Giant Hall Switching by Surface-State-Mediated Spin-Orbit Torque in a Hard Ferromagnetic Topological Insulator.

Topological insulators (TI) and magnetic topological insulators (MTI) can apply highly efficient spin-orbit torque (SOT) and manipulate the magnetization with their unique topological surface states (TSS) with ultrahigh efficiency. Here, efficient SOT switching of a hard MTI, V-doped (Bi,Sb)Te (VBST), with a large coercive field that can prevent the influence of an external magnetic field, is demonstrated. A giant switched anomalous Hall resistance of 9.

Overcoming the challenge of potent endogenous interferences in limaprost quantification: An innovative methodology combining differential mobility spectrometry with LC-MS/MS for ultra-high sensitivity, selectivity and significantly enhanced throughput.

Limaprost, an orally administered analogue of prostaglandin E1, possesses potent vasodilatory, antiplatelet, and cytoprotective properties. Due to its extremely low therapeutic doses and exceedingly low plasma concentrations, the pharmacokinetic and bioequivalence studies of limaprost necessitate a highly sensitive quantitative method with a sub-pg/mL level of lower limit of quantification. Moreover, the intensity of endogenous interferences can even exceed the maximum concentration level of limaprost in human plasma, presenting further challenge to the quantification of limaprost.

Unveiling the Anomalous Hall Response of the Magnetic Structure Changes in the Epitaxial MnBiTe Films.

Recently discovered as an intrinsic antiferromagnetic topological insulator, MnBiTe has attracted tremendous research interest, as it provides an ideal platform to explore the interplay between topological and magnetic orders. MnBiTe displays distinct exotic topological phases that are inextricably linked to the different magnetic structures of the material. In this study, we conducted electrical transport measurements and systematically investigated the anomalous Hall response of epitaxial MnBiTe films when subjected to an external magnetic field sweep, revealing the different magnetic structures stemming from the interplay of applied fields and the material's intrinsic antiferromagnetic (AFM) ordering.

Regarding reference state to identify priority areas for ecological restoration in a karst region.

Widespread degradation of natural ecosystems around the globe has resulted in several ecological problems. Ecological restoration is considered a global priority as an important means of mitigating ecosystem degradation and enhancing ecosystem services provision. Regarding ecosystem reference state is a prerequisite for ecological restoration.

Manipulating Topological Phases in Magnetic Topological Insulators.

Magnetic topological insulators (MTIs) are a group of materials that feature topological band structures with concurrent magnetism, which can offer new opportunities for technological advancements in various applications, such as spintronics and quantum computing. The combination of topology and magnetism introduces a rich spectrum of topological phases in MTIs, which can be controllably manipulated by tuning material parameters such as doping profiles, interfacial proximity effect, or external conditions such as pressure and electric field. In this paper, we first review the mainstream MTI material platforms where the quantum anomalous Hall effect can be achieved, along with other exotic topological phases in MTIs.

Quantized resistance revealed at the criticality of the quantum anomalous Hall phase transitions.

In multilayered magnetic topological insulator structures, magnetization reversal processes can drive topological phase transitions between quantum anomalous Hall, axion insulator, and normal insulator states. Here we report an examination of the critical behavior of two such transitions: the quantum anomalous Hall to normal insulator (QAH-NI), and quantum anomalous Hall to axion insulator (QAH-AXI) transitions. By introducing a new analysis protocol wherein temperature dependent variations in the magnetic coercivity are accounted for, the critical behavior of the QAH-NI and QAH-AXI transitions are evaluated over a wide range of temperature and magnetic field.

Anomalous Landau quantization in intrinsic magnetic topological insulators.

The intrinsic magnetic topological insulator, Mn(BiSb)Te, has been identified as a Weyl semimetal with a single pair of Weyl nodes in its spin-aligned strong-field configuration. A direct consequence of the Weyl state is the layer dependent Chern number, [Formula: see text]. Previous reports in MnBiTe thin films have shown higher [Formula: see text] states either by increasing the film thickness or controlling the chemical potential.

Exchange-Biased Quantum Anomalous Hall Effect.

The quantum anomalous Hall (QAH) effect is characterized by a dissipationless chiral edge state with a quantized Hall resistance at zero magnetic field. Manipulating the QAH state is of great importance in both the understanding of topological quantum physics and the implementation of dissipationless electronics. Here, the QAH effect is realized in the magnetic topological insulator Cr-doped (Bi,Sb) Te (CBST) grown on an uncompensated antiferromagnetic insulator Al-doped Cr O .

Implementing microwave impedance microscopy in a dilution refrigerator.

We report the implementation of a dilution refrigerator-based scanning microwave impedance microscope with a base temperature of ∼100 mK. The vibration noise of our apparatus with tuning-fork feedback control is as low as 1 nm. Using this setup, we have demonstrated the imaging of quantum anomalous Hall states in magnetically (Cr and V) doped (Bi, Sb)2Te3 thin films grown on mica substrates.

Unidirectional Spin Hall Magnetoresistance in Antiferromagnetic Heterostructures.

Unidirectional spin Hall magnetoresistance (USMR) has been widely reported in the heavy metal/ferromagnet bilayer systems. We observe the USMR in Pt/α-Fe_{2}O_{3} bilayers where the α-Fe_{2}O_{3} is an antiferromagnetic (AFM) insulator. Systematic field and temperature dependent measurements confirm the magnonic origin of the USMR.

Electrical Manipulation of Topological Phases in a Quantum Anomalous Hall Insulator.

Quantum anomalous Hall phases arising from the inverted band topology in magnetically doped topological insulators have emerged as an important subject of research for quantization at zero magnetic fields. Though necessary for practical implementation, sophisticated electrical control of molecular beam epitaxy (MBE)-grown quantum anomalous Hall matter have been stymied by growth and fabrication challenges. Here, a novel procedure is demonstrated, employing a combination of thin-film deposition and 2D material stacking techniques, to create dual-gated devices of the MBE-grown quantum anomalous Hall insulator, Cr-doped (Bi,Sb) Te .

Assessing the Cultural Ecosystem Services Value of Protected Areas Considering Stakeholders' Preferences and Trade-Offs-Taking the Xin'an River Landscape Corridor Scenic Area as an Example.

Improving the accuracy of cultural ecosystem services (CESs) value assessment and paying more attention to the preferences and trade-offs of stakeholders in the administration of CESs are of vital importance for achieving resilient ecosystem management. Combining methodologies from sociology (Q method) and economics (choice experiment), an assessment framework of CESs is introduced to examine stakeholders' preferences and willingness to pay to participate in CESs in protected areas so as to explore how the value of CESs in protected areas can be optimized. The results show that the selection of CESs by stakeholders reflects certain synergies and trade-offs.

Emergent helical edge states in a hybridized three-dimensional topological insulator.

As the thickness of a three-dimensional (3D) topological insulator (TI) becomes comparable to the penetration depth of surface states, quantum tunneling between surfaces turns their gapless Dirac electronic structure into a gapped spectrum. Whether the surface hybridization gap can host topological edge states is still an open question. Herein, we provide transport evidence of 2D topological states in the quantum tunneling regime of a bulk insulating 3D TI BiSbTeSe.

Distinguishing the Two-Component Anomalous Hall Effect from the Topological Hall Effect.

In transport, the topological Hall effect (THE) presents itself as nonmonotonic features (or humps and dips) in the Hall signal and is widely interpreted as a sign of chiral spin textures, like magnetic skyrmions. However, when the anomalous Hall effect (AHE) is also present, the coexistence of two AHEs could give rise to similar artifacts, making it difficult to distinguish between genuine THE with AHE and two-component AHE. Here, we confirm genuine THE with AHE by means of transport and magneto-optical Kerr effect (MOKE) microscopy, in which magnetic skyrmions are directly observed, and find that genuine THE occurs in the transition region of the AHE.

An action recognition method for manual acupuncture techniques using a tactile array finger cot.

The current measurement systems for the physical parameters (rotation frequency, and amplitude) of Traditional Chinese Medicine (TCM) manual acupuncture tend to cause disturbance and inconvenience in clinical application and do not accurately capture the tactile signals from the physician's finger during manual acupuncture operations. In addition, the literature rarely discusses classification of the four basic manual acupuncture techniques (reinforcing by twirling and rotating (RFTR), reducing by twirling and rotating (RDTR), reinforcing by lifting and thrusting (RFLT), and reducing by lifting and thrusting (RDLT)). To address this problem, we developed a multi-PVDF film-based tactile array finger cot to collect piezoelectric signals from the acupuncturist's finger-needle contact during manual acupuncture operations.

Probing the mesoscopic size limit of quantum anomalous Hall insulators.

The inelastic scattering length (L) is a length scale of fundamental importance in condensed matters due to the relationship between inelastic scattering and quantum dephasing. In quantum anomalous Hall (QAH) materials, the mesoscopic length scale L plays an instrumental role in determining transport properties. Here we examine L in three regimes of the QAH system with distinct transport behaviors: the QAH, quantum critical, and insulating regimes.

Considering Farmers' Heterogeneity to Payment Ecosystem Services Participation: A Choice Experiment and Agent-Based Model Analysis in Xin'an River Basin, China.

The concept of watershed ecological compensation is one payment for ecosystem services (PES) program that incentivizes stakeholders undertake environmental conservation activities that improve the provision of ecosystem services. Defining the heterogeneity of farmers' willingness to participate in watershed ecological compensation is critically important for fully understanding stakeholders' demands. Accordingly, we designed a choice experiment survey to analyze the heterogeneity of policy preferences and willingness to receive compensation between upstream and midstream farmers in Xin'an River basin, China.

Mesoscopic Transport of Quantum Anomalous Hall Effect in the Submicron Size Regime.

The quantum anomalous Hall (QAH) effect has been demonstrated in two-dimensional topological insulator systems incorporated with ferromagnetism. However, a comprehensive understanding of mesoscopic transport in submicron QAH devices has not yet been established. Here we fabricated miniaturized QAH devices with channel widths down to 600 nm, where the QAH features are still preserved.

Dieffenbachia-Induced Transient Crystalline Keratopathy: A Case Report and Review of Previously Reported Cases.

We report a case of transient crystalline keratopathy induced by contact with plant sap and review previous reports on plant-induced crystalline keratopathy. A 27-year-old man with underlying diabetes mellitus presented with ocular pain, redness, and tearing after plant sap accidentally entered his right eye while he had been cutting the grass one day prior to presentation. The visual acuity of his right eye was 6/9.

Controlling Non-Grain Production Based on Cultivated Land Multifunction Assessment.

The control of non-grain production (NGP) has become a great challenge for cultivated land protection in China in recent years. A control method for NGP that can coordinate the conflicts between cultivated land protection and farmers' interest is urgently needed. Taking Tongxiang City as an example, this research proposed a solution for the control and management of NGP based on cultivated land multifunctional assessment.

Expression level of epithelial cell adhesion molecule (EpCAM) of circulating tumor cells (CTCs) of patients with NSCLC as an early indicator to monitor the effects of postoperative adjuvant chemotherapy.

Background: An early indicator for monitoring the effect of adjuvant treatment after lung cancer surgery is urgently needed. The study was to explore the effects of epithelial cell adhesion molecule (EpCAM) of circulating tumor cells (CTCs) in NSCLC patients with postoperative adjuvant chemotherapy.

Methods: Two drugs (platinum-containing chemotherapeutics + platinum-free chemotherapeutics) first-line chemotherapy regimen were given after surgery.

A multilayer affective computing model with evolutionary strategies reflecting decision-makers' preferences in process control.

Many industrial control problems related to multi-objective optimization, such as controller parameters tuning, often require operators to perform multiple-step interactions without considering the changes of decision-makers' affective states and quantitative description of decision-makers' preferences during the interactive decision. Regarding this problem, we developed a multilayer affective computing model (MACM), including three factors: human personality, emotional space, and affective states, to demonstrate the iterative affective computing during the interactions. First, a concise model of affective computing-driven interactive decision-making was built before three submodules involved were described in detail.