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We demonstrate dynamical nuclear spin polarization in the absence of an external magnetic field, by resonant circularly polarized optical excitation of a single electron or hole charged quantum dot. Optical pumping of the electron spin…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 C. W. Lai , P. Maletinsky , A. Badolato , A. Imamoglu

The nonlinear Hall effect (NLHE) has been detected in various of condensed matter systems. Unlike linear Hall effect, NLHE may exist in physical systems with broken inversion symmetry in the crystal. On the other hand, real space spin…

Strongly Correlated Electrons · Physics 2024-10-15 Wen-Tao Hou , Jiadong Zang

We study the three-dimensional Kasteleyn transition in both nearest neighbours and dipolar spin ice models using an algorithm that conserves the number of excitations. We first limit the interactions range to nearest neighbours to test the…

Strongly Correlated Electrons · Physics 2017-01-04 M. L. Baez , R. A. Borzi

Motivated by recent experiments on Ba$_3$Cr$_2$O$_8$, we propose a theory describing low-temperature properties in magnetic field $h$ of dimer spin-$\frac12$ systems on a stacked triangular lattice with spatially anisotropic exchange…

Strongly Correlated Electrons · Physics 2014-05-06 O. I. Utesov , A. V. Syromyatnikov

We propose a very sensitive method for measuring the electric dipole moment of the electron using polar molecules embedded in a cryogenic solid matrix of inert-gas atoms. The polar molecules can be oriented in the $\hat{\rm{z}}$ direction…

Atomic Physics · Physics 2018-01-29 A. C. Vutha , M. Horbatsch , E. A. Hessels

We demonstrate that spin-orbit coupled states are generated in neutral magnetic spin 1/2 particles travelling through an electric field. The quantization axis of the orbital angular momentum is parallel to the electric field, hence both…

Quantum Physics · Physics 2021-02-17 Niels Geerits , Stephan Sponar

Electron electric dipole moment (eEDM) search using lasercoolable triatomics like YbOH is one of the most sensitive probes for physics beyond the Standard Model. The eEDM-induced energy shift is proportional to polarization ($P$) of the…

Atomic Physics · Physics 2022-06-07 Alexander Petrov , Anna Zakharova

We study the doping evolution of spin excitations in a 1D Hubbard model and its downfolded spin Hamiltonians, by using exact diagonalization combined with cluster perturbation theory. In all models, we observe hardening (softening) of spin…

Strongly Correlated Electrons · Physics 2019-05-08 Ekaterina M. Pärschke , Yao Wang , Brian Moritz , Thomas P. Devereaux , Cheng-Chien Chen , Krzysztof Wohlfeld

Spin-echo experiments are reported for 3He-4He solutions under extremely high B/T conditions, B=14.75 T and T >= 1.73 mK. The 3He concentration x_3 was adjusted close to the value x_c = 3.8% at which the spin rotation parameter muM_0…

Condensed Matter · Physics 2009-11-07 H. Akimoto , D. Candela , J. S. Xia , W. J. Mullin , E. D. Adams , N. S. Sullivan

We demonstrate theoretically the existence of a linear dc Stark shift of the individual substates of an alkali atom in its ground state, dressed by a circularly polarized laser field. It arises from the electroweak nuclear anapole moment…

Atomic Physics · Physics 2008-11-26 Marie-Anne Bouchiat

The role of nuclear spin fluctuations in the dynamic polarization of nuclear spins by electrons is investigated in (In,Ga)As quantum dots. The photoluminescence polarization under circularly polarized optical pumping in transverse magnetic…

We study the coupling between collective variables of atomic spin and light polarization in an ensemble of cold 87Rb probed with polarized light. The effects of multiple hyperfine levels manifest themselves as a rank-2 tensor…

Quantum Physics · Physics 2008-03-12 S. R. de Echaniz , M. Koschorreck , M. Napolitano , M. Kubasik , M. W. Mitchell

Measurement of a non-zero electric dipole moment (EDM) of the electron within a few orders of magnitude of the current best limit of |d_e| < 1.05 e -27 e cm would be an indication of physics beyond the Standard Model. The ACME Collaboration…

Optical orientation of electron and hole spins by circularly polarized light is investigated for MAPbI$_3$ single crystals. The Hanle and polarization recovery effects measured in transverse and longitudinal magnetic fields, respectively,…

Mesoscale and Nanoscale Physics · Physics 2026-02-10 Mladen Kotur , Nataliia E. Kopteva , Dmitri R. Yakovlev , Bekir Turedi , Maksym V. Kovalenko , Manfred Bayer

The propagation invariance of Bessel beams as well as their transversal structure are used to perform a comparative analysis of their effect on cold atoms for four different configurations and combinations thereof. We show that, even at…

Atomic Physics · Physics 2009-11-13 K. Volke-Sepulveda , R. Jauregui

We compute the electric spin susceptibility of Bloch electrons with spin-orbit coupling to second order. We find that it is possible to generate a nonequilibrium spin polarization in the bulk of non-magnetic inversion-symmetric materials…

Mesoscale and Nanoscale Physics · Physics 2022-11-07 Benjamin M. Fregoso

We evaluate the non-equilibrium spin polarization induced by an applied electric field for a tight-binding model of electron states at oxides interfaces in LAO/STO heterostructures. By a combination of analytic and numerical approaches we…

Mesoscale and Nanoscale Physics · Physics 2018-08-29 Goetz Seibold , Sergio Caprara , Roberto Raimondi

We report on the search for a CPT and Lorentz invariance violating coupling of the 3He and 129Xe nuclear spins (each largely determined by a valence neutron) to background tensor fields which permeate the universe. Our experimental approach…

General Relativity and Quantum Cosmology · Physics 2014-03-26 F. Allmendinger , W. Heil , S. Karpuk , W. Kilian , A. Scharth , U. Schmidt , A. Schnabel , Yu. Sobolev , K. Tullney

The proposed method exploits charged particles confined as a storage ring beam (proton, deuteron, possibly $^3$He) to search for an intrinsic electric dipole moment (EDM) aligned along the particle spin axis. Statistical sensitivities could…

We report theoretical calculations of the normal-state spin diffusion coefficient of 3He in aerogel, including both elastic and inelastic scattering of 3He quasiparticles, and compare these results with experimental data for 3He in 98%…

Superconductivity · Physics 2009-02-13 J. A. Sauls , Yu. M. Bunkov , E. Collin , H. Godfrin , P. Sharma