Article
Chemistry, Multidisciplinary
Lucia Vigliotti, Fabio Cavaliere, Giacomo Passetti, Maura Sassetti, Niccolo Traverso Ziani
Summary: This study investigates a Josephson junction with coupled reconstructed topological channels, and finds a robust f(0) Josephson effect without the presence of external magnetic fields. The anomalous current increases as a function of temperature. These results have significant implications for the technological applications of superconductors and nanostructures.
Article
Materials Science, Multidisciplinary
Oleksii Maistrenko, Benedikt Scharf, Dirk Manske, Ewelina M. Hankiewicz
Summary: The study reveals that uniform magnetization in three-dimensional topological insulator Josephson junctions can induce asymmetry in the Andreev spectrum, leading to Majorana modes and the Josephson Hall effect. Magnetic control and gating can enable significant Josephson Hall currents compared to longitudinal currents.
Article
Physics, Applied
Samuel Boutin, Pedro L. S. Lopes, Anqi Mu, Udson C. Mendes, Ion Garate
Summary: Amplifiers based on Josephson junctions offer a fast and noninvasive method for reading superconducting qubits. Researchers predict that the bifurcation dynamics of a topological Josephson junction in the appropriate parameter regime can serve as an additional tool for detecting the emergence of Majorana bound states, as progress continues towards realizing fault-tolerant qubits based on these states.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Tobias W. Schmitt, Malcolm R. Connolly, Michael Schleenvoigt, Chenlu Liu, Oscar Kennedy, Jose M. Chavez-Garcia, Abdur R. Jalil, Benjamin Bennemann, Stefan Trellenkamp, Florian Lentz, Elmar Neumann, Tobias Lindstroem, Sebastian E. de Graaf, Erwin Berenschot, Niels Tas, Gregor Mussler, Karl D. Petersson, Detlev Gruetzmacher, Peter Schueffelgen
Summary: This study demonstrates the implementation of superconducting transmon qubits using topological insulator Josephson junctions. The results show the compatibility of these qubits with strong-coupling circuit quantum electrodynamics and their ability for qubit control and temporal quantum coherence.
Article
Materials Science, Multidisciplinary
Purna P. Paudel, Trey Cole, Benjamin D. Woods, Tudor D. Stanescu
Summary: Researchers proposed a semiconductor-superconductor hybrid device to achieve topological superconductivity and Majorana zero modes through modulating the junction width. They found that the modulated structure can substantially enhance the topological gap, improve the robustness of the topological superconducting phase, and cover a significant fraction of parameter space with a topological superconducting phase.
Article
Materials Science, Multidisciplinary
Qiang Cheng, Qing Yan, Qing-Feng Sun
Summary: Our study reveals that the Josephson effect in spin-triplet superconductor-quantum anomalous Hall insulator-spin-triplet superconductor junctions strongly depends on the orientations of the d vectors in superconductors, showing different effects for different configurations.
Article
Chemistry, Multidisciplinary
Kaifei Kang, Helmuth Berger, Kenji Watanabe, Takashi Taniguchi, Laszlo Forro, Jie Shan, Kin Fai Mak
Summary: Researchers have observed a thickness-driven 0-pi transition in Josephson junctions made of NbSe2 and Cr2Ge2Te6, and have also observed unusual supercurrent interference patterns near the critical thickness, indicating the formation of nanoscale domains in Cr2Ge2Te6.
Article
Physics, Multidisciplinary
Wei-Xiong Wu, Yang Feng, Yun-He Bai, Yu-Ying Jiang, Zong-Wei Gao, Yuan-Zhao Li, Jian-Li Luan, Heng-An Zhou, Wan-Jun Jiang, Xiao Feng, Jin-Song Zhang, Hao Zhang, Ke He, Xu-Cun Ma, Qi-Kun Xue, Ya-Yu Wang
Summary: We report transport measurements on Josephson junctions consisting of Bi2Te3 topological insulator thin films contacted by superconducting Nb electrodes. The critical supercurrent can be modulated by an electrical gate, indicating different transport properties in p-type and n-type regimes.
CHINESE PHYSICS LETTERS
(2021)
Article
Physics, Applied
Tobias W. Schmitt, Benedikt Frohn, Wilhelm Wittl, Abdur R. Jalil, Michael Schleenvoigt, Erik Zimmermann, Anne Schmidt, Thomas Schaepers, Juan Carlos Cuevas, Alexander Brinkman, Detlev Gruetzmacher, Peter Schueffelgen
Summary: In this study, the temperature-dependent behavior of a Bi2Te3-based Josephson junction (JJ) with transparent interfaces is investigated, providing insights into the contributions of bulk and surface states in topological insulator JJs. Differential conductance spectra of multiple Andreev reflections (MARs) are measured in electrical transport experiments, showing a qualitative temperature-dependent change from peak features to dip features. The observation of both types of MAR patterns in a single JJ suggests the presence of diffusive bulk and ballistic surface states, and their connection to the temperature dependence of the critical current. This work advances the understanding of induced superconductivity in topological insulators and offers new avenues for studying induced superconductivity in the topological surface states of these materials.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Taras Golod, Razmik A. Hovhannisyan, Olena M. Kapran, Vyacheslav V. Dremov, Vasily S. Stolyarov, Vladimir M. Krasnov
Summary: This work presents prototypes of a phase shifter utilizing Josephson phase shift generated by coreless superconducting vortices. The small size of the vortex enables broad-range tunability through nanoscale manipulation in a micron-size array of vortex traps. The phase shift in the device can be reconfigured between quantized states in a broad [-3 pi +3 pi] range with just a few vortex traps.
Article
Materials Science, Multidisciplinary
Yuejian Zhang, Xiping Yang, Jia-Jin Feng, Zhi Wang, Tianxing Ma
Summary: Josephson radiation is a useful signature for detecting Majorana zero modes in topological superconductors. The quantum dynamics of the Majorana two-level system induce oscillatory patterns in the Josephson emission spectra, which can be well described by Bessel functions. These Bessel radiation patterns exist for a wide range of junction parameters, as verified by numerical simulations.
Article
Materials Science, Multidisciplinary
Yu M. Shukrinov, I. R. Rahmonov, A. Janalizadeh, M. R. Kolahchi
Summary: We study the phase dynamics, IV characteristics, and magnetization dynamics of the phi(0) Josephson junction at small values of spin-orbit interaction, ratio of the Josephson junction to magnetic energy, and Gilbert damping. We demonstrate that the coupled Landau-Lifshitz-Gilbert-Josephson dynamics can be reduced to a scalar nonlinear Duffing oscillator. An anomalous shift of the ferromagnetic resonance frequency with decreasing Gilbert damping is found. There is a critical damping value at which nonlinearity comes into play and changes the damping dependence of the ferromagnetic resonance.
Article
Chemistry, Physical
D. Sanchez-Manzano, S. Mesoraca, F. A. Cuellar, M. Cabero, V. Rouco, G. Orfila, X. Palermo, A. Balan, L. Marcano, A. Sander, M. Rocci, J. Garcia-Barriocanal, F. Gallego, J. Tornos, A. Rivera, F. Mompean, M. Garcia-Hernandez, J. M. Gonzalez-Calbet, C. Leon, S. Valencia, C. Feuillet-Palma, N. Bergeal, A. I. Buzdin, J. Lesueur, Javier E. Villegas, J. Santamaria
Summary: Josephson effect is achieved over micrometres and at tens of kelvins by coupling the half-metallic manganite La0.7Sr0.3MnO3 with the superconducting cuprate YBa2Cu3O7. This opens new possibilities for superconducting spintronics and quantum computing.
Article
Materials Science, Multidisciplinary
Claudio Guarcello, Luca Chirolli, Maria Teresa Mercaldo, Francesco Giazotto, Mario Cuoco
Summary: This study demonstrates that a dynamical regime with oscillating phase evolution is a universal characteristic of driven Josephson systems with sign competition in the Josephson couplings, and can be initiated by changing the parameters that set the phase state.
Article
Chemistry, Multidisciplinary
Francesca Telesio, Matteo Carrega, Giulio Cappelli, Andrea Iorio, Alessandro Crippa, Elia Strambini, Francesco Giazotto, Manuel Serrano-Ruiz, Maurizio Peruzzini, Stefan Heun
Summary: We demonstrate evidence of Josephson coupling in a planar few-layer black phosphorus junction, confirming its existence and characteristics. These findings will accelerate further research on the unique properties of exfoliated black phosphorus thin flakes.
Article
Physics, Multidisciplinary
Lorenzo Rossi, Fabrizio Dolcini, Fausto Rossi
EUROPEAN PHYSICAL JOURNAL PLUS
(2020)
Article
Physics, Multidisciplinary
Julia S. Meyer, Manuel Houzet, Yuli Nazarov
PHYSICAL REVIEW LETTERS
(2020)
Correction
Physics, Multidisciplinary
Lorenzo Rossi, Fabrizio Dolcini, Fausto Rossi
EUROPEAN PHYSICAL JOURNAL PLUS
(2020)
Article
Physics, Multidisciplinary
Lorenzo Rossi, Fabrizio Dolcini, Fabio Cavaliere, Niccolo Traverso Ziani, Maura Sassetti, Fausto Rossi
Summary: By performing a quench experiment in an electron system with a local attractive potential, researchers have identified a deviation of only one lambda from the GGE and equilibrium distribution, leading to optical gain effects and a negative peak in the absorption spectrum. This allows for the detection of GGE signatures in fermionic systems through optical measurements in realistic setups.
Article
Physics, Multidisciplinary
Lorenzo Rossi, Fausto Rossi, Fabrizio Dolcini
Summary: For a half-filled SSH chain, the occupancy of each lattice site remains unchanged for any parameter quench due to the additional time-reversal and charge conjugation symmetries. However, a suitably designed local quench can break these additional symmetries and induce real-space dynamical effects, exhibiting different features in the topological and trivial phases.
NEW JOURNAL OF PHYSICS
(2022)
Article
Physics, Multidisciplinary
Leonid Gogin, Lorenzo Rossi, Fausto Rossi, Fabrizio Dolcini
Summary: A paradoxical situation arises at the interface between two massless Dirac models with opposite helicity, where a transversally impinging electron cannot be transmitted or reflected due to the locking between spin and momentum. However, when additional massive Dirac modes are taken into account, non-trivial scattering solutions to the paradox are shown to exist, allowing for finite and tunable transmission through the interface.
NEW JOURNAL OF PHYSICS
(2022)
Article
Physics, Multidisciplinary
Leonid Gogin, Fausto Rossi, Fabrizio Dolcini
Summary: We investigate the effects of the sign of the Rashba spin-orbit coupling (RSOC) on electron transmission through a nanowire, finding that transmission can be influenced by the presence and nature of an inhomogeneous RSOC and a magnetic field. We also discuss the implementation of different RSOC regions on a realistic nanowire setup.
NEW JOURNAL OF PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Lorenzo Rossi, Jan Carl Budich, Fabrizio Dolcini
Summary: We investigate how topology plays a role in the space-time scaling limit of quantum quench dynamics, where time and system size tend to infinity at a constant ratio. We introduce a dynamical winding number that encodes the linear response of the Berry phase to a magnetic flux and shows the presence of a locally invisible constant magnetic flux. This is characterized by a dynamical staircase behavior of the Berry phase and topologically quantized plateaus in the space-time scaling limit of a quenched Rice-Mele model.
Article
Materials Science, Multidisciplinary
Lorenzo Rossi, Luca Barbiero, Jan Carl Budich, Fabrizio Dolcini
Summary: We investigate the impact of charge conjugation symmetry breaking on the dynamics of a lattice system and identify the phenomenon of the "tsunami effect," where particle density remains constant for an extended period of time even after the breaking of chiral symmetry.
Article
Materials Science, Multidisciplinary
Lorenzo Rossi, Fabrizio Dolcini
Summary: This study investigates the dynamical effects of a magnetic flux quench in the Su-Schrieffer-Heeger model in a one-dimensional ring geometry. The results show that even when the system is initially in the half-filled insulating state, the flux quench induces a time-dependent current that eventually reaches a finite stationary value. This persistent current, which exists also in the thermodynamic limit, cannot be explained by linear response theory and represents a nonlinear dynamical effect associated with dimerization. Furthermore, the study demonstrates that for a range of dimerization strengths and initial flux values, the system exhibits dynamical quantum phase transitions despite the quench being performed within the same topological class of the model.
Article
Materials Science, Multidisciplinary
I Septembre, S. Koniakhin, J. S. Meyer, D. D. Solnyshkov, G. Malpuech
Summary: In a driven-dissipative nonlinear photonic system, the reflection of a linear wave on a superfluid demonstrates an analog of the Andreev reflection in superconductors. Bound states similar to Andreev states are found in a normal region surrounded by two superfluids, forming topological synthetic bands depending on the phase difference between the two superfluids. The band topology can be inverted and interface states can be created by adjusting the width of the normal region. Synthetic bands in this system are influenced by nonlinear non-Hermitian coupling, leading to a self-amplified strongly occupied topological state.
Article
Materials Science, Multidisciplinary
Julia S. Meyer, Manuel Houzet
Summary: Majorana zero modes have attracted significant attention as emergent quasiparticles in condensed-matter physics. A new and striking signature of the coupling between Majorana zero modes in a three-terminal Josephson junction made with topological superconductors has been proposed. This coupling leads to a nonzero quantized transconductance, with a quantization value of +2e(2)/h, which is predicted to be a generic feature of such junctions made with topological superconductors.
Article
Physics, Multidisciplinary
Baptiste Lamic, Julia S. Meyer, Manuel Houzet
PHYSICAL REVIEW RESEARCH
(2020)
Article
Materials Science, Multidisciplinary
Lorenzo Rossi, Fabrizio Dolcini, Fausto Rossi
Article
Materials Science, Multidisciplinary
F. Cavaliere, N. Traverso Ziani, F. Dolcini, M. Sassetti, F. Rossi
