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Flat-Band AC Transport in Nanowires.
Nanomaterials (Basel)
December 2024
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Mexico City 04510, Mexico.
The electronic states in flat bands possess zero group velocity and null charge mobility. Recently, flat electronic bands with fully localized states have been predicted in nanowires, when their hopping integrals between first, second, and third neighbors satisfy determined relationships. Experimentally, these relationships can only be closely achieved under external pressures.
View Article and Find Full Text PDFCritical Lengths of Kitaev Chains for Majorana Zero Modes with a Microsecond Coherence Time and a Quantized Conductance Signature.
Materials (Basel)
December 2024
Computational Nanoelectronics Group, University of Zagreb Faculty of Electrical Engineering and Computing, HR 10000 Zagreb, Croatia.
The problems of disorder and insufficient system length are generally regarded as central problems in the realization of Majorana zero modes (MZM), which are a promising platform for realizing fault-tolerant topological quantum computing (TQC). In this work, we analyze eigenenergy spectra and transport properties of finite Kitaev chains using quantum transport simulations in a wide design space of hopping amplitude (), superconductor pairing (Δ), and electrochemical potential. Our goal is to determine critical or minimum acceptable chain lengths to obtain oscillation-free MZMs with suitable microsecond coherence times, and observable zero-bias conductance peaks (ZBCP) quantized almost at ~2/.
View Article and Find Full Text PDFThis study introduces a simplified method for scanning the optical frequency of an external cavity diode laser (ECDL) locked to an optical frequency comb (OFC) with a repetition rate of 250 MHz. Previous techniques have often been intricate, especially when dealing with a task of comb-mode hopping. In contrast, our method simplifies the mode-hoping method by tuning the piezoelectric transducer (PZT) at a rate of frep/2, while keeping the diode current locked to a fixed-frequency local oscillator (LO) at frep/4.
View Article and Find Full Text PDFEffect of load-resisting force on photoisomerization mechanism of a single second generation light-driven molecular rotary motor.
J Chem Phys
October 2024
Ministry of Education Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Shaanxi Province Key Laboratory of Quantum Information and Quantum Optoelectronic Devices, School of Physics, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, People's Republic of China.
A pivotal aspect of molecular motors is their capability to generate load capacity from a single entity. However, few studies have directly characterized the load-resisting force of a single light-driven molecular motor. This research provides a simulation analysis of the load-resisting force for a highly efficient, second-generation molecular motor developed by Feringa et al.
View Article and Find Full Text PDFFrequency-Controlled Fluidic Oscillators for Soft Robots.
Adv Sci (Weinh)
November 2024
Department of Engineering, King's College London, Strand, London, WC2R2LS, UK.
Electronic-free controls have recently emerged as one of the main topics in soft robotics. However, electronic-free fluidic circuits still lack controllability and reconfigurability to achieve different functions. Here, reconfigurable pneumatic valves that widen the design space of fluidic circuits are presented.
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