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Field-free superconducting diode in a magnetically nanostructured superconductor
Ji Jiang, M. V. Milošević, Yong-Lei Wang +3
A strong superconducting diode effect (SDE) is revealed in a thin superconducting film periodically nanostructured with magnetic dots. The SDE is caused by the current-activated di…
Superconducting diode effect via conformal-mapped nanoholes
Yang-Yang Lyu, Ji Jiang, Yong-Lei Wang +10
A superconducting diode is an electronic device that conducts supercurrent and exhibits zero resistance primarily for one direction of applied current. Such a dissipationless diode…
Reversible ratchet effects in a narrow superconducting ring
Ji Jiang, Yong-Lei Wang, M. V. Milošević +3
We study the ratchet effect in a narrow pinning-free superconductive ring based on time-dependent Ginzburg-Landau (TDGL) equations. Voltage responses to external dc an ac currents…
Three-dimensional electron-hole superfluidity in a superlattice close to room temperature
M. Van der Donck, S. Conti, A. Perali +4
Although there is strong theoretical and experimental evidence for electron-hole superfluidity in separated sheets of electrons and holes at low , extending superfluidity to hig…
Experimental conditions for observation of electron-hole superfluidity in GaAs heterostructures
Samira Saberi-Pouya, Sara Conti, Andrea Perali +4
The experimental parameter ranges needed to generate superfluidity in optical and drag experiments in GaAs double quantum wells are determined, using a formalism that includes self…
Multicomponent screening and superfluidity in gapped electron-hole double bilayer graphene with realistic bands
Sara Conti, Andrea Perali, Francois M. Peeters +1
Superfluidity has recently been reported in double electron-hole bilayer graphene. The multiband nature of the bilayers is important because of the very small band gaps between con…
Large gap electron-hole superfluidity and shape resonances in coupled graphene nanoribbons
M. Zarenia, A. Perali, F. M. Peeters +1
We predict enhanced electron-hole superfluidity in two coupled electron-hole armchair-edge terminated graphene nanoribbons separated by a thin insulating barrier. In contrast to gr…
Hamiltonian of a many-electron system with single-electron and electron-pair states in a two-dimensional periodic potential
G. -Q. Hai, F. M. Peeters
Based on the metastable electron-pair energy band in a two-dimensional (2D) periodic potential obtained previously by Hai and Castelano [J. Phys.: Condens. Matter 26, 115502 (2014)…
Temporary cooling of quasiparticles and delay in voltage response of superconducting bridges after abrupt switching on the supercritical current
D. Yu. Vodolazov, F. M. Peeters
We revisit the problem of the dynamic response of a superconducting bridge after abruptly switching on the supercritical current . In contrast to previous theoretical works…
Critical superconductors
A. Vagov, A. A. Shanenko, M. V. Milošević +3
Bogomolnyi critical point, originally introduced in string theories, is fundamental to superconductivity. At the critical temperature T_c it marks the sharp border between ideally…
Soft vortex matter in a type-I/type-II superconducting bilayer
L. Komendová, M. V. Milošević, F. M. Peeters
Magnetic flux patterns are known to strongly differ in the intermediate state of type-I and type-II superconductors. Using a type-I/type-II bilayer we demonstrate hybridization of…
Realization of Artificial Ice Systems for Magnetic Vortices in a Superconducting MoGe Thin-film with Patterned Nanostructures
M. L. Latimer, G. R. Berdiyorov, Z. L. Xiao +2
We report an anomalous matching effect in MoGe thin films containing pairs of circular holes arranged in such a way that four of those pairs meet at each vertex point of a square l…
Superconducting transition temperature of Pb nanofilms: Impact of the thickness-dependent oscillations of the phonon mediated electron-electron coupling
Yajiang Chen, A. A. shanenko, F. M. Peeters
To date, several experimental groups reported measurements of the thickness dependence of T_c of atomically uniform single-crystalline Pb nanofilms. The reported amplitude of the T…
Two-band superconductors: Extended Ginzburg-Landau formalism by a systematic expansion in small deviation from the critical temperature
A. V. Vagov, A. A. Shanenko, M. V. Milošević +2
We derive the extended Ginzburg-Landau (GL) formalism for a clean s-wave two-band superconductor by employing a systematic expansion of the free-energy functional and the correspon…
Spatially-dependent sensitivity of superconducting meanders as single-photon detectors
G. R. Berdiyorov, M. V. Milošević, F. M. Peeters
The photo-response of a thin current-carrying superconducting stripe with a 90-degree turn is studied within the time-dependent Ginzburg-Landau theory. We show that the photon acti…
Large Magnetoresistance Oscillations in Mesoscopic Superconductors Due to Current-Excited Moving Vortices
G. R. Berdiyorov, M. V. Milošević, M. L. Latimer +3
We show in the case of a superconducting Nb ladder that a mesoscopic superconductor typically exhibits magnetoresistance oscillations whose amplitude and temperature dependence are…
Two-band superconductors: Hidden criticality deep in the superconducting state
L. Komendová, Yajiang Chen, A. A. Shanenko +2
We show that two-band superconductors harbor hidden criticality deep in the superconducting state, stemming from the critical temperature of the weaker band taken as an independent…
Superconducting proximity effect in graphene under inhomogeneous strain
Lucian Covaci, Francois Peeters
The interplay between quantum Hall states and Cooper pairs is usually hindered by the suppression of the superconducting state due to the strong magnetic fields needed to observe t…
Enhancement of the retrapping current of superconducting microbridges of finite length
D. Y. Vodolazov, F. M. Peeters
We theoretically find that the resistance of a superconducting microbridge/nanowire {\it decreases} while the retrapping current for the transition to the superconducting sta…
Extended Ginzburg-Landau formalism: systematic expansion in small deviation from the critical temperature
A. V. Vagov, A. A. Shanenko, M. V. Milošević +2
Based on the Gor'kov formalism for a clean s-wave superconductor, we develop an extended version of the single-band Ginzburg-Landau (GL) theory by means of a systematic expansion i…
Formation of multi-quanta vortices in superconductors: electronic, calorimetric and magnetic evidence
Ben Xu, M. V. Milošević, Shi-Hsin Lin +2
The ground state with vorticity larger than one in mesoscopic superconductors in applied magnetic field may manifest as a `giant'-vortex, where all vortices coalesce into a single…
Different length-scales for order parameters in two-gap superconductors: the extended Ginzburg-Landau theory
L. Komendová, M. V. Milošević, A. A. Shanenko +1
Using the Ginzburg-Landau theory extended to the next-to-leading order we determine numerically the healing lengths of the two order parameters at the two-gap superconductor/normal…
Heating of quasiparticles driven by oscillations of the order parameter in short superconducting microbridges
D. Y. Vodolazov, F. M. Peeters
We predict 'heating' of quasiparticles driven by order parameter oscillations in the resistive state of short superconducting microbridges. The finite relaxation time of the magnit…
Conditions for non-monotonic vortex interaction in two-band superconductors
A. Chaves, L. Komendová, M. V. Milošević +3
We describe a semi-analytic approach to the two-band Ginzburg-Landau theory, which predicts the behavior of vortices in two-band superconductors. We show that the character of the…