneling barrier of finite length. The usual perturbative treatment of tunneling fails in this case, even in the diffusive limit, once the length L of the coupling ...
A. Altland +53 more
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Observation of Relativistic Domain Wall Motion in Amorphous Ferrimagnets
Advanced Functional Materials, EarlyView.Domain walls in ferrimagnets and antiferromagnets move as relativistic sine‐Gordon solitons, with the spin‐wave velocity setting their speed limit. Such relativistic domain‐wall motion is demonstrated in amorphous GdFeCo near angular momentum compensation, where current‐driven walls reach 90% of the 2 kms−1 spin‐wave speed, enabling ultrafast, device ...
Pietro Diona +3 more
wiley +1 more source
What is the Computational Value of Finite-Range Tunneling?
Physical Review X, 2016 Quantum annealing (QA) has been proposed as a quantum enhanced optimization heuristic exploiting tunneling. Here, we demonstrate how finite-range tunneling can provide considerable computational advantage.
Vasil S. Denchev +7 more
doaj +1 more source
, 2007 Realisation of the first working sensor based on quantum tunneling between arrays of nanowires[1,2,3] is presented. The sensing element consists of 12,000 nanowires, each 90 nm wide and 5 mm long (~1:55,000 aspect ratio), on an area of 5 x 4.3 mm. The sensing element was fabricated using phase shift mask lithography and dry etch processes followed by ...
Marek, Michalewicz +4 more
openaire +1 more source
Quantum tunneling in two-dimensional van der Waals heterostructures and devices
Science China Materials, 2021 Sidi Fan +6 more
semanticscholar +1 more source
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 +11 more
wiley +1 more source
Tunneling, dissipation, and superfluid transition in quantum Hall bilayers
, 2004 We study bilayer quantum Hall systems at total Landau level filling factor $\nu=1$ in the presence of interlayer tunneling and coupling to a dissipative normal fluid.
B. Abeles +5 more
core +1 more source
Journal of Modern Physics, 2013 In this work, a mechanism of macroscopic quantum tunneling is studied, which shows this sort of phenomena may exist even in the bio-field system. The relevant Davydov solitons fields and the Feynman digraph have been constructed based on the nonlinear Green function theory, which allows one to get a synchronous resonance model to explain the ...
Qiao Bi, Kongzhi Song
openaire +2 more sources