Article
Materials Science, Multidisciplinary
Anqi Zhang, Daheng Liu, Teng Yang, Song Ma, Zhidong Zhang
Summary: This study investigates the magnetoelectrical transport properties of SnTe thin films grown on ferrimagnetic insulators Eu3Fe5O12 and Y3Fe5O12 single-crystal underlayers. Linear magnetic resistance is observed in SnTe/EuIG heterostructures, while SnTe/YIG heterostructures exhibit weak antilocalization characteristics. The presence of double carrier characteristic and disordered domain distribution in SnTe/EuIG is attributed to the topological surface Dirac electrons. This research provides insights into the transport mechanism of topological crystalline insulator and magnetite insulator heterostructures, and demonstrates the potential application of tunable topological electronic devices.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Wei-Jhih Zou, Meng-Xin Guo, Jyun-Fong Wong, Zih-Ping Huang, Jui-Min Chia, Wei-Nien Chen, Sheng-Xin Wang, Keng-Yung Lin, Lawrence Boyu Young, Yen-Hsun Glen Lin, Mohammad Yahyavi, Chien-Ting Wu, Horng-Tay Jeng, Shang-Fan Lee, Tay-Rong Chang, Minghwei Hong, Jueinai Kwo
Summary: The quantum anomalous Hall effect has been realized at elevated temperatures in topological insulator-based heterostructures using the approach of magnetic proximity effect. Large anomalous Hall resistance has been achieved through interface tuning, and coexistence of topological Hall effect-like feature with the anomalous Hall effect has been observed.
Article
Chemistry, Physical
Gyanendra K. Maurya, Faizan Ahmad, Surendra Kumar, Vidushi Gautam, Kavindra Kandpal, Akhilesh Tiwari, Pramod Kumar
Summary: By integrating Bi2Te2Se with Si to form a heterojunction, the study investigated the transport properties and photoelectric performance of the resulting device. The n-Bi2Te2Se/p-Si heterojunction diode exhibited excellent photodetection capabilities in the visible to near-infrared range, with optimal performance at a 900 nm wavelength.
APPLIED SURFACE SCIENCE
(2021)
Article
Physics, Multidisciplinary
Ashley M. Cook, Joel E. Moore
Summary: This article uncovers a new class of multiplicative topological phases using symmetry, which have nontrivial topological properties and can carry current at the edges of the sample. Considerable understanding of these phases has been gained recently by considering additional protecting symmetries, different types of quasiparticles, and systems out of equilibrium. The authors construct a large class of previously unidentified multiplicative topological phases characterized by tensor product Hilbert spaces, and demonstrate their methods by introducing multiplicative topological phases based on Hopf and Chern insulator phases.
COMMUNICATIONS PHYSICS
(2022)
Article
Chemistry, Physical
Ruihong Li, Guangtao Liu, Qiang Jing, Xianyu Wang, Hongbo Wang, Jian Zhang, Yanmei Ma
Summary: This study investigates the properties of topological insulator SnBi2Te4 under high pressures through structural and electrical transport investigations. The research reveals structural phase transformations and modifications of the electronic band structure under high pressures. Three pressure induced superconducting states are observed. This study provides insights into the effects of pressure on the properties of topological phase materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Toshihiro Sato, Martin Hohenadler, Tarun Grover, John McGreevy, Fakher F. Assaad
Summary: （English Summary:）
In the system of Dirac fermions in (2 + 1) dimensions with dynamically generated anticommuting SO(3) antiferromagnetic and Z(2) Kekule valence-bond solid (KVBS) masses, there exists a field theory with a topological theta term that allows for continuous phase transitions. The presence of topological defects and the theta term play crucial roles in the transition process in this system.
Article
Chemistry, Multidisciplinary
Alexandra V. Galeeva, Dmitry A. Belov, Aleksei S. Kazakov, Anton V. Ikonnikov, Alexey I. Artamkin, Ludmila I. Ryabova, Valentine V. Volobuev, Gunther Springholz, Sergey N. Danilov, Dmitry R. Khokhlov
Summary: The study reveals that in Pb1-xSnxTe films with the composition range of x = (0.11-0.44) and (111) surface crystallographic orientation, a photoelectromagnetic effect is induced by laser terahertz radiation. The amplitude of the effect is determined by different factors in the trivial phase and the topological phase, with potential mechanisms involving the thermalization rate of photoexcited electrons.
Article
Multidisciplinary Sciences
Yuqi Liu, Weidong Cao, Weijian Chen, Hua Wang, Lan Yang, Xuan Zhang
Summary: Topological insulators (TIs) have been widely studied in photonics and acoustics due to their unique physical properties and potential applications. This article explores TIs on an integrated circuit (IC) platform and designs a fully integrated topological circuit chain. Through comprehensive post-layout simulations, the researchers observe and evaluate the characteristics of the topological circuit. The results demonstrate the feasibility and promise of large-scale topological electronics research with IC technology.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Multidisciplinary
Hao-Ke Xu, Mingqiang Gu, Fucong Fei, Yi-Sheng Gu, Dang Liu, Qiao-Yan Yu, Sha-Sha Xue, Xu-Hui Ning, Bo Chen, Hangkai Xie, Zhen Zhu, Dandan Guan, Shiyong Wang, Yaoyi Li, Canhua Liu, Qihang Liu, Fengqi Song, Hao Zheng, Jinfeng Jia
Summary: Research has discovered that MnBi4Te7 is a topological insulator with quantum anomalous Hall effect and axion insulator phase. Through scanning tunneling spectroscopy, it has been observed that there is an electronic state at the edge of the magnetic MnBi2Te4 layer at 4.5 K, but not in the nonmagnetic Bi2Te3 layer. As the temperature increases, the edge state disappears, while the state induced by point defects persists.
Article
Multidisciplinary Sciences
Zhe Zhang, Pierre Delplace, Romain Fleury
Summary: Topological systems exhibit robustness against disorder and defects, with Chern insulators being the most reliable design currently. However, an anomalous non-reciprocal topological network has been identified to have superior robustness to edge transmission under arbitrarily large disorder levels. This discovery paves the way for efficient planar energy transport on 2D substrates with full protection against large fabrication flaws.
Article
Optics
Kai-Ye Shi, Rui-Qi Chen, Shuaining Zhang, Wei Zhang
Summary: In this paper, a scheme is proposed to fully characterize Floquet topological phases using bulk dispersions and a set of topological invariants associated with the band-touching points.
Article
Engineering, Electrical & Electronic
Lingjie Du, Jianmin Zheng, Yang-Zhi Chou, Jie Zhang, Xingjun Wu, Gerard Sullivan, Amal Ikhlassi, Rui-Rui Du
Summary: Measurements of one-dimensional Coulomb drag between adjacent edge states of quantum spin Hall insulators suggest that QSH effects could be used to suppress the impact of Coulomb interactions on future nanocircuit performance. However, challenges remain in understanding and controlling the competing drag mechanisms at higher temperatures.
NATURE ELECTRONICS
(2021)
Article
Multidisciplinary Sciences
Yuejie Zhang, Vijaysankar Kalappattil, Chuanpu Liu, M. Mehraeen, Steven S-L Zhang, Jinjun Ding, Uppalaiah Erugu, Zhijie Chen, Jifa Tian, Kai Liu, Jinke Tang, Mingzhong Wu
Summary: The spin-momentum locking in topological materials can generate a bilinear magnetoelectric resistance (BMER) effect, which has potential applications in information reading and field sensing. This article reports the first observation of BMER effects in topological Dirac semimetals, with significantly stronger responses measured at room temperature. The experiments were conducted using alpha-Sn thin films grown on silicon substrates, which showed BMER responses 10^6 times larger than previously measured at room temperature.
Article
Physics, Multidisciplinary
Chang-An Li, Song-Bo Zhang, Jian Li, Bjoern Trauzettel
Summary: The article introduces a three-dimensional interferometer based on second-order topological insulators, which can control the interference pattern of the conductance by changing the direction of the magnetic field, showing a characteristic beating pattern with multiple frequencies.
PHYSICAL REVIEW LETTERS
(2021)
Article
Multidisciplinary Sciences
Rui Wang, Tigran A. Sedrakyan, Baigeng Wang, Lingjie Du, Rui-Rui Du
Summary: Correlation and frustration are important in physics, leading to new quantum phases. In this study, we observe the moat-band phenomena in shallowly inverted InAs/GaSb quantum wells, where we find an unconventional time-reversal-symmetry breaking excitonic ground state. We demonstrate the evolution from helical-like to chiral-like edge transport and explain our experimental observations using a moat band for excitons that results from density imbalance.
Article
Orthopedics
Soichiro Masuda, Toshiki Fukasawa, Masato Takeuchi, Shunsuke Fujibayashi, Bungo Otsuki, Koichi Murata, Takayoshi Shimizu, Shuichi Matsuda, Koji Kawakami
Summary: The reoperation rate is higher after microendoscopic discectomy for lumbar disc herniation compared to traditional microdiscectomy or open discectomy at a median follow-up of 4 years. Surgeons should therefore choose microdiscectomy or open discectomy instead of microendoscopic discectomy.
CLINICAL ORTHOPAEDICS AND RELATED RESEARCH
(2023)
Article
Orthopedics
Toshihiro Mitsui, Takayoshi Shimizu, Shunsuke Fujibayashi, Bungo Otsuki, Koichi Murata, Shuichi Matsuda
Summary: This study aimed to identify factors predicting the need for rib resection in upper lumbar interbody fusion surgery. It was found that 79% of patients who underwent a two-level procedure required rib resection, while 81.6% of patients who had a single-level procedure did not. Multivariate logistic regression analysis identified the following independent predictors for rib resection: L1-2 procedure, T10-L2 kyphosis > 15.9°, and apex of the coronal curve above L2. Therefore, rib resection should be expected in upper lumbar interbody fusion surgery.
JOURNAL OF ORTHOPAEDIC SCIENCE
(2023)
Review
Orthopedics
Shintaro Honda, Shunsuke Fujibayashi, Eijiro Onishi, Seiichi Odate, Yasuyuki Tamaki, Takuya Tomizawa, Takayoshi Shimizu, Koichi Murata, Bungo Otsuki, Shuichi Matsuda
Summary: This study identifies the characteristics and outcomes of surgically confirmed acute non-traumatic spinal subarachnoid hematomas. Most patients were middle-aged and complained of back pain, with the hematoma located in the thoracic spine. After surgery, 70% of the patients showed improvement in neurological symptoms.
JOURNAL OF ORTHOPAEDIC SCIENCE
(2023)
Article
Rheumatology
Kosuke Ebina, Toru Hirano, Yuichi Maeda, Yasutaka Okita, Yuki Etani, Makoto Hirao, Wataru Yamamoto, Motomu Hashimoto, Koichi Murata, Akira Onishi, Sadao Jinno, Ryota Hara, Yonsu Son, Hideki Amuro, Takuya Kotani, Hideyuki Shiba, Masaki Katayama, Keiichi Yamamoto, Atsushi Kumanogoh, Seiji Okada, Ken Nakata
Summary: This study evaluated the effectiveness of adding methotrexate (MTX) or iguratimod (IGU) in patients with rheumatoid arthritis who had an inadequate response to Janus kinase inhibitors (JAKis). The results showed that adding MTX or IGU significantly improved clinical disease activity scores and disease activity index, suggesting that it can be considered as a complementary treatment.
MODERN RHEUMATOLOGY
(2023)
Article
Engineering, Environmental
Tofik Ahmed Shifa, Alessandro Gradone, Khabib Yusupov, Kassa Belay Ibrahim, Matteo Jugovac, Polina Makarovna Sheverdyaeva, Johanna Rosen, Vittorio Morandi, Paolo Moras, Alberto Vomiero
Summary: In this study, a highly efficient catalyst for the oxygen evolution reaction (OER) was developed using a CrOx-CuS heterostructure, which exhibited a low over potential and long-term durability.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Wenxiong Zhang, Eiji Hosono, Daisuke Asakura, Shingo Tanaka, Masaki Kobayashi, Naoka Nagamura, Masaharu Oshima, Jun Miyawaki, Hisao Kiuchi, Yoshihisa Harada
Summary: This study used microscopic resonant photoelectron spectroscopy to reveal the electronic structure differences of different crystal facets in LiCoO2 cathode particles, finding that the (012) facet is more reactive compared to other facets.
Article
Chemistry, Multidisciplinary
Letizia Liccardo, Matteo Bordin, Polina M. Sheverdyaeva, Matteo Belli, Paolo Moras, Alberto Vomiero, Elisa Moretti
Summary: Defect-engineered nanostructured TiO2 photocatalysts were obtained by hydrogenation strategy to extend its light absorption into the near-infrared region. The hydrogenation process enhanced the photocatalytic activity and resulted in significant degradation of organic pollutants.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Valeria Milotti, Stefania Cacovich, Davide Raffaele Ceratti, Daniel Ory, Jessica Barichello, Fabio Matteocci, Aldo Di Carlo, Polina M. Sheverdyaeva, Philip Schulz, Paolo Moras
Summary: This study tracks the evolution of the chemical and optoelectronic properties of FAPbBr(3) films under soft X-ray irradiation using photoemission spectroscopy and micro-photoluminescence. Two contrasting processes are observed during irradiation: material degradation and self-healing. The degradation is characterized by the formation of Pb-0 metallic clusters, loss of gaseous Br-2, and decrease and shift of the photoluminescence emission. The recovery of the photoluminescence signal is attributed to self-healing through the re-oxidation of Pb-0 and migration of FA(+) and Br- ions. This degradation/self-healing effect has the potential to extend the lifetime of perovskite-based X-ray detectors.
Article
Materials Science, Multidisciplinary
Turgut Yilmaz, Xuance Jiang, Deyu Lu, Polina M. Sheverdyaeva, Andrey V. Matetskiy, Paolo Moras, Federico Mazzola, Ivana Vobornik, Jun Fujii, Kenneth Evans-Lutterodt, Elio Vescovo
Summary: Transition metal dichalcogenides host interesting electronic order states intertwined with non-trivial band topology. Photoemission experiments on 1T-VSe2 reveal a Dirac nodal arc emerging from band inversion, supporting spin-momentum locked topological surface states. The combination of these properties with a non-trivial band topology opens the possibility of additional exotic states.
COMMUNICATIONS MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Polina M. Sheverdyaeva, Conor Hogan, Gustav Bihlmayer, Jun Fujii, Ivana Vobornik, Matteo Jugovac, Asish K. Kundu, Sandra Gardonio, Zipporah Rini Benher, Giovanni Di Santo, Sara Gonzalez, Luca Petaccia, Carlo Carbone, Paolo Moras
Summary: Topological insulators are bulk insulators with metallic and fully spin-polarized surface states exhibiting Dirac-like band dispersion. By using spin-resolved photoemission spectroscopy, we show that the topological surface states of a topological insulator interfaced with an antimonene bilayer exhibit nearly full out-of-plane spin polarization within the substrate gap. This phenomenon is connected to a symmetry-protected band crossing of the spin-polarized surface states. The nearly full out-of-plane spin polarization of the topological surface states occurs along a continuous path in the energy-momentum space, and the spin polarization within the gap can be reversibly tuned from nearly full out-of-plane to nearly full in-plane by electron doping. These findings pave the way for advanced spintronics applications that exploit the giant out-of-plane spin polarization of topological surface states.
Article
Energy & Fuels
Julien Dangbegnon, Nadia Garino, Matteo Angelozzi, Marco Laurenti, Francesco Seller, Mara Serrapede, Pietro Zaccagnini, Paolo Moras, Matteo Cocuzza, Thierry Ouisse, Hanna Pazniak, Jesus Gonzalez-Julian, Polina M. Sheverdyaeva, Alessia Di Vito, Alessandro Pedico, Candido Fabrizio Pirri, Andrea Lamberti
Summary: We developed a novel fiber-shaped supercapacitor by using electrophoretically deposited Ti3C2Tx MXenens and microwave-assisted nitrogen-doped carbon nanotube yarns as electrodes. With a polyvinylidene difluoride (PVDF) membrane coating, short-circuit issues were completely prevented during cell assembly. The assembled cell demonstrated a large operating voltage window, excellent stability, and high energy density, making it a promising flexible wired-shaped energy storage unit for wearable devices.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Rheumatology
Akio Umemoto, Takeshi Kuwada, Koichi Murata, Masahiro Shiokawa, Sakiko Ota, Yoshiki Murotani, Akihiro Itamoto, Kohei Nishitani, Hiroyuki Yoshitomi, Takayuki Fujii, Akira Onishi, Hideo Onizawa, Kosaku Murakami, Masao Tanaka, Hiromu Ito, Hiroshi Seno, Akio Morinobu, Shuichi Matsuda
Summary: This study investigated the role of anti-citrullinated osteopontin (anti-cit-OPN) antibodies in the pathogenesis of rheumatoid arthritis (RA). The results showed that approximately 44% of RA patients had anti-cit-OPN antibodies, which aggravated RA and decreased the survival rate of TNF inhibitors.
ARTHRITIS RESEARCH & THERAPY
(2023)
Article
Nanoscience & Nanotechnology
Sherif Kamal, Insung Seo, Pantelis Bampoulis, Matteo Jugovac, Carlo Alberto Brondin, Tevfik Onur Mentes, Iva Scaric Jankovic, Andrey V. Matetskiy, Paolo Moras, Polina M. Sheverdyaeva, Thomas Michely, Yoshihiro Gohda, Andrea Locatelli, Marko Kralj, Marin Petrovic
Summary: This study investigates the electronic characteristics of a high-coverage, single-layer borophene on the Ir(111) substrate using photoemission spectroscopies, scanning probe techniques, and theoretical calculations. The results show that the binding of borophene to Ir(111) exhibits one-dimensional modulation and transforms borophene into a nanograting. The binding modulation also affects the chemical reactivity and aging effect of borophene.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Christoph Emeis, Sanjoy Kr Mahatha, Sebastian Rohlf, Kai Rossnagel, Fabio Caruso
Summary: This study combines ab initio calculations and ARPES to investigate the electron-plasmon interaction in highly doped semiconducting 1T-HfS2. Experimental results reveal the emergence of satellite spectral features near quasiparticle excitations, indicating coupling to bosonic excitations. First-principles calculations demonstrate that these features can be attributed to electronic coupling to carrier plasmons. Additionally, reduced screening at the surface enhances the electron-plasmon interaction and leads to the formation of plasmonic polarons.
Article
Chemistry, Multidisciplinary
Andrey V. Matetskiy, Valeria Milotti, Polina M. Sheverdyaeva, Paolo Moras, Carlo Carbone, Alexey N. Mihalyuk
Summary: Dimensionality strongly affects the magnetic structure of solid systems. In this study, the antiferromagnetic ground state of ultrathin gadolinium germanide metalloxene films was theoretically predicted and experimentally confirmed. Calculations and experiments revealed the magnetic properties and band splitting in ultrathin GdGe2 films and compared them with other metalloxene films.
