A family of 2D coordination polymers were successfully synthesized through "bottom-up" techniques using Ni2+, Cu2+, Co2+, and hexaaminobenzene. Liquid–liquid air–liquid interfacial reactions used to realize thick (∼1–2 μm) thin (<10 nm) stacked layers nanosheet, respectively. Atomic-force microscopy scanning electron both revealed the smooth flat nature nanosheets. Selected area diffraction was elucidate hexagonal crystal structure framework. Electronic devices fabricated on samples Ni...

Abstract There has recently been a surge of interest in studying the superconducting diode effect (SDE) partly due to possibility uncovering intrinsic properties material system. A change sign SDE at finite magnetic field previously attributed different mechanisms. Here, we observe epitaxial Al-InAs Josephson junctions with strong Rashba spin-orbit coupling (SOC). We show that this strongly depends on orientation in-plane field. In presence field, SDE. Simulation and measurement supercurrent...

We have demonstrated the electronic structures and magnetic properties of single 3$d$ transition metal (TM) atoms encapsulated in noble clusters with icosahedral symmetry framework relativistic density functional theory. Orbital polarization corrections been used to obtain an upper-estimation for orbital moments all individual atoms. The are marginally affected spin moments, whereas they induce significant magnetism TM@X${}_{12}$ icosahedra. It is found that a superatomic picture has be...

In the presence of a 4π-periodic contribution to current phase relation, for example in topological Josephson junctions, odd Shapiro steps are expected be missing. While missing have been observed several material systems and interpreted context superconductivity, they also topologically trivial junctions. Here, we study evolution such Al-InAs junctions an in-plane magnetic field Bθ. We find that reappear at crossover Bθ value, exhibiting angle anisotropy depends on spin-orbit coupling...

We investigate the effects of an in-plane magnetic field on weak antilocalization signature near-surface quantum wells lacking bulk and inversion symmetry. The measured magnetoconductivity, which is conductivity as a function out-of-plane field, exhibits strong anisotropy with respect to direction field. twofold symmetry observed magnetoanisotropy originates from competition between Rashba Dresselhaus spin-orbit couplings. high sensitivity spin texture produced by combined Zeeman fields...

Three-dimensional (3D) semimetals have been predicted and demonstrated to a wide variety of interesting properties associated with their linear energy dispersion. In analogy two-dimensional (2D) Dirac semimetals, such as graphene, Cd3As2 has shown ultrahigh mobility large Fermi velocity hypothesized support plasmons at terahertz frequencies. this work, we experimentally demonstrate synthesis high-quality large-area thin films through thermal evaporation well the experimental realization...

Electrically conductive two‐dimensional (2D) metal–organic frameworks (MOFs) have emerged as good candidates for thermoelectric applications due to their high electrical and low thermal conductivities. This work studies the microscopic origin of properties copper benzenehexathiol (Cu‐BHT), a highly electrically 2D MOF. MOFs usually polycrystalline domains because bottom‐up synthesis, polycrystallinity makes it challenging understand intrinsic MOFs. Mesoscopic‐scale devices are fabricated...

The critical current response to an applied out-of-plane magnetic field in a Josephson junction provides insight into the uniformity of its distribution. In junctions with semiconducting weak links, carrier density, and therefore overall distribution, can be modified electrostatically via metallic gates. Here, we show local control distribution epitaxial Al-InAs equipped five minigates. We demonstrate that not only width defined but also profile locally adjusted form superconducting quantum...

There has recently been a surge of interest in studying the superconducting diode effect (SDE) partly due to possibility uncovering intrinsic properties material system. A change sign SDE at finite magnetic field previously attributed different mechanisms. Here, we observe epitaxial Al-InAs Josephson junctions with strong Rashba spin-orbit coupling (SOC). We show that this strongly depends on orientation in-plane field. In presence field, SDE. Simulation and measurement supercurrent suggest...

Clean experimental testing grounds for strongly interacting electrons confined to one dimension are hard find. Thus, suspended carbon nanotubes (CNTs) a unique model system. Previous work showed that electron transport in metallic CNTs can be frozen by strong electron-electron interactions. However, detailed understanding of this exotic insulating phase has remained elusive. Here, the authors characterize energy gap associated with nominally CNTs, and compare precise measurements CNT...

First-principles density functional calculations were performed for magnetic properties of wurtzite ZnO(1-x)Xx (X = S, Se, and Te) alloys in the presence Zn cation vacancies a low concentration group-VI dopants framework local spin approximation (LSDA) LSDA+U method. The positions Zn-3d states are misplaced LSDA approach these approximately corrected We demonstrate that state with native point defect is mainly localized at vacancy. substitution oxygen atoms around vacancy by chalcogens X...

Electronic compressibility, the second derivative of ground-state energy with respect to total electron number, is a measurable quantity that reveals interaction strength system and can be used characterize orderly crystalline lattice electrons known as Wigner crystal. Here, we measure electronic compressibility individual suspended ultraclean carbon nanotubes in low-density crystal regime. Using low-temperature quantum transport measurements, determine function carrier number varying band...

Electronic analogs of optical interferences are powerful tools to investigate quantum phenomena in condensed matter. In carbon nanotubes (CNTs), it is well established that an electronic Fabry-Perot interferometer can be realized. Other types should also arise CNTs, but have proven challenging realize. particular, CNTs been identified as a system realize the analog Sagnac interferometer---the most sensitive interferometer. To this effect, interference between nonidentical transmission...

Transparent contact interfaces in superconductor–graphene hybrid systems are critical for realizing superconducting quantum applications. Here, we examine the effect of edge fabrication process on transparency aluminum–graphene junction. We show significant improvement our junctions by promoting chemical component etch process. Our results compare favorably with state-of-the-art graphene Josephson junctions. The findings study contribute to advancing knowledge edge-contacted

Metal–Organic Frameworks The thermoelectric properties of a highly electrically conductive metal-organic framework, copper benzenehexathiol, are probed experimentally, utilizing mesoscopic-scale devices fabricated on thin film samples. Our measurements show that the phonon mean free path is very small and dictated by intrinsic nanoporous structure while electrical conductivity affected presence polycrystalline domains. More details can be found in article number 2000437 Janis Louie, Vikram...

Commensurability phenomena abound in nature and are typically associated with mismatched lengths, as can occur quasiperiodic systems. However, not all commensuration effects spatial nature. In finite-sized Dirac systems, an intriguing example arises tilted or warped cones wherein the degeneracy speed of right- left-moving electrons within a given cone valley is lifted. Bound states be purely fast-moving slow-moving, giving rise to incommensurate energy level spacings Vernier spectrum. this...

Electronic analogues of optical interferences have been used to investigate quantum phenomena in condensed matter. However, the most sensitive, Sagnac interference, has not realized electronic domain. We report interference using ultraclean carbon nanotubes. show that manifests as conductance oscillations versus gate voltage. Compared Fabry-Perot oscillations, a larger period and are more robust temperature. Using nanotubes known structure, we probe nanotube chirality transport measurement....

We investigate the effects of an in-plane magnetic field on weak antilocalization signature near-surface quantum wells lacking bulk and inversion symmetry. The measured magnetoconductivity exhibits a strong anisotropy with respect to direction field. two-fold symmetry observed magneto-anisotropy originates from competition between Rashba Dresselhaus spin-orbit couplings. high sensitivity spin texture produced by combined Zeeman fields results in very large ratios, reaching 100%. Using...

In the presence of a 4$π$-periodic contribution to current phase relation, for example in topological Josephson junctions, odd Shapiro steps are expected be missing. While missing have been observed several material systems and interpreted context superconductivity, they also topologically trivial junctions. Here, we study evolution such Al-InAs junctions an in-plane magnetic field $B^θ$. We find that reappear at crossover $B^θ$ value, exhibiting angle anisotropy depends on spin-orbit...

Commensurability phenomena abound in nature and are typically associated with mismatched lengths, as can occur quasiperiodic systems. However, not all commensuration effects spatial nature. In finite-sized Dirac systems, an intriguing example arises tilted or warped cones wherein the degeneracy speed of right- left-moving electrons within a given cone valley is lifted. Bound states be purely fast-moving slow-moving, giving rise to incommensurate energy level spacings vernier spectrum. this...