Article
Materials Science, Multidisciplinary
Xueli Yang, Ankang Guo, Lidan Guo, Yunqi Liu, Xiangnan Sun, Yunlong Guo
Summary: This article summarizes the basic operating principle and mechanism of organic spin valves (OSVs) and discusses the importance of accomplishing room-temperature spin transport, FM electrode selection, and spinterface. The state-of-the-art progress of organic semiconductors (OSCs) with room-temperature spin transport in spin valves is reviewed. Furthermore, the effects of carrier mobility and spin relaxation time on the spin diffusion length are systematically analyzed. A feasible perspective for improving the spin transport properties of OSCs is presented.
ACS MATERIALS LETTERS
(2022)
Article
Multidisciplinary Sciences
Yuwaraj Adhikari, Tianhan Liu, Hailong Wang, Zhenqi Hua, Haoyang Liu, Eric Lochner, Pedro Schlottmann, Binghai Yan, Jianhua Zhao, Peng Xiong
Summary: Chirality is a significant property in physics, chemistry, and biology. A recent study found that electrons become spin polarized after passing through chiral molecules, leading to chirality-induced spin selectivity. In this research, the role of spin-orbit coupling (SOC) in the metal electrode for the CISS spin valve effect was investigated through magnetoconductance measurements on magnetic semiconductor-based chiral molecular spin valves with normal metal electrodes of contrasting SOC strengths. The results highlight the essential role of SOC in converting the orbital polarization induced by the chiral molecular structure to spin polarization.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Dong Li, Yuanhui Zheng, Mingwei Yang, Congyuan Wei, Xitong Liu, Naihang Zheng, Weifeng Zhang, Kuijuan Jin, Gui Yu
Summary: The organic interlayer in organic spin valves plays a crucial role in device performance. In this study, conjugated polymers based on isoindigo derivatives were used to fabricate organic spin valves, and the dependence of performance on polymer structure was investigated.
ACS MATERIALS LETTERS
(2022)
Article
Multidisciplinary Sciences
Chun-Pu Wang, Shih-Hung Cheng, Wen-Jeng Hsueh
Summary: In this paper, the advantages of using two-dimensional materials for spintronic device designs are investigated. A spin valve based on graphene nanoribbons is proposed to generate a large spin current density at room temperature, which can reach the critical value with the help of a tunable gate voltage. This proposed spin valve overcomes the difficulties faced by traditional magnetic tunnel junction-based magnetic random-access memories and meets the criteria for the reading mode, opening up possibilities for spin logic devices based on 2D materials.
SCIENTIFIC REPORTS
(2023)
Article
Materials Science, Multidisciplinary
Dongxue Yu, Shuaishuai Ding, Jing Li, Wenbo Mi, Yuan Tian, Wenping Hu
Summary: This study reports for the first time the use of molecular doping as an effective strategy to enhance conductivity and modify spinterface in vertical OSV devices, showing a significant improvement in both conductivity and magnetoresistance ratio. The doping of F(4)TCNQ in the form of free radicals creates a spin-dependent hybrid interfacial state (SDHIS) which exhibits an extra interface magnetoresistance (IMR) effect on top of the standard giant magnetoresistance (GMR) effect.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Physical
Qihong Wu, Rongkun Liu, Zhanjun Qiu, Dengfeng Li, Jie Li, Xiaotian Wang, Guangqian Ding
Summary: In this study, spintronic devices based on Cr3X4 (X = Se, Te) monolayers were designed and their spin transport properties were investigated. The Cr3Te4 monolayer showed spin filtering and a dual-spin diode effect, while the Cr3Se4 monolayer was an excellent platform for a spin valve. Interestingly, the Cr3Se4 monolayer based device also exhibited a negative differential resistance effect and a high magnetoresistance ratio. These findings highlight the potential of Cr3X4 (X = Se, Te) monolayers in spintronic applications and provide realistic materials for nanoscale spintronic devices.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
B. Kaiser, J. Ramberger, J. D. Watts, J. Dewey, Y. Zhang, C. Leighton
Summary: In order to increase the spin signal, we integrated high-spin-polarization Co-Fe alloy ferromagnetic injectors and detectors into Al-based non-local spin valves. Smooth, polycrystalline (110-textured), solid-solution body-centered-cubic Co75Fe25 films were generated by room-temperature deposition on amorphous substrates from an alloy target, characterized by various techniques. Integration into transparent-interface Al non-local spin valves resulted in a similar to 5-fold enhancement of the spin signal relative to Co, with temperature-independent current spin polarizations exceeding 60%. Comparisons with prior literature show that Co-Fe alloys offer a facile route to higher spin polarization and spin signals in non-local spin valves, with minimal barrier to adoption.
Review
Chemistry, Multidisciplinary
Pramod Ghising, Chandan Biswas, Young Hee Lee
Summary: An alternative approach to charge-based electronics is to use the spin degree of freedom for information communication and processing. Graphene, with its long spin-diffusion length at room temperature, shows promise for highly scalable spintronics. The development of graphene spin valves has paved the way for spin devices in graphene, such as spin field-effect transistors and spin majority logic gates. This review examines the progress in graphene spin valves and their role in advancing spin logic devices, discussing different transport mechanisms and comparing the energy efficiency between graphene spin valves and charge-based field-effect transistors.
ADVANCED MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Xin He, Chenhui Zhang, Dongxing Zheng, Peng Li, John Q. Xiao, Xixiang Zhang
Summary: With the recent advancements in two-dimensional ferromagnets, it is now feasible to develop high-quality all-2D spintronic devices. In this study, nonlocal spin valves were successfully fabricated using Fe3GeTe2 as the spin source and detector and multilayer graphene as the spin transport channel. The spin transport signal strongly depended on temperature and vanished below the Curie temperature of the Fe3GeTe2 flakes. Our results suggest potential applications of van der Waals heterostructures in spintronic devices.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
C. Zucchetti, F. Scali, P. Grassi, M. Bollani, L. Anzi, G. Isella, M. Finazzi, F. Ciccacci, F. Bottegoni
Summary: We have developed a non-local architecture for spin current injection, manipulation, and detection in n-doped bulk Si at room temperature. Spins are generated by circularly polarized light at the indirect gap of bulk Si and detected using the inverse spin-Hall effect in a thin Pt pad deposited on the Si substrate. By applying a bias voltage, we can modulate the transport properties of the injected spin current, exploring both the spin diffusion and drift regimes.
Article
Chemistry, Physical
Longlong Zhang, Jun Zan, Yujuan Huang, Huiqin Cui, Yuying Hao
Summary: A mechanism for generating pure spin current in heterojunction organic solar cells is proposed, utilizing degenerate ground-state polymers for donor and acceptor to form solitons and separate spins without charge separations. This mechanism opens up a new avenue for potential organic spintronic devices.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Physics, Applied
E. Fourneau, A. V. Silhanek, N. D. Nguyen
Summary: Research shows that there is a significant error in using the Hanle precession method to evaluate spin diffusion when the distance between the inner and outer electrodes is smaller than 6 times the spin diffusion length. Solutions proposed in the study include adjusting the Hanle fit function and designing four-terminal nonlocal spin valves to accurately determine spin lifetime and spin diffusion coefficient.
PHYSICAL REVIEW APPLIED
(2021)
Article
Chemistry, Multidisciplinary
Yanfei Zhu, Lidan Guo, Jun Guo, Luyang Zhao, Chunyan Li, Xueying Qiu, Yang Qin, Xianrong Gu, Xiangnan Sun, Zhiyong Tang
Summary: Quantum-confined atomically precise metal nanoclusters (MNCs) are a new type of inorganic-organic hybrid semiconductor that have been widely used in chemical sensing, optical imaging, biomedicine and catalysis. Researchers have successfully designed and fabricated a spin valve (SV) based on MNCs, demonstrating remarkable magnetoresistance values and the ability to change the spin-dependent transport properties by altering the atomic structure of the MNCs.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Physics, Multidisciplinary
Jiaxin Du, Mei Li, Xue Zhang, Bin Xi, Yong-Jun Liu, Chun-Gui Duan, Jie Lu
Summary: This study investigates the steady-flow dynamics of ferromagnetic 180-degree domain walls in long and narrow spin valves with interfacial Dzyaloshinskii-Moriya interaction. The results show that the dynamics of the domain walls can be manipulated by controlling the magnetization orientation of the polarizers, providing possibilities for magnetic nanodevices with rich functionality and high robustness.
NEW JOURNAL OF PHYSICS
(2023)
Article
Physics, Multidisciplinary
M. Cosset-Cheneau, L. Vila, G. Zahnd, D. Gusakova, V. T. Pham, C. Grezes, X. Waintal, A. Marty, H. Jaffres, J-P Attane
Summary: Experimental evidence of spin absorption orientation dependence in ferromagnetic materials is provided, facilitating the quantification of spin-mixing conductance. The obtained values suggest a limitation by the Sharvin conductance, challenging traditional models based solely on Larmor, transverse decoherence, and spin diffusion lengths.
PHYSICAL REVIEW LETTERS
(2021)
Article
Nanoscience & Nanotechnology
Sara Catalano, Juan M. Gomez-Perez, M. Xochitl Aguilar-Pujol, Andrey Chuvilin, Marco Gobbi, Luis E. Hueso, Felix Casanova
Summary: Spin Hall magnetoresistance (SMR) is a reference tool used to investigate the magnetic properties of materials, but realistic surfaces may lead to unexpected artifacts in SMR due to defects and disorder. This study discovers that the SMR-like signal in heterostructures is generated by strong interfacial disorder, challenging the widespread assumption on the role of disorder in SMR measurements.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Daniel Tezze, Jose M. Pereira, Yaiza Asensio, Mihail Ipatov, Francesco Calavalle, Felix Casanova, Alexander M. Bittner, Maider Ormaza, Beatriz Martin-Garcia, Luis E. Hueso, Marco Gobbi
Summary: This research demonstrates the manipulation of magnetism in van der Waals antiferromagnet NiPS3 through intercalation of different organic cations, resulting in hybrid compounds with varying magnetic properties and transition temperatures. The processes of intercalation and cation exchange can be carried out in bulk crystals and few-layer flakes, providing a pathway for integrating intercalated magnetic materials into devices.
Article
Materials Science, Multidisciplinary
C. K. Safeer, Franz Herling, Won Young Choi, Nerea Ontoso, Josep Ingla-Aynes, Luis E. Hueso, Felix Casanova
Summary: Understanding spin physics in graphene is crucial for developing future spintronic devices. Recent studies have shown efficient spin-to-charge conversions in graphene through proximity with other materials. However, these conversions may be affected by other factors, which need to be taken into consideration.
Article
Materials Science, Multidisciplinary
Josep Ingla-Aynes, Inge Groen, Franz Herling, Nerea Ontoso, C. K. Safeer, Fernando de Juan, Luis E. Hueso, Marco Gobbi, Felix Casanova
Summary: This study demonstrates the conversion of spin currents polarized in different directions into charge currents in van der Waals heterostructures with tailored symmetry. The different components of spin-to-charge conversion observed are likely due to spin-orbit proximity and broken symmetry at the twisted graphene/NbSe2 interface. This finding opens up possibilities for the use of new architectures in spintronic devices.
Article
Chemistry, Multidisciplinary
Jose M. Pereira, Daniel Tezze, Iris Niehues, Yaiza Asensio, Haozhe Yang, Lars Mester, Shu Chen, Felix Casanova, Alexander M. Bittner, Maider Ormaza, Frederik Schiller, Beatriz Martin-Garcia, Rainer Hillenbrand, Luis E. Hueso, Marco Gobbi
Summary: The emergence of superconductivity and a charge density wave phase in air-stable organic cation intercalated MoS2 crystals is reported. The properties of the correlated electronic phases are shown to depend dramatically on the intercalated cation, demonstrating the potential of organic ion intercalation to finely tune the properties of 2D materials. Organic-ion intercalated MoS2 is established as a platform to study the emergence and modulation of correlated electronic phases.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Yaiza Asensio, Sergio Marras, Davide Spirito, Marco Gobbi, Mihail Ipatov, Felix Casanova, Aurelio Mateo-Alonso, Luis E. Hueso, Beatriz Martin-Garcia
Summary: Understanding the structural and magnetic properties of layered hybrid organic-inorganic metal halide perovskites (HOIPs) is crucial for their design and integration into spin-electronic devices. A systematic study on ten compounds reveals the influence of transition metals, organic spacers, and perovskite phases on the properties of these materials. Temperature-dependent Raman measurements show that the structural phase transitions are triggered by the motion of organic cations and flexibility of the inorganic metal-halide lattice. The behavior of Cu2+ HOIPs changes from a 2D ferromagnet to a quasi-3D antiferromagnet, while Mn2+ HOIPs exhibit rich magnetism including spin-canting and metamagnetism controlled by crystal anisotropy. Co2+ crystals, regardless of the organic spacer and perovskite phase, show dominant paramagnetic behavior. This research demonstrates the potential of exploiting the chemical flexibility of HOIPs to develop novel layered magnetic materials with tailored properties.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Won Young Choi, Isabel C. Arango, Van Tuong Pham, Diogo C. Vaz, Haozhe Yang, Inge Groen, Chia-Ching Lin, Emily S. Kabir, Kaan Oguz, Punyashloka Debashis, John J. Plombon, Hai Li, Dmitri E. Nikonov, Andrey Chuvilin, Luis E. Hueso, Ian A. . Young, Felix Casanova
Summary: This study demonstrates all-electrical spin-to-charge conversion in BixSe1-x nanodevices and reveals that the conversion efficiency can be overestimated by tens of times depending on the adjacent metal used as a contact. This is attributed to the intermixing-induced compositional change and the properties of a polycrystal. Strategies to improve the spin-to-charge conversion signal in similar structures for functional devices are discussed.
Article
Chemistry, Multidisciplinary
Sergi Martin-Rio, Carlos Frontera, Juan M. Gomez-Perez, Montserrat X. Aguilar-Pujol, Sara Catalano, Jaume Gazquez, Felix Casanova, Lluis Balcells, Alberto Pomar, Benjamin Martinez
Summary: Studies have shown that the uppermost LCMO interfacial layers are magnetically decoupled from the rest of the LCMO film, and do not exhibit long range magnetic ordering, behaving instead as a 2D Heisenberg ferromagnet according to recent SMR theories.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Multidisciplinary Sciences
Irene Dolado, Carlos Maciel-Escudero, Elizaveta Nikulina, Evgenii Modin, Francesco Calavalle, Shu Chen, Andrei Bylinkin, Francisco Javier Alfaro-Mozaz, Jiahan Li, James H. Edgar, Felix Casanova, Saul Velez, Luis E. Hueso, Ruben Esteban, Javier Aizpurua, Rainer Hillenbrand
Summary: In this study, nanoscale mapping of vibrational strong coupling between organic molecules and nanoresonators is achieved by remote near-field spectroscopy. The results demonstrate the localized hybrid polariton modes and coupling strengths on a single nanoresonator level, providing insights into the nanoscale vibrational strong coupling phenomenon.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Applied
Elihu Anouchi, Tony Yamin, Amos Sharoni
Summary: Memristive devices based on correlated Mott materials, utilizing a nonvolatile memristive three-terminal transistor, demonstrate the potential for high-performance electronic synaptic transistors. The devices utilize an ultrathin VO2 layer and alumina gate dielectric to achieve a nonvolatile and reversible modification of the channel's resistance. The field-induced oxygen motion mechanism at the VO2/Al2O3 interface is proposed and well-reproduced in a model. This study provides a proof of principle for future applications of Mott materials in memory and neuromorphic computation.
PHYSICAL REVIEW APPLIED
(2023)
Article
Chemistry, Multidisciplinary
Eugenio Calandrini, Kirill Voronin, Osman Balci, Maria Barra-Burillo, Andrei Bylinkin, Sachin M. Shinde, Subash Sharma, Felix Casanova, Luis E. Hueso, Andrei Chuvilin, Clifford Mcaleese, Ben R. Conran, Xiaochen Wang, Kenneth Teo, Valentyn S. Volkov, Andrea C. Ferrari, Alexey Y. Nikitin, Rainer Hillenbrand
Summary: This work reports the observation of phonon polaritons (PhPs) in wafer-scale multilayer hexagonal boron nitride (hBN) grown by chemical vapor deposition. PhPs are visualized using infrared nanoimaging, and their lifetimes are measured. PhP nanoresonators are also demonstrated. These results are of significant importance for applications in infrared spectroscopy and photodetectors based on PhPs.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Biomaterials
Ganit Indech, Lidor Geri, Chen Mordechai, Yarden Ben Moshe, Yitzhak Mastai, Orit Shefi, Amos Sharoni
Summary: Micro- and nano-particles are essential for various current and emerging technologies, particularly in biological studies and applications. Recent developments have led to multifunctional particles that can enhance their effectiveness and enable novel applications. However, conventional fabrication methods for particles are time-consuming and challenging to fine-tune for multifunctional applications. In this study, a simple and facile method for fabricating dome-shaped micron- and nano-sized particles was presented, which allows for the engineering of multifunctional particles with pre-defined properties for specific biological applications.
JOURNAL OF MATERIALS CHEMISTRY B
(2023)
Article
Multidisciplinary Sciences
Junhyeon Jo, Yuan Peisen, Haozhe Yang, Samuel Manas-Valero, Jose J. Baldovi, Yao Lu, Eugenio Coronado, Felix Casanova, F. Sebastian Bergeret, Marco Gobbi, Luis E. Hueso
Summary: We demonstrate novel devices based on the unique properties of two-dimensional materials, including infinite magnetoresistance and nonreciprocal charge transport, using NbSe2/CrSBr van der Waals superconducting spin valves. We also show the realization of a superconductive spin valve with multiple stable resistance states by integrating different CrSBr crystals in a lateral heterostructure.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Elihu Anouchi, Naor Vardi, Yoav Kalcheim, Ivan K. Schuller, Amos Sharoni
Summary: The recently discovered ramp reversal memory (RRM) is a nonvolatile memory effect observed in correlated oxides with temperature-driven insulator-metal transitions (IMT). It appears as a resistance increase at predefined temperatures that are set or erased by simple heating-cooling (i.e., ramp reversal) protocols. We provide clear evidence that the RRM is the outcome of a local increase in transition temperature of the microscopic-scale phase boundaries that are created during temperature ramp reversal (from heating to cooling) within the insulator-metal phase coexistence regime.
Article
Materials Science, Multidisciplinary
Seungjun Lee, D. J. P. de Sousa, Young-Kyun Kwon, Fernando de Juan, Zhendong Chi, Felix Casanova, Tony Low
Summary: In this study, we investigate the twist-angle dependence of spin-orbit coupling proximity effects and charge-to-spin conversion in graphene/WSe2 heterostructures from first principles. We find that the charge-to-spin conversion strongly depends on the twist angle, with optimal standard Rashba-Edelstein and disorder-free spin Hall efficiencies achieved at approximately 30 degrees twisting. The symmetry breaking due to twisting also gives rise to an unconventional Rashba-Edelstein effect, where the electrically generated nonequilibrium spin densities possess spins collinear to the applied electric field. Our work provides a new perspective on the electrical generation of spins in van der Waals heterostructures.
