Materials that possess nontrivial topology and magnetism is known to exhibit exotic quantum phenomena such as the quantum anomalous Hall effect. Here, we fabricate a novel magnetic topological heterostructure MnBiTe/BiTe where multiple magnetic layers are inserted into the topmost quintuple layer of the original topological insulator BiTe. A massive Dirac cone (DC) with a gap of 40-75 meV at 16 K is observed. By tracing the temperature evolution, this gap is shown to gradually decrease with increasing temperature and a blunt transition from a massive to a massless DC occurs around 200-250 K. Structural analysis shows that the samples also contain MnBiTe/BiTe. Magnetic measurements show that there are two distinct Mn components in the system that corresponds to the two heterostructures; MnBiTe/BiTe is paramagnetic at 6 K while MnBiTe/BiTe is ferromagnetic with a negative hysteresis (critical temperature ~20 K). This novel heterostructure is potentially important for future device applications.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7515900 | PMC |
| http://dx.doi.org/10.1038/s41467-020-18645-9 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
DNAzyme assisted single amplification for FEN1 activity detection using a personal glucose meter.
Anal Chim Acta
January 2025
MOE Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, 350116, PR China. Electronic address:
Flap endonuclease 1 (FEN1) plays a vital role in cancer by modulating DNA repair mechanisms, inducing genomic instability, and serving as a promising biomarker for cancer diagnosis and prognosis. In this work, we present the development of a novel DNAzyme signal amplification-directed point-of-care sensing system (Dz-PGM) for the sensitive and specific detection of FEN1. The Dz-PGM system utilizes DNAzyme signal amplification in conjunction with a personal glucose meter (PGM) for reporting, capitalizing on a biochemical cascade initiated by FEN1 recognition.
View Article and Find Full Text PDFSevere hyperhomocysteinemia due to MTHFR deficiency caused by a new mutation: A case report and literature review.
Zhong Nan Da Xue Xue Bao Yi Xue Ban
August 2024
Department of Neurology, Second Xiangya Hospital, Central South University, Changsha 410011.
Methylenetetrahydrofolate reductase (MTHFR) deficiency is a rare autosomal recessive genetic disorder caused by mutations in the gene, leading to a variety of clinical manifestations. In October 2022, the Second Xiangya Hospital of Central South University admitted a 21-year-old male patient with neuropsychiatric disorders, presenting primarily with cognitive decline, limb tremors, abnormal mental and behavioral symptoms, seizures, and gait disturbances. These symptoms had gradually developed over 5 years, worsening significantly in the past year.
View Article and Find Full Text PDFDimeric guaianolide sesquiterpenoids from the flowers of Chrysanthemum indicum ameliorate hepatic steatosis through mitigating SIRT1-mediated lipid accumulation and ferroptosis.
J Adv Res
January 2025
State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Avenida da Universidade, Taipa, Macao 999078, China; Guangdong-Hong Kong-Macau Join Laboratory for Pharmacodynamic Constituents of TCM and New Drugs Research, University of Macau, Avenida da Universidade, Taipa, Macao 999078, China; Department of Pharmaceutical Sciences and Technology, Faculty of Health Sciences, University of Macau, Avenida de Universidade, Taipa, Macao 999078, China. Electronic address:
Introduction: Non-alcoholic fatty liver disease (NAFLD) acts as the primary contributor to non-alcoholic steatohepatitis, fibrosis, cirrhosis, and potentially hepatocellular carcinoma. The flowers of Chrysanthemum indicum, a traditional edible medicinal herb, have been widely used in China for more than 2000 years. However, the function of C.
View Article and Find Full Text PDFMitral valve prolapse in sudden cardiac arrest survivors - coincidence or causal relationship?
Heart Rhythm
January 2025
Department of Coronary Artery Disease and Cardiac Rehabilitation, National Institute of Cardiology, Warsaw, Poland.
Background: Sudden cardiac arrest (SCA) risk stratification in patients with mitral valve prolapse (MVP) may be complicated by other potential causes of arrhythmia.
Objectives: We aimed to characterize SCA survivors with isolated (iMVP) and non-isolated MVP (non-iMVP) and to assess their long-term follow-up.
Methods: This ambispective study included 75 patients with MVP who experienced SCA and were treated in our center between 2009-2024.
Cell-free transcription amplification-based split-type electrochemical sensor using enzyme-linked magnetic microbeads for minimal residual leukemia detection.
Talanta
January 2025
Department of Rehabilitation Medicine, School of Health, Fujian Medical University, Fuzhou, 350122, China; Department of Orthopaedics, Fujian Provincial Institute of Orthopaedics, The First Affiliated Hospital, Fujian Medical University, Fuzhou, 350005, China. Electronic address:
Constrained by detecting techniques, patients with acute promyelocytic leukemia (APL) are often confronted with minimal residual disease (MRD) and a high risk of relapse. Thus, a pragmatic and robust method for MRD monitoring is urgently needed. Herein, a novel split-type electrochemical sensor (E-sensor) was developed by integrating nucleic acid sequence-based amplification (NASBA) with enzyme-linked magnetic microbeads (MMBs) for ultra-sensitive detection of the PML/RARα transcript.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!