Article
Economics
Boru Ren, Brian Lucey
Summary: This paper investigates whether clean energy can serve as a safe haven for cryptocurrencies and analyzes their relationship. The results show that clean energy is not a direct hedge for cryptocurrencies, but it can act as a weak safe haven in extreme bearish markets. Additionally, clean energy is more likely to be a safe haven for dirty cryptocurrencies during periods of increased uncertainty.
Article
Physics, Condensed Matter
Surajit Dutta, Pratap Raychaudhuri, Sudhansu S. Mandal, T. Ramakrishnan
Summary: The highly convergent form of superfluid density in disordered conventional superconductors has been reformulated to separate out the 'dirty-limit' term and an additional term. It is shown that the commonly used term is not sufficient for analyzing experimental results. Therefore, theoretical predictions need to be confronted with experiment in a large regime of disordered superconductors.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Business, Finance
Boru Ren, Brian Lucey
Summary: In this paper, the herding behavior of two types of cryptocurrencies based on their energy usage levels is investigated. The empirical results reveal that herding is mainly observed in the dirty cryptocurrency market, especially in down markets. Moreover, clean cryptocurrencies also exhibit herding behavior with dirty cryptocurrencies when both markets are positive.
FINANCE RESEARCH LETTERS
(2022)
Article
Economics
Saqib Farid, Sitara Karim, Muhammad A. Naeem, Rabindra Nepal, Tooraj Jamasb
Summary: In the context of the recent covid-19 pandemic, there is a renewed interest in understanding the relationship between dirty and clean energies. This study examines the co-movement structure between clean energy stocks and dirty energies before and during the covid-19 outbreak using a large sample of dirty energies and clean energy sector proxies. The findings reveal weak linkages between clean energy equities and dirty energies in the short-run, but occasional high comovements in the long-run. There is also a distinct decoupling effect between dirty and clean energy markets, with clean energy being relatively isolated during the pandemic crisis.
Article
Green & Sustainable Science & Technology
Tedeschi Marco, Zouheir Mighri, Aviral Kumar Tiwari, Suleman Sarwar
Summary: This study analyzes the evolution of the return connectedness between cryptocurrencies and environmental market indexes in the last decade. It is the first to examine the link between clean and dirty cryptocurrencies and U.S. environmental stock market indexes in a time-frequency-quantile space. The findings suggest that these relationships are time-varying, and provide important implications for investors and policymakers.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Environmental Sciences
Abdollah Ah Mand, Abdul Ghafoor, Imtiaz Sifat
Summary: This paper examines the dynamic relationships among four key instruments in relation to clean and dirty energy assets: WTI futures, United States Oil Fund (USO), EnergySelect Sector SPDR Fund (XLE), and iShares Global Clean Energy ETF (ICLN). The econometric tests show a long-term relationship between all variables, and causality tests indicate that the clean energy ETF has a causal influence on most instruments. However, the economic interpretation of the causal patterns is not conclusive. Wavelet-based tests on a 1-minute interval transaction dataset reveal a convergence delay between WTI and XLE, and to a lesser extent, USO, but not ICLN, suggesting that clean energy has the potential to be a distinct asset class. The study also identifies the time scales at which arbitrage opportunities and liquidity movements occur: 32-256 and 4-8 minutes, respectively. These findings contribute to the limited literature on high-frequency dynamics in the clean and dirty energy markets.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Economics
Arshian Sharif, Mariem Brahim, Eyup Dogan, Panayiotis Tzeremes
Summary: This study examines the correlations and spillover relationships between green economy indices, black cryptocurrencies, and clean cryptocurrencies in the U.S., Euro, and Asian markets. The findings indicate that the linkage between green economy indices and clean cryptocurrencies is stronger than that between green economy indices and dirty cryptocurrencies. Additionally, clean cryptocurrencies show significant spillover effects during the COVID-19 pandemic, especially in Asia. These results are important for investors, regulators, policymakers, and cryptocurrency founders in their pursuit of financial integration and sustainable business development.
Article
Environmental Sciences
Tusawar Iftikhar Ahmad, Muhammad Atif Nawaz, Kokab Kiran, Vishal Dagar, Muhammad Azhar Bhatti, Altaf Hussain
Summary: Based on the study of Pakistan data, wood is the most commonly used fuel type in Pakistan, followed by natural gas and liquefied petroleum gas (LPG). The province of Balochistan is the most frequent user of wood and charcoal as fuel, while Punjab is the most frequent user of LPG, crop residues, and animal dung. The province of Sindh is the most frequent user of natural gas. Households with better wealth status, residing in urban areas, larger household sizes, and male household heads with higher educational status are more likely to use clean sources of fuel for cooking.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Economics
Aviral Kumar Tiwari, Nader Trabelsi, Emmanuel Joel Aikins Abakah, Samia Nasreen, Chien-Chiang Lee
Summary: This research examines the dynamic relationship between clean and dirty energy markets using empirical analysis. The findings show heterogeneous quantile dependence dynamics from clean energy markets to dirty energy markets. There is also positive and negative directional predictability between the two markets in different quantile ranges. Additionally, the study reveals that clean and dirty energy markets are marginally integrated at low frequencies, with dirty energy having predictive power over clean energy.
Article
Environmental Studies
Robert K. Perrons, Adam B. Jaffe, Trinh Le
Summary: Despite the urgent need for new energy technologies, the development process is slow, taking approximately 10 years to translate scientific knowledge into working prototypes. These findings will assist policymakers in devising more effective mechanisms and strategies to accelerate technological change in the energy sector.
ENERGY RESEARCH & SOCIAL SCIENCE
(2021)
Article
Business
Anna Milena Galazka, James Wallace
Summary: This study addresses the overlooked role of clients in dirty work and their contribution to workers' experience. Based on a review of 65 articles, the authors propose a categorization of dirty work clients and analyze how they can be a source of stigma through interactions with workers. The study also examines the feedback loops between clients' and workers' behaviors and discourses, exploring how clients can reinforce or alleviate the experience of dirty work stigma.
INTERNATIONAL JOURNAL OF MANAGEMENT REVIEWS
(2023)
Article
Economics
Tareq Saeed, Elie Bouri, Hamed Alsulami
Summary: This study uses quantile-based estimators to measure return connectedness between clean energy stocks, green bonds, crude oil, and energy ETF at the left and right tails. The research finds that return connectedness is larger at both tails, indicating the inappropriateness of using mean-based measures. Additionally, it shows that return connectedness measures vary with time but are less volatile in the tails, demonstrating asymmetric behavior.
Article
Multidisciplinary Sciences
Devarahandhi Achini Melda De Silva, Renda Kankanamge Chaturika Jeewanthi, Rajapakshage Heshani Navoda Rajapaksha, Weddagala Mudiyanselage Tharaka Bilindu Weddagala, Naoki Hirotsu, Bun-ichi Shimizu, Munasinghe Arachchige Jagath Priyantha Munasinghe
Summary: This study investigated the clean status, transparency, and authenticity of Ceylon cinnamon product labels, finding that consumers focus on ingredients, nutritional value, and safety standards, particularly third-party certifications. Additionally, Ceylon cinnamon faces competition in international markets due to lack of clean labels and traceability, but still has high demand among Millennials and upper-middle-class female consumers.
Article
Physics, Applied
Himanshu Chauhan, Rohit Kumar, G. D. Varma
Summary: We report the anisotropy in the superconducting properties of FeTe0.55Se0.45 bulk single crystal synthesized using the self-flux method. Magnetotransport, magnetic, and heat capacity measurements were performed on single crystals of the same batch. The anisotropy in the upper critical field, coherence length, and critical current density was studied under applied magnetic fields along the ab-plane and c-axis. The presence of 'peak effect' was observed in M-H loops for H parallel to c only, indicating the shift of the effect towards lower fields with increasing temperature. The pinning mechanisms were determined using the Dew Hughes scaling rule.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2022)
Article
Quantum Science & Technology
Daniel Bultrini, Samson Wang, Piotr Czarnik, Max Hunter Gordon, M. Cerezo, Patrick J. Coles, Lukasz Cincio
Summary: When error correction is possible, a large number of physical qubits must be allocated to each logical qubit. This work investigates the use of noisy qubits in conjunction with noiseless qubits, called the clean and dirty setup, and shows the appearance of Noise-Induced Barren Plateaus (NIBPs) in an Ising model Hamiltonian variational ansatz circuit. The study suggests that NIBPs cannot be fully overcome simply by error-correcting a subset of the qubits. However, the research also highlights the benefit of partial error correction with an exponential suppression in the concentration of gradient observables for each noiseless qubit in the circuit.
Article
Chemistry, Physical
N. Sirica, P. P. Orth, M. S. Scheurer, Y. M. Dai, M-C Lee, P. Padmanabhan, L. T. Mix, S. W. Teitelbaum, M. Trigo, L. X. Zhao, G. F. Chen, B. Xu, R. Yang, B. Shen, C. Hu, C-C Lee, H. Lin, T. A. Cochran, S. A. Trugman, J-X Zhu, M. Z. Hasan, N. Ni, X. G. Qiu, A. J. Taylor, D. A. Yarotski, R. P. Prasankumar
Summary: Symmetry plays a central role in conventional and topological phases of matter, making the ability to optically drive symmetry changes a critical step in developing future technologies. Topological materials, like topological semimetals, are particularly sensitive to changes in time-reversal and crystalline symmetries, affecting both bulk and surface electronic states. The study demonstrates ultrafast symmetry breaking using optically driven photocurrents.
Article
Physics, Multidisciplinary
Song Bao, Wei Wang, Yanyan Shangguan, Zhengwei Cai, Zhao-Yang Dong, Zhentao Huang, Wenda Si, Zhen Ma, Ryoichi Kajimoto, Kazuhiko Ikeuchi, Shin-ichiro Yano, Shun-Li Yu, Xiangang Wan, Jian-Xin Li, Jinsheng Wen
Summary: In this research, the coexistence and interplay between local moments and itinerant electrons in the metallic ferromagnet Fe2.72GeTe2 were studied using inelastic neutron scattering. Spectroscopic evidence was provided, and the Kondo effect between local moments and itinerant electrons was revealed. These findings have significant implications for understanding magnetism in transition-metal compounds.
Article
Physics, Multidisciplinary
Xiaoxue Zhao, Kejing Ran, Jinghui Wang, Song Bao, Yanyan Shangguan, Zhentao Huang, Junbo Liao, Bo Zhang, Shufan Cheng, Hao Xu, Wei Wang, Zhao-Yang Dong, Siqin Meng, Zhilun Lu, Shin-ichiro Yano, Shun-Li Yu, Jian-Xin Li, Jinsheng Wen
Summary: Experimental study on the evolution of magnetic excitations of α-RuCl3 under an in-plane magnetic field reveals the emergence of a pure QSL state near the critical field. This suggests that an in-plane magnetic field can drive α-RuCl3 into the long-sought QSL state.
CHINESE PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Kejing Ran, Yizhou Liu, Haonan Jin, Yanyan Shangguan, Yao Guang, Jinsheng Wen, Guoqiang Yu, Gerrit van der Laan, Thorsten Hesjedal, Shilei Zhang
Summary: A major challenge in topological magnetism is the exploration of three-dimensional magnetic textures. This study focuses on how two-dimensional skyrmion sheets vertically stack to form distinct types of three-dimensional topological strings. The research presents a new type of axially bound magnetic skyrmion string state, where the strings in two distinct materials are glued together across their interface. Through quasi-tomographic resonant elastic X-ray scattering, the 3D skyrmion profiles before and after their binding across the interface were determined and compared. The findings reveal that the attractive binding is accompanied by repulsive twisting, indicating mutual influence between the coupled skyrmions through compensating twisting. This state exists in chiral magnet-magnetic thin film heterostructures, providing a new avenue for engineering three-dimensional topological phases.
Article
Multidisciplinary Sciences
Gan Liu, Xinran Ma, Kuanyu He, Qing Li, Hengxin Tan, Yizhou Liu, Jie Xu, Wenna Tang, Kenji Watanabe, Takashi Taniguchi, Libo Gao, Yaomin Dai, Hai-Hu Wen, Binghai Yan, Xiaoxiang Xi
Summary: Unusual large-frequency collective lattice excitations, known as amplitude modes, are observed in CsV3Sb5, a Kagome metal, in the absence of phonon softening, providing evidence of strong electron-phonon coupling.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Multidisciplinary
D. Nevola, N. Zaki, J. M. Tranquada, W. -G. Yin, G. D. Gu, Q. Li, P. D. Johnson
Summary: An intense debate has arisen recently regarding the changes induced by light in iron-chalcogenide superconductors, specifically the enhancement of superconductivity and the emergence of a metastable state. Through high-energy resolution techniques, we directly observe the melting of superconductivity on ultrafast timescales. Our results demonstrate a non-equilibrium response on short timescales, with the gap filling in before the destruction of the superconducting peak, followed by a metastable response. We propose that pair phase decoherence and an increase in double-stripe correlations competing with superconductivity could explain these observations. These findings contribute to the exciting advancements in iron-based superconductors and suggest that the photoinduced metastable state may compete with superconductivity.
Article
Materials Science, Multidisciplinary
Zhongtuo Fu, Ruokai Xu, Song Bao, Yanyan Shangguan, Xin Liu, Zijuan Lu, Yingqi Chen, Shuhan Zheng, Yongjun Zhang, Meifeng Liu, Xiuzhang Wang, Hong Li, Huiqian Luo, Jun-Ming Liu, Zhen Ma, Jinsheng Wen
Summary: Very recently, the 3D honeycomb cobaltate Na2Co2TeO6 has attracted significant attention due to its potential proximity to the Kitaev spin-liquid state. In this study, we investigated the effects of Zn substitution on Na2Co2-xZnxTeO6 using various measurements. We found that Zn doping can suppress the magnetic order and potentially induce a quantum paramagnetic state, providing a platform to explore the Kitaev physics in this system.
PHYSICAL REVIEW MATERIALS
(2023)
Article
Physics, Condensed Matter
Bing Yao, Weilin Liu, Xiaoxiang Zhou, Jiangfeng Yang, Xianlei Huang, Zihao Fu, Guowen Yuan, Yuefeng Nie, Yaomin Dai, Jie Xu, Libo Gao
Summary: In this study, large-scale Cr2S3 and Cr2Se3 films with controllable thickness were successfully grown and their crystalline qualities were confirmed. The thickness-dependent Raman vibrations were systematically investigated, showing a slight redshift with increasing thickness. The 1.9 nm thick Cr2S3 and Cr2Se3 films exhibited narrow optical bandgap and different electrical properties.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2023)
Article
Physics, Multidisciplinary
Yanyan Shangguan, Song Bao, Zhao-Yang Dong, Ning Xi, Yi-Peng Gao, Zhen Ma, Wei Wang, Zhongyuan Qi, Shuai Zhang, Zhentao Huang, Junbo Liao, Xiaoxue Zhao, Bo Zhang, Shufan Cheng, Hao Xu, Dehong Yu, Richard A. Mole, Naoki Murai, Seiko Ohira-Kawamura, Lunhua He, Jiazheng Hao, Qing-Bo Yan, Fengqi Song, Wei Li, Shun-Li Yu, Jian-Xin Li, Jinsheng Wen
Summary: The authors have observed a one-third magnetization plateau in the spin-1 antiferromagnet Na3Ni2BiO6 with a honeycomb lattice, indicating the presence of frustrated interactions. The results suggest that Kitaev interactions can be realized in high-spin magnets.
Article
Materials Science, Multidisciplinary
Zhongtuo Fu, Ruokai Xu, Yingqi Chen, Song Bao, Hong Du, Jiahua Min, Shuhan Zheng, Yongjun Zhang, Meifeng Liu, Xiuzhang Wang, Hong Li, Ruidan Zhong, Huiqian Luo, Jun -Ming Liu, Zhen Ma, Jinsheng Wen
Summary: This study investigates the chemical doping effect on the magnetic ground states of Na3Co2SbO6 by partially substituting magnetic Co2+ with nonmagnetic Zn2+. The results show that the antiferromagnetic transition temperature is continuously suppressed with increasing Zn content and no long-range magnetic order or spin freezing is observed when the Zn content is above 0.2. This study demonstrates the potential for inducing a gapless quantum spin liquid state through doping in a Kitaev system.
Article
Materials Science, Multidisciplinary
Xiaoxiang Zhou, Yongkai Li, Xinwei Fan, Jiahao Hao, Ying Xiang, Zhe Liu, Yaomin Dai, Zhiwei Wang, Yugui Yao, Hai-Hu Wen
Summary: In the study of AV3Sb5, it was found that the CDW gap ACDW increases with the increase in alkali-metal atom radius from K to Cs, while TCDW first rises and then drops, failing to establish a scaling relation with ACDW. The observed enhancement of electronic correlations in CsV3Sb5 suppresses the CDW but enhances SC, suggesting that electronic correlations play an important role in manipulating the CDW and its entanglement with SC in AV3Sb5.
Article
Materials Science, Multidisciplinary
J. Sears, Y. Shen, M. J. Krogstad, H. Miao, E. S. Bozin, I. K. Robinson, G. D. Gu, R. Osborn, S. Rosenkranz, J. M. Tranquada, M. P. M. Dean
Summary: The interaction between charge density wave (CDW) and lattice plays a crucial role in La1.875Ba0.125CuO4, inducing periodic modulation of Cu-Cu spacing within the CuO2 planes and out-of-plane breathing modulation of lanthanum layers. The CDW-related structural distortions propagate through the crystal, leading to overlapping structural modulations in adjacent layers and within the same layer. This effect could facilitate the coupling of CDWs between adjacent planes.
Article
Materials Science, Multidisciplinary
I. Mohelsky, J. Wyzula, B. A. Piot, G. D. Gu, Q. Li, A. Akrap, M. Orlita
Summary: Using Landau-level spectroscopy, the temperature dependence of the energy band gap in zirconium pentatelluride (ZrTe5) is determined. It is found that the band gap reaches E-g = (5 & PLUSMN; 1) meV at low temperatures and increases monotonically with the temperature. This implies that ZrTe5 is a weak topological insulator with noninverted ordering of electronic bands in the center of the Brillouin zone. Magnetotransport experiments show that the resistivity anomaly in ZrTe5 is not connected with the temperature dependence of the band gap.
Article
Materials Science, Multidisciplinary
L. Cheng, F. C. Fei, H. Hu, Y. M. Dai, F. Q. Song, J. Qi
Summary: In this study, we used ultrafast optical pump-probe spectroscopy to investigate the quasiparticle dynamics in the type-II Dirac semimetal NiTe2. We observed anomalous dynamic optical responses around the critical temperature T* (-60 K), which were also confirmed by transport experiments. Specifically, our results revealed a phonon-assisted electron-hole recombination process that showed an anomaly at T* <^>' 60 K. We discovered an unusual behavior of phonon renormalization, characterized by anomalies in the temperature-dependent phonon energy and lifetime at T*. We found that these anomalies were due to the sudden shift of the phonon mode involved in the recombination, which was caused by the abrupt change in electronic structure near the Fermi surface. These findings provide deeper insights into the nonequilibrium carrier and lattice properties in topological materials.
Article
Materials Science, Multidisciplinary
Jiahao Hao, Wenshan Hong, Xiaoxiang Zhou, Ying Xiang, Yaomin Dai, Huan Yang, Shiliang Li, Huiqian Luo, Hai-Hu Wen
Summary: The optical properties of KCa2Fe4As4F2 and KCa2(Fe0.95Ni0.05)(4)As4F2 have been studied, and nodeless superconducting gaps are observed in both samples. However, the superconducting gap in K12442 suggests strong-coupling Cooper pairs, while in Ni-K12442, it supports the BCS weak-coupling pairing state. Additionally, a pseudogap is observed in K12442 at higher temperatures, while no such behavior is detected in Ni-K12442.
