Current Issue

2022, Volume 1,  Issue 4

Phase-change materials that exploit phase transitions between the crystalline and amorphous states are a leading candidate for nonvolatile memory applications. This work reports a conductive-bridge phase-change scheme utilizing a self-decomposed alloy, which drastically reduces the programming energy to femtojoule-level. Specifically, incorporating suitable amount of oxygen into germanium antimonites leads to the formation of a heterogeneous network with intermixed germanium dioxide glass domains and antimony-rich crystalline domains, allowing the formation of a conductive path under external electrical stimulus. Hence, device programming can already be achieved by forming and breaking the nano-bridges, enabling low-power data storage. 

The moderate on-site Coulomb repulsion U and SOC strength of Rh-4d electrons endow them with variable, intriguing natures, and this offers a rich platform for materials design. This work reports a new ternary rhodium-containing compound La2Rh3+δSb4 (δ≈1/8) that becomes a type-II superconductor at low temperature. The magic number δ ≈ 1/8 is reminiscent of the stripe phase observed in the high-Tc cuprates whose origin remains unclear. More importantly, this work also suggests that the broad family of Ln2Tm3+δSb4 (Ln = rare earth, Tm = transition metals)-whose physical properties are not yet well explored-likely hosts new quantum material bases where novel SC, quantum magnetism, quantum criticality and other electronic correlation effects can be found.

Editorial
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Advanced scanning probe techniques and materials research
Topical Review
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Exciton dynamics in 2D organic semiconductors
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Microstructure and long-term stability of Ni–YSZ anode supported fuel cells: a review
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Bilayer metal halide perovskite for efficient and stable solar cells and modules
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Ion transport and structural design of lithium-ion conductive solid polymer electrolytes: a perspective
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Self-assembled supramolecular materials for photocatalytic H2 production and CO2 reduction
Paper
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Defect passivation and electrical conductivity enhancement in perovskite solar cells using functionalized graphene quantum dots
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Facile molten salt synthesis of carbon-anchored TiN nanoparticles for durable high-rate lithium-ion battery anodes
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Reinforced cathode-garnet interface for high-capacity all-solid-state batteries
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La2Rh3+δSb4: A new ternary superconducting rhodium-antimonide
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Efficient emission of quasi-two-dimensional perovskite films cast by inkjet printing for pixeldefined matrix light-emitting diodes
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Tailoring the oxygen concentration in Ge-Sb-O alloys to enable femtojoule-level phase-change memory operations