Article
Chemistry, Multidisciplinary
Philip Willke, Tobias Bilgeri, Xue Zhang, Yu Wang, Christoph Wolf, Herve Aubin, Andreas Heinrich, Taeyoung Choi
Summary: Control of single electron spins is promising for spintronics. Using single molecular magnets as hosts allows for coherent spin manipulation and individual addressable molecular spins in self-assemblies.
Article
Materials Science, Multidisciplinary
R. Jansen, A. Spiesser, Y. Fujita, H. Saito, S. Yamada, K. Hamaya, S. Yuasa
Summary: The spin voltages produced in lateral spin-transport devices were investigated, revealing that the signals are influenced by various factors such as spin transport of mobile carriers, spin accumulation, and local spin signals. Additionally, a clear broad Hanle signal from confined electrons was observed in the nonlocal spin signal, which was suggested to be mediated by heat flow.
Article
Multidisciplinary Sciences
Ke Wang, Gang Xu, Fei Gao, He Liu, Rong-Long Ma, Xin Zhang, Zhanning Wang, Gang Cao, Ting Wang, Jian-Jun Zhang, Dimitrie Culcer, Xuedong Hu, Hong-Wen Jiang, Hai-Ou Li, Guang-Can Guo, Guo-Ping Guo
Summary: Hole-spin qubits in germanium show promise for rapid, all-electrical qubit control. The authors demonstrate ultrafast single-spin manipulation in a hole-based double quantum dot in a germanium hut wire, with a record Rabi frequency exceeding 540 MHz. These results suggest the potential for ultrafast coherent control of hole spin qubits to meet the requirements for scalable quantum information processing.
NATURE COMMUNICATIONS
(2022)
Article
Energy & Fuels
Zetao Ding, Di Yan, Josua Stuckelberger, Sieu Pheng Phang, Wenhao Chen, Christian Samundsett, Jie Yang, Zhao Wang, Peiting Zheng, Xinyu Zhang, Yimao Wan, Daniel Macdonald
Summary: Phosphorus spin-on doping is proposed as an alternative doping method for high performance poly-Si passivating contacts, showing promising results in promoting efficiency of silicon solar cells.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Chemistry, Multidisciplinary
Fadis F. Murzakhanov, Georgy Vladimirovich Mamin, Sergei Borisovich Orlinskii, Uwe Gerstmann, Wolf Gero Schmidt, Timur Biktagirov, Igor Aharonovich, Andreas Gottscholl, Andreas Sperlich, Vladimir Dyakonov, Victor A. Soltamov
Summary: In this study, we demonstrated the coherent coupling of negatively charged boron vacancies (V-B(-)) with surrounding nuclei in hexagonal boron nitride (hBN), which meets the basic requirements for quantum technology applications. We successfully achieved the readout of the V-B(-) spin coherence using various techniques and showed the characteristics of elongation of coherence time and modulation of Hahn-echo decay. Additionally, the DFT calculation confirmed the confined electron-nuclear coupling in the defective layer.
Article
Physics, Multidisciplinary
D. M. Jackson, D. A. Gangloff, J. H. Bodey, L. Zaporski, C. Bachorz, E. Clarke, M. Hugues, C. Le Gall, M. Atature
Summary: The coupling between a semiconductor nuclear spin ensemble and an electron-spin quantum dot enables the detection of a single excitation with parts-per-million accuracy. This breakthrough in quantum sensing allows for investigating emergent quantum phenomena and potential applications in probing engineered quantum states of the ensemble.
Article
Chemistry, Multidisciplinary
Fadis Murzakhanov, Georgy Vladimirovich Mamin, Sergei Orlinskii, Margarita Goldberg, Nataliya Petrakova, Alexander Y. Fedotov, Peter Grishin, Marat R. Gafurov, Vladimir S. Komlev
Summary: This paper presents applications of pulsed electron paramagnetic resonance (EPR) and hyperfine interaction spectroscopy approaches for investigating synthetic calcium phosphates doped with various cations. The study shows the reliability of these techniques in obtaining unique information about impurity centers and structural changes in the materials caused by cation doping. The use of resonance techniques provides valuable insights into the presence and localization of impurity centers in calcium phosphates.
Article
Chemistry, Physical
Anastasia Kultaeva, Andreas Poeppl, Timur Biktagirov
Summary: This study explores the application of metal-organic frameworks as host matrices for sensing spin centers. The coupling between the sensor and the target molecular species allows for atomic-scale insight into their spatial distribution.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Materials Science, Multidisciplinary
L. R. Schreiber, C. Schwark, G. Guntherodt, M. Lepsa, C. Adelmann, C. J. Palmstrom, X. Lou, P. A. Crowell, B. Beschoten
Summary: The study demonstrates the feasibility of phase control of semiconductor spins through a pulsed electrical scheme. Fast current pulses are used to inject phase coherent spin packets at the metal-semiconductor interface, and phase coherence is observed through time-resolved Faraday rotation.
Article
Materials Science, Multidisciplinary
P. Huillery, J. Leibold, T. Delord, L. Nicolas, J. Achard, A. Tallaire, G. Hetet
Summary: This study demonstrates the efficient transfer of electron spins to nuclear spins in NV centers under ambient conditions with uncritical magnetic field angles. This technique has the potential to enhance the sensitivity of NV sensors and could be utilized for long-lived storage of microwave photons and coupling nuclear spins to mechanical oscillators in the resolved sideband regime.
Article
Materials Science, Multidisciplinary
Victor A. Soltamov, Boris Yavkin, Andrey N. Anisimov, Harpreet Singh, Anna P. Bundakova, Georgy Mamin, Sergei B. Orlinskii, Evgeniy N. Mokhov, Dieter Suter, Pavel G. Baranov
Summary: The study demonstrates coherent spin manipulations of spin-3/2 color center ensembles in 6H-SiC crystal under high magnetic fields, showing room temperature control and a decrease in relaxation times T-1 and T-2 with increasing temperature and magnetic field strength. The experiments also reveal the potential for optically detecting the spin alignment between M-S = +/- 3/2 in spin-3/2 color centers through optically pumped silent M-S = +/- 1/2 sublevels, including the observation of Rabi oscillations.
Article
Multidisciplinary Sciences
Jun-Feng Wang, Fei-Fei Yan, Qiang Li, Zheng-Hao Liu, Jin-Ming Cui, Zhao-Di Liu, Adam Gali, Jin-Shi Xu, Chuan-Feng Li, Guang-Can Guo
Summary: The authors use anti-Stokes excitation to detect Si vacancy spins in SiC, achieving a threefold improvement in signal contrast, and show promising applications in quantum information processing and quantum sensing.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Inorganic & Nuclear
Matteo Atzori, Elena Garlatti, Giuseppe Allodi, Simone Chicco, Alessandro Chiesa, Andrea Albino, Roberto De Renzi, Enrico Salvadori, Mario Chiesa, Stefano Carretta, Lorenzo Sorace
Summary: A comprehensive characterization of a 3d organometallic complex is reported, showing its potential for quantum computing applications.
INORGANIC CHEMISTRY
(2021)
Article
Materials Science, Multidisciplinary
M. Yamada, T. Ueno, T. Naito, K. Sawano, K. Hamaya
Summary: By using pure spin current transport measurements in lateral spin-valve devices, the study focused on spin relaxation in a lightly doped n-type nondegenerate Ge layer, revealing that the spin diffusion length and electron spin lifetime of nondegenerate Ge increased with decreasing temperature. The findings suggest that the donor-driven spin relaxation mechanism, including the 1/root T behavior in multivalley semiconductors, plays a significant role in moderately doped nondegenerate Ge.
Article
Materials Science, Multidisciplinary
Jiai Ning, Wanli Peng, Wei Wang, Zhendong Chen, Pei Yang, Yequan Chen, Yafei Zhao, Yizhe Sun, Moorthi Kanagaraj, Long Yang, Qinwu Gao, Junran Zhang, Degang Zhao, Danfeng Pan, Xuezhong Ruan, Yao Li, Wenqing Liu, Liang He, Zhi-Gang Chen, Yongbing Xu
Summary: This study reports the electrical detection of spin-transport properties of ZrTe5 nanowires using a nonlocal geometry measurement. The observed hysteresis voltage signal depends on the relative orientations between the magnetization of ferromagnetic electrodes and carrier spin polarization. Results demonstrate the spin-momentum locking feature of ZrTe5 nanowires, allowing for control of spin-polarized current by altering electron movement direction, potentially enabling small-sized devices based on topological materials.
Article
Physics, Multidisciplinary
M. Mueller, L. Liensberger, L. Flacke, H. Huebl, A. Kamra, W. Belzig, R. Gross, M. Weiler, M. Althammer
Summary: In this study, we investigate the injection of quasiparticle spin currents into a superconductor via spin pumping from an adjacent ferromagnetic metal layer. We observe a suppression of the dampinglike torque generated in the Pt layer by the inverse spin Hall effect below the superconducting transition temperature Tc, along with a large fieldlike current-induced torque.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Applied
Paul Rosenberger, Matthias Opel, Stephan Gepraegs, Hans Huebl, Rudolf Gross, Martina Mueller, Matthias Althammer
Summary: The study observed the SMR phenomenon in ferromagnetic EuO/W thin film bilayers, finding that the imaginary part of the complex spin mixing interface conductance is significantly larger than the real part, and both decrease with increasing temperature, which is in agreement with thermal fluctuations in the ferromagnet.
APPLIED PHYSICS LETTERS
(2021)
Article
Engineering, Electrical & Electronic
A. V. Chumak, P. Kabos, M. Wu, C. Abert, C. Adelmann, A. O. Adeyeye, J. Akerman, F. G. Aliev, A. Anane, A. Awad, C. H. Back, A. Barman, G. E. W. Bauer, M. Becherer, E. N. Beginin, V. A. S. V. Bittencourt, Y. M. Blanter, P. Bortolotti, I. Boventer, D. A. Bozhko, S. A. Bunyaev, J. J. Carmiggelt, R. R. Cheenikundil, F. Ciubotaru, S. Cotofana, G. Csaba, O. V. Dobrovolskiy, C. Dubs, M. Elyasi, K. G. Fripp, H. Fulara, I. A. Golovchanskiy, C. Gonzalez-Ballestero, P. Graczyk, D. Grundler, P. Gruszecki, G. Gubbiotti, K. Guslienko, A. Haldar, S. Hamdioui, R. Hertel, B. Hillebrands, T. Hioki, A. Houshang, C. -M. Hu, H. Huebl, M. Huth, E. Iacocca, M. B. Jungfleisch, G. N. Kakazei, A. Khitun, R. Khymyn, T. Kikkawa, M. Klaui, O. Klein, J. W. Klos, S. Knauer, S. Koraltan, M. Kostylev, M. Krawczyk, I. N. Krivorotov, V. V. Kruglyak, D. Lachance-Quirion, S. Ladak, R. Lebrun, Y. Li, M. Lindner, R. Macedo, S. Mayr, G. A. Melkov, S. Mieszczak, Y. Nakamura, H. T. Nembach, A. A. Nikitin, S. A. Nikitov, V. Novosad, J. A. Otalora, Y. Otani, A. Papp, B. Pigeau, P. Pirro, W. Porod, F. Porrati, H. Qin, B. Rana, T. Reimann, F. Riente, O. Romero-Isart, A. Ross, A. V. Sadovnikov, A. R. Safin, E. Saitoh, G. Schmidt, H. Schultheiss, K. Schultheiss, A. A. Serga, S. Sharma, J. M. Shaw, D. Suess, O. Surzhenko, K. Szulc, T. Taniguchi, M. Urbanek, K. Usami, A. B. Ustinov, T. van der Sar, S. van Dijken, V. I. Vasyuchka, R. Verba, S. Viola Kusminskiy, Q. Wang, M. Weides, M. Weiler, S. Wintz, S. P. Wolski, X. Zhang
Summary: Magnonics is a discipline that explores the physical properties of spin waves and utilizes them for data processing. It offers several advantages, such as scalability to atomic dimensions, operation in high-frequency ranges, utilization of nonlinear and nonreciprocal phenomena, and compatibility with CMOS technology. Although primarily in the academic domain, extensive research is being conducted to address the scientific and technological challenges, with several proof-of-concept prototypes already realized in laboratories.
IEEE TRANSACTIONS ON MAGNETICS
(2022)
Article
Multidisciplinary Sciences
Thomas Luschmann, Philip Schmidt, Frank Deppe, Achim Marx, Alvaro Sanchez, Rudolf Gross, Hans Huebl
Summary: The study investigates an inductively coupled nano-electromechanical system using a superconducting quantum interference device (SQUID) for coupling, showing that the resonance frequency of the mechanically compliant string embedded into the SQUID loop can be controlled by adjusting the bias magnetic flux and in-plane bias magnetic field. These findings are quantitatively explained by the inductive interaction contributing to the effective spring constant of the mechanical resonator, with an additional observation of a residual field dependent shift in the mechanical resonance frequency attributed to flux pinning of vortices trapped in the nanostring under bias.
SCIENTIFIC REPORTS
(2022)
Article
Physics, Applied
F. Engelhardt, V. A. S. V. Bittencourt, H. Huebl, O. Klein, S. Viola Kusminskiy
Summary: Developing schemes for efficient and broadband frequency conversion of quantum signals is a challenge in modern quantum information field. In this work, a two-stage conversion protocol is proposed using resonant interaction between magnetic and mechanical excitations as a mediator between microwave and optical photons. High conversion efficiency is predicted without the requirement of matching cooperativities.
PHYSICAL REVIEW APPLIED
(2022)
Article
Nanoscience & Nanotechnology
Florian Pantle, Simon Woerle, Monika Karlinger, Felix Rauh, Max Kraut, Martin Stutzmann
Summary: Nanostructures, such as GaN nanofins, are sensitive to their ambient conditions due to their large surface-to-volume ratio. This article presents a systematic study on the environmental sensitivity of the electrical conductivity of GaN nanofins and identifies oxygen and water as responsible for reducing the electrical current through GaN nanofins. The results also reveal the complexity of water adsorption on GaN surfaces and the importance of reproducible pre-treatment and surface passivation.
Correction
Chemistry, Multidisciplinary
Florian Pantle, Fabian Becker, Max Kraut, Simon Woerle, Theresa Hoffmann, Sabrina Artmeier, Martin Stutzmann
Summary: The study demonstrates the selective area growth of GaN nanowires and nanofins on heteroepitaxial diamond (001) substrates using molecular beam epitaxy. By optimizing the growth conditions and using locally produced substrates, high-quality nanostructures were successfully grown, providing new possibilities for optoelectronic device applications.
NANOSCALE ADVANCES
(2023)
Article
Physics, Applied
Florian Pantle, Monika Karlinger, Simon Woerle, Fabian Becker, Theresa Hoeldrich, Elise Sirotti, Max Kraut, Martin Stutzmann
Summary: GaN nanostructures with 3D structure and non-polar crystal surfaces have great potential for a wide range of applications. Controlling the formation of side crystal facets is crucial for the stability and performance of GaN-based devices. By tuning the III-V ratio and nitrogen flux, the crystal facet formation on nanowire sidewalls can be controlled, and GaN nanofins with different side crystal facets can be grown. The study also reveals the growth mechanisms of the nanostructures and the correlation between growth kinetics and the formation of structural defects.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Richard Schlitz, Luise Siegl, Takuma Sato, Weichao Yu, Gerrit E. W. Bauer, Hans Huebl, Sebastian T. B. Goennenwein
Summary: This study explores the effect of phonon pumping on room-temperature ferromagnetic resonance spectra and finds the formation of magnon polarons at low frequencies and additional slowly oscillating phonon pumping at higher frequencies. Furthermore, the study also discovers the magnon-phonon coupling of a perpendicular standing spin wave mode.
Article
Materials Science, Multidisciplinary
Janine Gueckelhorn, Akashdeep Kamra, Tobias Wimmer, Matthias Opel, Stephan Gepraegs, Rudolf Gross, Hans Huebl, Matthias Althammer
Summary: The pseudospin of spin-up and spin-down magnons can describe the phenomena in antiferromagnets, which are similar to electronic charge carriers. The experimental study of the dynamics of antiferromagnetic pseudospin and the observation of the magnon Hanle effect have been reported. Platinum strips are used in the experiment to realize spin injection and detection, and their influence on the generation and transport of magnons in antiferromagnetic insulator films is investigated.
Article
Materials Science, Multidisciplinary
M. Mueller, T. Luschmann, A. Faltermeier, S. Weichselbaumer, L. Koch, G. B. P. Huber, H. W. Schumacher, N. Ubbelohde, D. Reifert, T. Scheller, F. Deppe, A. Marx, S. Filipp, M. Althammer, R. Gross, H. Huebl
Summary: In this study, we systematically investigated the performance of compact NbTiN microwave resonators under different temperature and magnetic field conditions. The results show that the resonators exhibit good quality factors and power factors at suitable temperatures.
MATERIALS FOR QUANTUM TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
J. Gueckelhorn, T. Wimmer, M. Mueller, S. Gepraegs, H. Huebl, R. Gross, M. Althammer
Summary: This study examines the magnon transport in a yttrium iron garnet thin film with reduced effective magnetization. By applying a current to a modulator electrode, the effective magnon conductivity can be increased by up to six times, with damping compensation generated above a threshold current. Additionally, the threshold current shows a linear dependence on the applied magnetic field due to reduced effective magnetization and circular magnetization precession.
Article
Materials Science, Multidisciplinary
Ei Shigematsu, Lukas Liensberger, Mathias Weiler, Ryo Ohshima, Yuichiro Ando, Teruya Shinjo, Hans Huebl, Masashi Shiraishi
Summary: Semiconductor/ferromagnet hybrid systems are used to investigate spin conversion physics, but rectification currents have been a problem. A study on Si-based heterostructures using a microwave frequency inductive technique revealed the influence of Si doping on spin-orbit torque conductivity and observed a change in spin to charge conversion. These findings provide insights for further exploration of spin-conversion physics in metal/semiconductor heterostructures.
Article
Materials Science, Multidisciplinary
A. Aqeel, M. Azhar, N. Vlietstra, A. Pozzi, J. Sahliger, H. Huebl, T. T. M. Palstra, C. H. Back, M. Mostovoy
Summary: By measuring the SMR of Cu2OSeO3, distinct changes in signal are observed between different magnetic phases; the SMR phase and amplitude show different characteristics in the skyrmion lattice and conical spiral states.
Article
Physics, Multidisciplinary
Jasmin Graf, Sanchar Sharma, Hans Huebl, Silvia Viola Kusminskiy
Summary: The concept of an optomagnonic crystal involves a periodically patterned structure based on a magnetic dielectric, capable of co-localizing magnon and photon modes for quantum information processing and conversion schemes. The theoretical study on a simple geometry with a ferrimagnet material revealed that optimal magnon and photon modes can be localized to maximize coupling, achieving optomagnonic coupling in the kHz range. Possible routes for optimization to improve coupling strengths and optical losses were also discussed.
PHYSICAL REVIEW RESEARCH
(2021)
