Article
Materials Science, Multidisciplinary
Biel Martinez, Jose Carlos Abadillo-Uriel, Esteban A. Rodriguez-Mena, Yann-Michel Niquet
Summary: This study discusses the electrical manipulation of hole spins in semiconductor heterostructures subject to inhomogeneous vertical electric fields and/or in-plane ac electric fields. The lack of separability between the vertical and in-plane motions gives rise to an additional spin-orbit coupling mechanism that modulates the principal axes of the hole gyromagnetic g matrix. This mechanism enables spin manipulation even in symmetric dots when the magnetic field is applied in the heterostructure's plane.
Article
Physics, Applied
Koichi Nakanishi, Ayuki Arikawa, Yasuhito Saito, Daisuke Iizasa, Satoshi Iba, Yuzo Ohno, Nobuhide Yokota, Makoto Kohda, Yoshihiro Ishitani, Ken Morita
Summary: The study reveals the unique out-of-plane and in-plane spin-orbit (SO) magnetic fields in slightly misoriented (110) InGaAs QWs, using spatially resolved diffusion-driven spin precession dynamics and a diagonally applied external magnetic field. Through the scan position dependence of the spin precession frequency induced by the SO magnetic field, simultaneous observations of the out-of-plane and in-plane components are achieved, with the Dresselhaus SO parameter extracted to be 1.9 x 10(-12) eV m.
APPLIED PHYSICS LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Liwei Jiang, Lihong Duan, Jiali Liu, Yixiang Liang, Wei Quan, Jiancheng Fang
Summary: In this study, the relaxation of alkali metal atoms in comagnetometers was systematically investigated, revealing that spin-exchange relaxation is not completely eliminated under normal operating conditions. Despite the presence of optical pumping, spin-exchange relaxation still plays a dominant role in broadening electron Zeeman resonances due to a large electron magnetic field. This study demonstrates the operation of alkali metal atoms in comagnetometers near the SERF regime with a large electron magnetic field, providing insights for reducing relaxation and improving sensitivity.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2021)
Article
Physics, Multidisciplinary
V. V. Belykh, A. R. Korotneva, D. R. Yakovlev
Summary: By simultaneously applying a radio frequency field and periodic optical pulses, this study successfully addresses the issue of inhomogeneity and fluctuating environment affecting the coherence time of an electron spin ensemble. The research resulted in a 50-Hz-narrow electron spin resonance with milliseconds-long T-2 in Ce3+ ions, paving the way for coherent optical manipulation in spin systems decoupled from their inhomogeneous environment.
PHYSICAL REVIEW LETTERS
(2021)
Article
Chemistry, Physical
Yannik Hinz, Joachim Beerwerth, Roland Boehmer
Summary: This research investigates the motion of chloride ions in glyceline using various nuclear magnetic resonance techniques and finds highly disordered coordination of anions. At higher temperatures, chloride ions are coupled with the structural units in glyceline, while at lower temperatures, the motion of anions becomes faster and the overall ionic conductivity displays a super-Arrhenius behavior, indicating dominant charge transport by cations rather than anions.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
F. L. Pratt, F. Lang, W. Steinhardt, S. Haravifard, S. J. Blundell
Summary: Electron spin dynamics in the triangular-lattice quantum spin-liquid candidate YbZnGaO4 was investigated, revealing no evidence for freezing or ordering of the Yb spins. The muon spin relaxation rate can be decomposed into two contributions, one dependent on longitudinal magnetic field and the other independent of field. The spin-diffusion rate follows the expected form for two-dimensional diffusion of mobile spin excitations, and reduces significantly in the low temperature quantum regime, attributed to the effect of quantum entanglement. Comparison with theory suggests that the nodal spin-liquid model U1A11 provides better agreement with experimental data.
Article
Chemistry, Physical
Yannik Hinz, Joachim Beerwerth, Roland Boehmer
Summary: This study examines the motions of Cl- within a glycerol: choline chloride solution using various nuclear magnetic resonance techniques. The results show that the chlorine ions are coupled to the glycerol and choline moieties at high temperatures, but become faster than the matrix molecules at lower temperatures. Furthermore, the charge transport is dominated by choline cations rather than Cl anions throughout the temperature range.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Xiangyu Hua, Fanbao Meng, Zongyao Huang, Zhaohang Li, Shuai Wang, Binghui Ge, Ziji Xiang, Xianhui Chen
Summary: Unconventional quantum states, including 2D superconductivity, have been observed at the interface between EuO (111) thin film and KTaO3 (KTO) (110) substrate. The superconductivity is 2D in nature and can be tuned by gate voltage. The enhancement of superconductivity may be related to the boosted spin-orbit energy. The analysis of upper critical field and magnetoconductance reveals the complex nature of spin-orbit coupling at the interface.
NPJ QUANTUM MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Long Ma, J. X. Li, L. S. Ling, Y. Y. Han, L. Zhang, L. Hu, W. Tong, C. Y. Xi, Li Pi
Summary: We conducted a nuclear magnetic resonance study on the spin correlations in the spin-cluster-based mineral Na2Cu3O(SO4)3, using magnetic fields ranging from 1 to 33 T. The study revealed the presence of long-range magnetic order, indicated by sudden spectral broadening at TN and critical slowing down behavior in the temperature dependence of spin-lattice relaxation rates [1/T1(T)]. A spin excitation gap was observed above & mu;0H = 7.25 T, as shown by the thermally activated temperature dependence of 1/T1. The linear field dependence of the gap size provided valuable information about the effective magnetic moment and the spin excitation spectrum in A2Cu3O(SO4)3.
Article
Biochemistry & Molecular Biology
Valerica Raicu
Summary: This paper presents the derivation of analytical expressions and investigates the distribution of electrical potentials and fields within different layers of a biological cell. The results show differences between the present theoretical model and previous models, as well as amplification of the electric field at the membrane level of cells and organelles.
BIOELECTROCHEMISTRY
(2022)
Article
Physics, Applied
S. Anghel, A. V. Poshakinskiy, K. Schiller, G. Yusa, T. Mano, T. Noda, M. Betz
Summary: This study investigates the correlation between spin diffusion, spin lifetime, and electron density in low-dimensional GaAs semiconductors. It reveals that the variation in the scattering rate with electron density is more important than fulfilling the persistent spin helix condition for achieving the longest spin lifetime. The experiment shows that the longest spin lifetime occurs at the transition from Boltzmann to Fermi-Dirac statistics for electron density.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Physics, Multidisciplinary
M. C. Cambria, A. Norambuena, H. T. Dinani, G. Thiering, A. Gardill, I. Kemeny, Y. Li, V. Lordi, A. Gali, J. R. Maze, S. Kolkowitz
Summary: In this study, measurements of spin-lattice relaxation of the nitrogen-vacancy (NV) center were conducted as a function of temperature from 9 to 474 K. It was found that the temperature dependence of the relaxation rates can be explained by a theory of Raman scattering due to second-order spin-phonon interactions. The study also suggests that the high-temperature behavior of NV spin-lattice relaxation is dominated by interactions with two groups of quasi-localized phonons.
PHYSICAL REVIEW LETTERS
(2023)
Article
Materials Science, Multidisciplinary
V. P. Mineev
Summary: The NMR measurements on a single orthorhombic crystal of superconducting ferromagnet UCoGe exhibited strong anisotropic magnetic properties. The calculations presented showed the dependence of longitudinal spin-lattice relaxation rate on temperature and magnetic field. It was found that the rate is field-dependent when the field is directed in the b-crystallographic direction, but field-independent when oriented along the a axis.
Article
Biochemistry & Molecular Biology
Pei Huang, Yingze Cao, Zhidong Xia, Pengfei Wang, Shaosong Chen
Summary: This study investigated the electrical resistance relaxation of anisotropic composites under an external electric field, finding that the deflection and migration of carbon fibers are the major reasons for resistance relaxation, while the increased temperature due to Joule heating effect also hinders the resistance relaxation.
Article
Chemistry, Multidisciplinary
Long Zhang, Yan Zhao, Yuqi Liu, Guoying Gao
Summary: In this study, the stability, electronic and magnetic properties of Janus MnSeTe and MnSTe monolayers under strain and carrier-doping were systematically explored using first-principles calculations and Monte Carlo simulations. It was found that both MnSeTe and MnSTe monolayers exhibit high spin polarization and improved Curie temperatures and magnetic anisotropy under reasonable strain and carrier-doping conditions.
