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The nature of the pairing symmetry in superconducting single-layer FeSe has been the subject of intense debate. Here, the authors use scanning tunneling microscopy/spectroscopy to show the absence of topological edge/corner modes, providing evidence for sign-preserving s-wave pairing.

The exact mechanism for superconductivity in iron-based superconductors remains elusive, but is thought to involve complex interactions between many orbitals. Using angle-resolved photoelectron spectroscopy, Liuet al. report the electronic structure of the single-layer parent compound FeSe.

Unlike the other iron-based superconductors, the parent compounds of the alkaline iron selenide superconductors are insulators. Dai and colleagues examine the spin-wave excitations in these materials and uncover evidence for a common magnetic origin for all iron-based superconductors.

The evolution of superconductivity in LiFeAs with respect to pressure or strain remains elusive. Here, the authors observe different response of superconducting states due to different orientations of local wrinkles on the surface of LiFeAs.

Spur-type of growth is preferred for apple production. Here, the authors employ the trio-based phasing approach to assemble a fully phased Fuji genome and reveal the association of a 167-bp deletion in the promoter region of the MdTCP11 gene with the spur-type varieties.

Iron pnictide superconductors represent a suggestive alternative to cuprate superconductors for achieving high transition temperatures. Using in situ angle-resolved photoemission spectroscopy, the electronic properties of FeSe are examined as a function of film thickness, providing valuable insights into the mechanism driving the superconductivity in this material.

The authors show that SARS-CoV-2-specific T cells in the lung are key to fighting infection and persist after viral clearance, contributing to long-term immunity and protection.

Bulk high-temperature superconductivity observed in pressurized tetragonal La₂PrNi₂O₇ was testified by detecting clear diamagnetic signals below about 75 K with appreciable superconducting shielding volume fractions at a pressure of above 15 GPa.

Based on comparative single-cell transcriptomics of arterial grafts deriving from internal thoracic, radial and right gastroepiploic arteries, Hu, Dai, Chang, et al. identify factors that might prevent extracellular matrix deposition and fibrosis and improve the outcomes of coronary artery bypass grafting.

The role of PHD finger protein 8 (PHF8) in anti-tumour immunity remains to be investigated. Here, the authors suggest PHF8 as an epigenetic checkpoint and show that targeting PHF8 induces a viral mimicry response enhancing anti-tumour immunity in colorectal cancer.

It was recently found that a certain nickelate compound, La₃Ni₂O₇, at moderately high pressures has a superconducting phase that persists to above liquid nitrogen temperatures. Here, by studying the parent phase at ambient pressure, Chen et al uncover rich magnetic properties and show the vital role of the strong bonding of the inter-layer Ni orbitals in the magnetic and electronic excitations.

Applications of edge states are rare. Here the authors utilize asymmetric edge states in the topological material Ta₂Pd₃Te₅ to achieve the interfering Josephson diode effect, exhibiting high efficiency with ultra-low switching power at very small magnetic fields.

The origin of nematicity in kagome superconductors has been hard to explain due to other entangled phases. Now, the role of orbital hybridization and coupling is revealed to induce electronic nematicity in the kagome superconductor RbTi₃Bi₅.

Topological superconductors are highly sought-after systems with potential applications in topological quantum computing. Here, the authors propose a scheme for realizing topological superconductivity based on the bulk energy bands and conventional superconductivity.

TGR5 activation improves myocardial lipid accumulation and cardiac dysfunction in diabetic mice, offering promise for managing diabetic cardiomyopathy.

Glass sulfide electrolytes are promising materials for solid-state Li metal batteries, yet limited understanding hinders their progress. Here, the authors decipher the dissolution process of halogen dopants in glass and introduce a synthetic strategy to increase halogen dopant’s dissolution capacity.

Mutations in ARMC5 are associated with risk of primary macronodular adrenal gland hyperplasia. Here the authors show that mice lacking Armc5 have adrenal gland hyperplasia and defective T-cell proliferation, differentiation, survival andin vivoT-cell-mediated immune responses.

Low-k nanodiamonds are discovered to possess the ability to concurrently enhance the electrocaloric effect, thermal conductivity, and electrical stability of polymeric nanocomposites, providing support for electrocaloric refrigeration.

Nickelates have been shown to host unconventional superconductivity, and recently it has been found that the choice of substrate can significantly change the superconducting critical temperature. This suggests, that like some Cuprates, strain could be important. Here Gao, Fan, Wang, and coauthors find that magnetic excitations in a parent Nickelate are insensitive to substrate choice, and therefore strain, which differs markedly from the case of Cuprates.

Observation of a high-pressure insulating state in cuprate superconductors provides a fresh challenge for understanding the mechanism of superconductivity in these materials.

It is likely that antiferromagnetism has a role in the superconductivity of iron arsenide. But is the magnetism local, as described by the Heisenberg model, or itinerant, which is more in agreement with the Stoner model? The answer is both.

The authors report that with the use of angle-resolved photoemission spectroscopy, nodeless electron pairing in CsV₃Sb₅-derived kagome superconductors can be observed directly.

Ding Ma, Xing Xie, Yongyong Shi and colleagues report a genome-wide association study of cervical cancer in the Han Chinese population. They identify two new susceptibility lociat 4q12 and 17q12.

The kagome superconductor CsV₃Sb₅ exhibits a charge density wave (CDW) as well as superconductivity (SC). Here, the authors find that the CDW transition temperature decreases with decreasing sample thickness to 72 K at 27 atomic layers, but then unexpectedly increases to 120 K at 5 layers, an opposite trend to SC.

Many mechanistic aspects that govern the non-reciprocal transport properties of the superconducting diode effect (SDE) are still unresolved, particularly the role of vortices. Here, the authors investigate the SDE in the chiral type-I superconductor, NbGe₂, showing that the vortex dynamics play a significant role in the observed transport properties.

Superconductivity can emerge from a strange-metal state, but the exact relationship between them is unknown. Now, quantitative measurements reveal the dependence of resistivity in the strange metal on the superconducting transition temperature.

Precise quantitative scaling laws are observed between the normalized T-linear coefficient and T_c among copper oxides, pnictides and a class of organic superconductors, suggesting a common underlying physics at work in these unconventional superconductors.

The impact of the charge density wave (CDW) state to the electronic structure in the Kagome superconductors AV₃Sb₅ remains unclear. Here, the authors observe CDW-induced Fermi surface reconstruction with a strongly anisotropic CDW gap and signatures of the electron-phonon coupling for all V-derived bands.

The diode is a well-known component of semiconductor electronics, but equivalent behaviour in superconductors is rare. Now, two demonstrations of a superconducting diode effect show that this is possible, through different mechanisms.

Multiple different types of topological states are observed in iron-based high-temperature superconductors. This suggests that these may be a good place to try and engineer high-temperature topological superconductivity.

Wang, Yu, Zhou, Song et al. profile cardiomyocytes and neighbouring cells from healthy adults and patients with heart failure and in recovery, and delineate their cellular compositions and interaction networks.

The recent discovery of superconductivity in bilayer nickelates under high pressure offers a new material platform to explore high-temperature superconductivity. In this study, the authors identify the electronic ground states of the La₃Ni₂O₇ film at ambient pressure revealing the critical role of ligand oxygen and the existence of long-range spin ordering along with charge-like anisotropy.

The discovery of superconductivity in doped NdNiO₂ has generated excitement due to similarities with cuprates. Here, the authors use first-principles calculations to show that different from cuprates, a hybridization between Ni d-orbitals and itinerant electrons in NdNiO₂ disfavours magnetism by screening Ni moment, as in Kondo systems.

The magnetic states found in iron-based superconductors are more complex than originally thought. This Review argues that the magnetism arises from both itinerant and localized electrons.

The recent discovery of superconductivity in the nickelates provides another angle to investigate this phenomenon in the high-T_c cuprates and hopefully help solve the mechanism of their unconventional superconductivity. Here, the authors report an increase in T_c for Pr_0.8Sr_0.2NiO₂ where strain from the underlying LSAT substrate plays a possible role, supporting simulations also reveal the contributing role Ni and O orbitals hybridisation play in the unconventional pairing.