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We develop a theory for spin transport and magnetization dynamics in a quantum-dot spin valve, i.e., two magnetic reservoirs coupled to a quantum dot. Our theory is able to take into account effects of strong correlations. We demonstrate…

Mesoscale and Nanoscale Physics · Physics 2018-01-09 N. M. Gergs , S. A. Bender , R. A. Duine , D. Schuricht

We have studied the spin transport characteristics of a spin metal-oxide-semiconductor field-effect transistor (spin MOSFET), particularly the bias voltage dependence of the electron spin polarization P_S in Si and the magnetoresistance…

Mesoscale and Nanoscale Physics · Physics 2025-09-09 Shoichi Sato , Masaaki Tanaka , Ryosho Nakane

For an electron density near the H=0 insulator-to-conductor transition, the magnetoconductivity of the low-temperature conducting phase in high-mobility silicon MOSFETs is consistent with the form…

Disordered Systems and Neural Networks · Physics 2007-05-23 D. Simonian , S. V. Kravchenko , M. P. Sarachik , V. M. Pudalov

In this study, we present first-principles calculations that introduce a novel nonvolatile spin field-effect transistor (Spin-FET) utilizing a van der Waals multiferroic heterostructure, specifically VSi2N4/Sc2CO2. We demonstrate that…

Mesoscale and Nanoscale Physics · Physics 2024-05-07 Xian Zhang , Bang Liu , Junsheng Huang , Xinwei Cao , Yunzhe Zhang , Zhi-Xin Guo

The silicon (Si) based spin-MOSFET (metal-oxide semiconductor field-effect transistor) is considered to be the building block of low-power-consumption electronics, utilizing spin-degrees of freedom in semiconductor devices. In this paper,…

Mesoscale and Nanoscale Physics · Physics 2018-12-27 Duong Dinh Hiep , Masaaki Tanaka , Pham Nam Hai

In a recent Letter, Kravchenko et al. [cond-mat/9608101] have provided evidence for a metal-insulator transition (MIT) in a two-dimensional electron system (2DES) in Si metal-oxide-semiconductor field-effect transistors (MOSFETs). The…

Strongly Correlated Electrons · Physics 2008-02-03 K. Ismail , J. O. Chu , Dragana Popovic , A. B. Fowler , S. Washburn

Current generated spin polarization in topological insulator (TI) surface states due to spin-momentum locking has been detected recently using ferromagnet/tunnel barrier contacts, where the projection of the TI spin onto the magnetization…

Mesoscale and Nanoscale Physics · Physics 2019-04-19 Connie H. Li , Olaf M. J. van t Erve , Chenhui Yan , Lian Li , Berry T. Jonker

We propose and numerically simulate novel reconfigurable logic gates employing spin metal-oxide-semiconductor field-effect transistors (spin MOSFETs). The output characteristics of the spin MOSFETs depend on the relative magnetization…

Materials Science · Physics 2007-05-23 Satoshi Sugahara , Tomohiro Matsuno , Masaaki Tanaka

We obtain analytic formulas for the frequency-dependent spin-Hall conductivity of a two-dimensional electron gas (2DEG) in the presence of impurities, linear spin-orbit Rashba interaction, and external magnetic field perpendicular to the…

Mesoscale and Nanoscale Physics · Physics 2009-11-13 E. M. Hankiewicz , G. Vignale

We argue that claims about magnetic field dependence of the magnetic field penetration depth lambda, which were made on the basis of moun-spin-rotation studies of some superconductors, originate from insufficient accuracy of theoretical…

Superconductivity · Physics 2009-11-13 I. L. Landau , H. Keller

In mesoscopic systems with spin-orbit coupling, spin-injection into quantum dots at zero magnetic field is expected under a wide range of conditions. However, up to now, a viable approach for experimentally identifying such injection has…

Mesoscale and Nanoscale Physics · Physics 2013-05-29 Mark S. Rudner , Emmanuel I. Rashba

We report measurements on a Si-MOSFET sample with a slot in the upper gate, allowing for different electron densities n_{1,2} across the slot. The dynamic longitudinal resistance was measured by the standard lock-in technique, while…

Mesoscale and Nanoscale Physics · Physics 2009-12-01 I. Shlimak , D. I. Golosov , A. Butenko , K. -J. Friedland , S. V. Kravchenko

We present detailed simulations addressing recent electronic interference experiments, where a metallic gate is used to locally modify the Fermi wave-length of the charge carriers. Our numerical calculations are based on a solution of the…

Mesoscale and Nanoscale Physics · Physics 2009-10-31 A. P. Jauho , K. N. Pichugin , A. F. Sadreev

It was proposed that a double quantum dot can be used to be a detector of spin bias. Electron transport through a double quantum dot is investigated theoretically when a pure spin bias is applied on two conducting leads contacted to the…

Mesoscale and Nanoscale Physics · Physics 2009-11-13 Qing-feng Sun , Yanxia Xing , Shun-Qing Shen

The electrical and thermo-electrical transport effects of the TaAs$_2$ semimetal were measured in a magnetic field applied along [-2 0 1] direction. The resulting field dependences of the resistivity as well as the Hall, Seebeck and Nernst…

We examine transport through a quantum dot coupled to three ferromagnetic leads in the regime of weak tunnel coupling. A finite source-drain voltage generates a nonequilibrium spin on the otherwise non-magnetic quantum dot. This spin…

Mesoscale and Nanoscale Physics · Physics 2007-09-28 Daniel Urban , Matthias Braun , Jürgen König

Two-dimensional material (2DM)-based field-effect transistors (FETs), such as molybdenum disulfide (MoS${_2}$)-FETs, have gained significant attention for their potential for ultra-short channels, thereby extending Moore's law. However,…

We report on a way to manipulate the spin transport through double-stranded DNA contacted by normal-metal electrodes. On the basis of an effective model Hamiltonian, the conductance and the spin polarization are calculated in the presence…

Mesoscale and Nanoscale Physics · Physics 2015-06-22 Ai-Min Guo , Qing-feng Sun

The Hall conductivity in the magnetic-field-induced spin-density-wave (FISDW) state of the quasi-one-dimensional organic conductors (TMTSF)$_2$X at a finite temperature is calculated. The temperature dependence of the Hall conductivity is…

Condensed Matter · Physics 2007-05-23 Hsi-Sheng Goan , Victor M. Yakovenko

We present a scaling theory of two-dimensional (2D) field effect transistors (FETs). For devices with channel thickness less than 4 nm, the device electrostatics is dominated by the physical gate oxide thickness and not the effective oxide…

Mesoscale and Nanoscale Physics · Physics 2021-05-25 Saurabh V. Suryavanshi , Chris D. English , H. -S. P. Wong , Eric Pop