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Effect of the spin-involved interaction of electrons with impurity atoms or defects to the transport properties of a two-dimensional electron gas is described by using a simplifying two-component model. Components representing spin-up and…

凝聚态物理 · 物理学 2007-05-23 P. Seba , P. Exner , K. N. Pichugin , P. Streda

We consider a holographic model with the charge current dual to a general nonlinear electrodynamics (NLED) field. Taking into account the backreaction of the NLED field on the geometry and introducing axionic scalars to generate momentum…

高能物理 - 理论 · 物理学 2019-01-30 Peng Wang , Houwen Wu , Haitang Yang

Electronic structure calculations were performed on the compound CoS$_2$, an itinerant ferromagnet whose magnetic properties can be understood in terms of spin fluctuation theory. We have identified nesting features in the Fermi surface of…

强关联电子 · 物理学 2010-12-15 A. Piñeiro , A. S. Botana , V. Pardo , D. Baldomir

Decoherence is an undesirable, but ubiquitous phenomenon in quantum systems. Here, we study the effect of partial decoherence, induced via a B\"uttiker probe, on two-terminal electronic transport across one-dimensional quantum wires and…

介观与纳米尺度物理 · 物理学 2024-10-15 Abhiram Soori , Udit Khanna

We study a tight binding model including both on site disorder and coupling of the electrons to randomly oriented magnetic moments. The transport properties are calculated via the Kubo-Greenwood scheme, using the exact eigenstates of the…

无序系统与神经网络 · 物理学 2009-11-11 Sanjeev Kumar , Pinaki Majumdar

We numerically simulate the low-energy properties of interacting electrons in a random potential using the Hartree-Fock based exact diagonalization method. In particular, we investigate how the transport properties are influenced by the…

无序系统与神经网络 · 物理学 2009-11-07 Frank Epperlein , Svetlana Kilina , Michael Schreiber , Sergey Uldanov , Thomas Vojta

The electron-transport properties of single-row monoatomic nanowires made of 5$d$ elements are examined by first-principles calculations based on the density functional theory. We found that oscillation patterns with a period longer than…

材料科学 · 物理学 2008-05-06 Tomoya Ono

We investigate the electronic transport properties of semiconducting ($m$,$n$) carbon nanotubes (CNTs) on the mesoscopic length scale with arbitrarily distributed realistic defects. The study is done by performing quantum transport…

介观与纳米尺度物理 · 物理学 2018-11-26 Fabian Teichert , Andreas Zienert , Jörg Schuster , Michael Schreiber

The low-field electron mobility in rectangular silicon nanowire (SiNW) transistors was computed using a self-consistent Poisson-Schr\"{o}dinger-Monte Carlo solver. The behavior of the phonon-limited and surface-roughness-limited components…

材料科学 · 物理学 2016-11-17 E. B. Ramayya , D. Vasileska , S. M. Goodnick , I. Knezevic

We propose that the normal-state transport in the cuprate superconductors can be understood in terms of a two-fluid model of spinons and holons. In our scenario, the resistivity is determined by the properties of the holons while…

强关联电子 · 物理学 2009-10-28 Derek K. K. Lee , Patrick A. Lee

We analyze the effect of low dimensionality on the electrical conductivity ({\sigma}) and Seebeck coefficient (S) in ultra-narrow Si nanowires (NWs) by employing atomistic considerations for the electronic structures and linearized…

材料科学 · 物理学 2015-06-16 Neophytos Neophytou , Hans Kosina

The thermal conductance by phonons of a quasi-one-dimensional solid with isotope or defect scattering is studied using the Landauer formalism for thermal transport. The conductance shows a crossover from localized to Ohmic behavior, just as…

无序系统与神经网络 · 物理学 2009-11-13 P. G. Murphy , J. E. Moore

We predict that superconducting particles will show an apparent increase in thickness at low temperatures when measured by electron holography. This will result not from a real thickness increase, rather from an increase in the mean inner…

超导电性 · 物理学 2013-06-18 J. E. Hirsch

We describe the effects of phase coherence on transport and thermodynamic properties of a disordered conducting network. In analogy with weak-localization correction, we calculate the phase coherence contribution to the magnetic response of…

介观与纳米尺度物理 · 物理学 2017-02-08 Michael Pascaud , Gilles Montambaux

We consider magnetotransport on a helical edge of a quantum spin Hall insulator, in the presence of bulk midgap states ``side-coupled" to the edge. In the presence of a magnetic field, the midgap levels are spin-split, and hybridization of…

介观与纳米尺度物理 · 物理学 2023-02-27 Youjian Chen , Wenjin Zhao , Elliott Runburg , David Cobden , D. A. Pesin

We present a study of the effects of inelastic scattering on the transport properties of various nanoscale devices, namely H$_2$ molecules sandwiched between Pt contacts, and a spin-valve made by an organic molecule attached to model…

介观与纳米尺度物理 · 物理学 2007-05-23 N. Jean , S. Sanvito

We report on a variety of quantum transport experiments in SnTe nanowire devices. Research on these particular nanowire devices is relevant because of their topological properties and their potential to distinguish surface states owing to…

We investigate the electronic dispersion and transport properties of graphene/WSe$_{2}$ heterostructures in the presence of a proximity induced spin-orbit coupling (SOC) using a low-energy Hamiltonian, with different types of symmetry…

介观与纳米尺度物理 · 物理学 2023-07-07 M. Zubair , P. Vasilopoulos , M. Tahir

We investigate the influence of electron-electron interactions on the conductance of two-dimensional disordered spinless electrons. By using an efficient numerical method which is based on exact diagonalization in a truncated basis of…

强关联电子 · 物理学 2009-10-31 Thomas Vojta , Frank Epperlein , Michael Schreiber

We explore various aspects of magneto-conductance oscillations in semiconductor nanowires, developing quantum transport models based on the non-equilibrium Green's function formalism. In the clean case, Aharonov-Bohm (AB - h/e) oscillations…

介观与纳米尺度物理 · 物理学 2018-09-26 Aritra Lahiri , Kaveh Gharavi , Jonathan Baugh , Bhaskaran Muralidharan