Moving flux quanta cool superconductors by a microwave breath

Dobrovolskiy, Oleksandr V.; González-Ruano, César; Lara, Antonio; Sachser, Roland; Bevz, V. M.; Shklovskij, Valerij A.; Bezuglyj, A. I.; Вовк, Р. В.; Huth, Michael; Aliev, F. G.

doi:10.1038/s42005-020-0329-z

Cited by 11 publications

(11 citation statements)

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“…The distinctive feature of the direct-write Nb-C superconductor is a close-toperfect edge barrier which orders the vortex motion at large current values and allows for the description of the spatial evolution of the FFI relying upon the edge-barrier-controlled FFI model. The observed high vortex velocities in Nb-C-FIBID make accessible studies of far-from-equilibrium superconductivity 61 and vortex matter driven by large currents, opening prospects for Cherenkov-like generation of other excitations by the fast-moving vortex lattice in ferromagnet/superconductor hybrid structures. In addition, the small electron diffusion coefficient D ≈ 0.5 cm 2 s −1 , the low superconducting transition temperature T c = 5.6 K, and high I c values exceeding 70% of the depairing current render Nb-C-FIBID to be an interesting candidate material for fast singlephoton detectors.…”

Section: Discussionmentioning

confidence: 99%

Ultra-fast vortex motion in a direct-write Nb-C superconductor

et al. 2020

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The ultra-fast dynamics of superconducting vortices harbors rich physics generic to nonequilibrium collective systems. The phenomenon of flux-flow instability (FFI), however, prevents its exploration and sets practical limits for the use of vortices in various applications. To suppress the FFI, a superconductor should exhibit a rarely achieved combination of properties: weak volume pinning, close-to-depairing critical current, and fast heat removal from heated electrons. Here, we demonstrate experimentally ultra-fast vortex motion at velocities of 10–15 km s−1 in a directly written Nb-C superconductor with a close-to-perfect edge barrier. The spatial evolution of the FFI is described using the edge-controlled FFI model, implying a chain of FFI nucleation points along the sample edge and their development into self-organized Josephson-like junctions (vortex rivers). In addition, our results offer insights into the applicability of widely used FFI models and suggest Nb-C to be a good candidate material for fast single-photon detectors.

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Section: Discussionmentioning

confidence: 99%

Ultra-fast vortex motion in a direct-write Nb-C superconductor

et al. 2020

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“…[747] Furthermore, the combination of superconductors with ferromagnets in curvilinear geometries should open novel prospects for superconducting spintronics, [748] proximity-induced spin-triplet superconductivity, [651,749] magnetic cloaking, [667,750] hybrid superconductor-ferromagnetic metamaterials [751][752][753] and the improvement of current-carrying ability of superconductors. [754,755] In addition, ferromagnetic decoration of curvilinear superconductors is expected to modify the signatures of vortex guiding [756,757] and ratchet effects, [758] flux-flow instability, [722,756,759] microwavestimulated superconductivity in the vortex state, [716,760] thereby advancing the development of 3D fluxonic circuits. [29,30]…”

Section: Discussionmentioning

confidence: 99%

“…[711] We note that while the microscopic derivation of the TDGL was originally done for a gapless superconductor with paramagnetic impurities, [712] the TDGL is also widely used for studying various aspects of current-driven vortex matter in gapped superconductors with nonmagnetic impurities [710,711] including the vortex dynamics at high vortex velocities [713,714] and at GHz ac frequencies. [715,716] For in-depth discussions of the applicability of the TDGL and its mathematical aspects we refer to refs. [710,711,715,717].…”

Section: Theoretical Description: Tdgl Equationmentioning

confidence: 99%

New Dimension in Magnetism and Superconductivity: 3D and Curvilinear Nanoarchitectures

et al. 2021

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condensed matter physics, including cell membranes, [1] nematic crystals, [2,3] superfluids, [4] semiconductors, [5][6][7][8] ferromagnets, [9] and superconductors. [10,11] Currently, much attention is paid to strongly correlated electronic systems, for example, ferromagnets and superconductors, as they provide a unique tool to manipulate the topology of coexisting vector and scalar fields, associated with geometries of conventional systems.Until recently, in the case of magnetism, the influence of the geometry on the spin vector fields was addressed primarily by the design of the sample boundaries. This approach naturally brings the shape anisotropy to the system and leads to the formation of specific spin textures, for example, magnetic vortices [12] and antivortices [13] as well as provides control over the dynamics of the topologically nontrivial magnetic solitons. [14][15][16][17][18] This discussion also tackles the state of the art in modern experimental antiferromagnetism, where the design of the sample topography and boundaries allows to control the domain wall states. [19][20][21][22] With the development of novel fabrication techniques allowing to realize complex 3D architectures, not only the boundary effects but also the extrinsic geometrical properties (e.g., local curvatures) can be addressed rigorously for the case of ferromagnets [23][24][25][26][27] as well as superconductors. [28][29][30] The explored effects are directly related to the interplay between the Traditionally, the primary field, where curvature has been at the heart of research, is the theory of general relativity. In recent studies, however, the impact of curvilinear geometry enters various disciplines, ranging from solid-state physics over soft-matter physics, chemistry, and biology to mathematics, giving rise to a plethora of emerging domains such as curvilinear nematics, curvilinear studies of cell biology, curvilinear semiconductors, superfluidity, optics, 2D van der Waals materials, plasmonics, magnetism, and superconductivity. Here, the state of the art is summarized and prospects for future research in curvilinear solid-state systems exhibiting such fundamental cooperative phenomena as ferromagnetism, antiferromagnetism, and superconductivity are outlined. Highlighting the recent developments and current challenges in theory, fabrication, and characterization of curvilinear micro-and nanostructures, special attention is paid to perspective research directions entailing new physics and to their strong application potential. Overall, the perspective is aimed at crossing the boundaries between the magnetism and superconductivity communities and drawing attention to the conceptual aspects of how extension of structures into the third dimension and curvilinear geometry can modify existing and aid launching novel functionalities. In addition, the perspective should stimulate the development and dissemination of research and development oriented techniques to facilitate rapid transitions from laboratory demonstrations to industry-...

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“…Beyond I c in the flux-flow regime, vortices, which are accelerated by the Lorentz force F L = I b × φ0 with I b being the bias current and φ0 the flux quantum, can move with high velocity v, [20,21] and eventually leads to a quench of the superconducting state at I * as a consequence of vortex instability (flux-flow instability, FFI), resulting in a sudden voltage jump in the currentvoltage curves. [6,7,[22][23][24][25][26] The maximal vortex velocity is therefore associated with the FFI phenomena. Researchers have demonstrated vortex velocities of a few km/s in traditional disordered and amorphous superconducting thin films, [27][28][29][30] and slightly faster vortex dynamics in unconventional high T c thick films.…”

Section: Introductionmentioning

confidence: 99%

Extremely fast vortices dynamics in Bi₂Sr₂Ca₂Cu₃O_10+δ crystalline nanostrip

et al. 2023

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The maximum velocity of a mobile vortex experiences during its movement is generally limited by the phenomenon of flux-flow instability (FFI), which necessitates weak vortex pinning and fast heat removal from non-equilibrium electrons. We here demonstrate exfoliations and nano-fabrications of Bi$_{2}$Sr$_{2}$Ca$_{2}$Cu$_{3}$O$_{10+\delta}$ crystalline nanostrips, which possess a rather weak pinning volume of vortices, relatively low resistivity, and large normal electron diffusion coefficient. The deduced vortex velocity in Bi$_{2}$Sr$_{2}$Ca$_{2}$Cu$_{3}$O$_{10+\delta}$ crystalline nanostrips can be up to 300 km/s near the superconducting transition temperature, well above the speed of sound. The observed vortex velocity is an order of magnitude faster than that of conventional superconducting systems, representing a perfect platform for exploration of ultra-fast vortex matter and a good candidate for fabrications of superconducting nanowire single photon detectors or superconducting THz modulator.

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Moving flux quanta cool superconductors by a microwave breath

Cited by 11 publications

References 83 publications

Ultra-fast vortex motion in a direct-write Nb-C superconductor

Ultra-fast vortex motion in a direct-write Nb-C superconductor

New Dimension in Magnetism and Superconductivity: 3D and Curvilinear Nanoarchitectures

Extremely fast vortices dynamics in Bi₂Sr₂Ca₂Cu₃O_10+δ crystalline nanostrip

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Moving flux quanta cool superconductors by a microwave breath

Cited by 11 publications

References 83 publications

Ultra-fast vortex motion in a direct-write Nb-C superconductor

Ultra-fast vortex motion in a direct-write Nb-C superconductor

New Dimension in Magnetism and Superconductivity: 3D and Curvilinear Nanoarchitectures

Extremely fast vortices dynamics in Bi2Sr2Ca2Cu3O10+δ crystalline nanostrip

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Extremely fast vortices dynamics in Bi₂Sr₂Ca₂Cu₃O_10+δ crystalline nanostrip