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The contribution of gravitational wave (tensor metric) and energy density (scalar metric) fluctuations to the cosmic microwave background polarization is computed by numerically solving the relativistic radiation transfer equations. We find…

天体物理学 · 物理学 2009-10-22 Robert Crittenden , Richard L. Davis , Paul J. Steinhardt

Conversion of thermal energy into magnonic spin currents and/or effective electric polarization promises new device functionalities. A versatile approach is presented here for generating and controlling open circuit magnonic spin currents…

介观与纳米尺度物理 · 物理学 2018-04-04 Xi-guang Wang , L. Chotorlishvili , Guang-hua Guo , J. Berakdar

Polarized neutron diffraction experiments have been performed on multiferroic materials $R$Mn$_{2}$O$_{5}$ ($R=$Ho, Er) under electric fields in the ferroelectric commensurate (CM) and the low-temperature incommensurate (LT-ICM) phases,…

强关联电子 · 物理学 2015-05-13 S. Wakimoto , H. Kimura , M. Fukunaga , K. Nishihata , M. Takeda , K. Kakurai , Y. Noda , Y. Tokura

Fractionally charged elementary excitations, the quasi-electron and quasi-hole, are one of the hallmarks of the fractional Chern insulator (FCI). In this work, we observe that spontaneous spin polarization in twisted MoTe$_2$ leads to…

A novel method invented to measure the minute thermodynamic spin magnetization of dilute two dimensional fermions is applied to electrons in a silicon inversion layer. Interplay between the ferromagnetic interaction and disorder enhances…

介观与纳米尺度物理 · 物理学 2009-11-07 O. Prus , Y. Yaish , M. Reznikov , U. Sivan , V. Pudalov

Effects of an open surface on a magnetic Chern insulator are investigated in comparison with those of an interface to a capping magnetic layer. In magnets, an open surface often perturbs the magnetic order by a reconstruction of the…

强关联电子 · 物理学 2015-06-23 Ryo Ozawa , Masafumi Udagawa , Yutaka Akagi , Yukitoshi Motome

These lectures introduce some of the basic theory of cosmic microwave background (CMB) polarization with the primary aim of developing the theory of CMB polarization from inflationary gravitational waves, as well as some of the related…

天体物理学 · 物理学 2007-05-23 Paolo Cabella , Marc Kamionkowski

Coupling of the spin and orbital degrees of freedom on the surface of a strong three-dimensional insulator, on the one hand, and textured magnetic configuration in an adjacent ferromagnetic film, on the other, is studied using a combination…

介观与纳米尺度物理 · 物理学 2015-06-23 Yaroslav Tserkovnyak , D. A. Pesin , Daniel Loss

Polarizability tensor of a strongly magnetized plasma and the polarization vectors and opacities of normal electromagnetic waves are studied for the conditions typical of neutron star atmospheres, taking account of partial ionization…

天体物理学 · 物理学 2009-11-10 A. Y. Potekhin , Dong Lai , G. Chabrier , W. C. G. Ho

In this paper, we study the magnetic orders of two dimensional correlated topological insulators including the correlated Chern insulator and the correlated Z2 topological insulator at finite temperature. For the 2D correlated Chern…

强关联电子 · 物理学 2013-09-24 Ying-Xue Zhu , Jing He , Chun-Li Zang , Ying Liang , Su-Peng Kou

We propose a hole-induced mechanism of spin-polarized current generation by circularly polarized synchrotron radiation and corresponding induced magnetization in magnetically-doped topological insulators…

In this paper, the Cherenkov radiation process is investigated in the frame of the Quantum Field Theory, both for the spinless and spin-1/2 charged particles. In the latter case, the polarization density matrix technique was used to account…

高能物理 - 唯象学 · 物理学 2015-11-18 Stanislav Iablokov

We have performed simultaneous measurements of magnetic chirality by using polarized neutrons and electric polarization along the b-axis of single crystals of YMn$^{4+}$(Mn$_{1-x}$Ga$_{x}$)$^{3+}$O$_{5}$ with $x=0.047$ and 0.12, in which…

材料科学 · 物理学 2015-06-17 S. Wakimoto , H. Kimura , Y. Sakamoto , M. Fukunaga , Y. Noda , M. Takeda , K. Kakurai

We have obtained general expressions for the intensity of radiation, decelerating force, the rate of heating and acceleration of a small polarizable particle under the conditions of Cherenkov friction: at relativistic motion parallel to the…

介观与纳米尺度物理 · 物理学 2017-08-04 G. V. Dedkov , A. A. Kyasov

Using the semiclassical theory of electron dynamics, we derive a gauge-invariant expression for the spin toroidization in a periodical crystal. We show that the spin toroidization is comprised of two contributions: one is due to the…

介观与纳米尺度物理 · 物理学 2018-05-02 Yang Gao , David Vanderbilt , Di Xiao

The dipole moment of any finite and neutral system, having a square-integrable wavefunction, is a well defined quantity. The same quantity is ill-defined for an extended system, whose wavefunction invariably obeys periodic (Born-von Karman)…

材料科学 · 物理学 2007-05-23 Raffaele Resta

Cherenkov radiation produced in Extensive Air Showers shows a net polarization. This article discusses its properties and physical origin, and proposes an arrangement of polarizers potentially useful for Imaging Atmospheric Cherenkov…

天体物理学 · 物理学 2014-10-13 I. de la Calle , J. L. Contreras , J. Cortina , V. Fonseca

The magnetization of a system of many mesoscopic rings under non-equilibrium conditions is considered. The corresponding disorder-averaged current in a ring is shown to be a sum of the `thermodynamic' and `kinetic' contributions both…

介观与纳米尺度物理 · 物理学 2009-11-07 O. L. Chalaev , V. E. Kravtsov

A non-commutative formula for the isotropic magneto-electric response of disordered insulators under magnetic fields is derived using the methods of non-commutative geometry. Our result follows from an explicit evaluation of the Ito…

数学物理 · 物理学 2013-02-12 Bryan Leung , Emil Prodan

We demonstrate the existence of Giant proximity magnetoresistance (PMR) effect in a graphene spin valve where spin polarization is induced by a nearby magnetic insulator. PMR calculations were performed for yttrium iron garnet (YIG), cobalt…

介观与纳米尺度物理 · 物理学 2019-09-05 D. A. Solis , A. Hallal , X. Waintal , M. Chshiev