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We develop a theory of the local density of states (LDOS) of disordered superconductors, employing the non-linear sigma-model formalism and the renormalization-group framework. The theory takes into account the interplay of disorder and…

介观与纳米尺度物理 · 物理学 2016-08-09 I. S. Burmistrov , I. V. Gornyi , A. D. Mirlin

We use Scanning Gate Microscopy to study electron transport through an open, gate-defined resonator in a Ga(Al)As heterostructure. Raster-scanning the voltage-biased metallic tip above the resonator, we observe distinct conductance…

We discuss theoretically the local density of states (LDOS) of a graphene sheet hosting two distant adatoms located at the center of the hexagonal cells. By putting laterally a Scanning Tunneling Microscope (STM) tip over a carbon atom, two…

强关联电子 · 物理学 2014-11-25 A. C. Seridonio , K. Kristinsson , M. de Souza , F. M. Souza , L. H. Guessi , R. S. Machado , I. A. Shelykh

We investigate numerically the local density of states (LDOS) in the vicinity of a vortex core in a ferromagnetic superconductor. Specifically, we investigate how the LDOS is affected by the relative weight of the spin bands in terms of the…

超导电性 · 物理学 2009-11-13 Jacob Linder , Takehito Yokoyama , Asle Sudbø

The local density of states (LDOS) in a one-dimensional helical channel of finite length is studied within a Tomonaga-Luttinger model at zero temperature. Two particular cases of loop and Josephson junction geometries are considered. The…

介观与纳米尺度物理 · 物理学 2015-06-19 Yositake Takane

We explore correlations of inhomogeneous local density of states (LDoS) for impure superconductors with different symmetries of the order parameter (s-wave and d-wave) and different types of scatterers (elastic and magnetic impurities). It…

超导电性 · 物理学 2012-06-08 A. E. Koshelev , A. A. Varlamov

The local density of states (LDOS) around a magnetic impurity in high-Tc superconductors is studied using the two-dimensional t-J model with a realistic band structure. The order parameters are determined in a self-consistent way within the…

超导电性 · 物理学 2009-10-31 Hiroki Tsuchiura , Yukio Tanaka , Masao Ogata , Satoshi Kashiwaya

Using a Scanning Tunneling Microscope (STM), we investigate the Local Density of States (LDOS) of artificially fabricated normal metal nano-structures in contact with a superconductor. Very low temperature local spectroscopic measurements…

介观与纳米尺度物理 · 物理学 2015-06-25 W. Escoffier , C. Chapelier , F. Lefloch

Scanning gate microscopy images from measurements made in the vicinity of quantum point contacts were originally interpreted in terms of current flow. Some recent work has analytically connected the local density of states to conductance…

介观与纳米尺度物理 · 物理学 2017-12-22 Ousmane Ly , Rodolfo A. Jalabert , Steven Tomsovic , Dietmar Weinmann

Motivated by recent high-resolution scanning tunneling microscopy (STM) experiments in the quantum Hall regime both on massive two-dimensional electron gas and on graphene, we consider theoretically the disorder averaged nonlocal…

介观与纳米尺度物理 · 物理学 2011-04-04 T. Champel , S. Florens , M. E. Raikh

We analyze the local density of states (LDOS) of heterostructures consisting of alternating ferromagnet, $F$, and superconductor, $S$, layers. We consider structures of the $SFS$ and $SFSFSFS$ type, with thin nanometer scale $F$ and $S$…

超导电性 · 物理学 2009-11-10 Klaus Halterman , Oriol T. Valls

We numerically calculate the local density of states (LDOS) of a one-dimensional Mott insulator with open boundaries, which is modelled microscopically by a (extended) Hubbard chain at half filling. In the Fourier transform of the LDOS we…

强关联电子 · 物理学 2017-05-10 Benedikt Schoenauer , Peter Schmitteckert , Dirk Schuricht

The local density of states (LDOS) of the adsorbate induced two-dimensional electron system (2DES) on n-InAs(110) is studied by low-temperature scanning tunneling spectroscopy. In contrast to a similar 3DES, the 2DES LDOS exhibits 20 times…

无序系统与神经网络 · 物理学 2009-11-07 M. Morgenstern , J. Klijn , Chr. Meyer , R. A. Roemer , R. Wiesendanger

Motivated by high-accuracy scanning tunneling spectroscopy measurements on disordered two-dimensional electron gases in strong magnetic field, we present an exact solution for the local density of states (LDoS) of electrons moving in an…

介观与纳米尺度物理 · 物理学 2009-10-29 Thierry Champel , Serge Florens

The profiles of local density of states (LDOS) around different vortex configurations in mesoscopic superconductors are studied taking account of the interference of quasiparticle waves experiencing Andreev reflection within the vortex…

超导电性 · 物理学 2015-05-13 A. S. Mel'nikov , D. A. Ryzhov , M. A. Silaev

Local density of states (LDOS) in the triangular vortex lattice is investigated based on the quasi-classical Eilenberger theory. We consider the case of an isotropic s-wave superconductor with the material parameter appropriate to NbSe_2.…

超导电性 · 物理学 2016-08-31 Masanori Ichioka , Nobuhiko Hayashi , Kazushige Machida

In this Letter we discuss various properties of the local density of states (DOS) for a superconductor-ferromagnet hybrid system. The DOS is modified at small energies on both sides of the interface. Due to the interplay of…

凝聚态物理 · 物理学 2009-10-31 Rosario Fazio , Carlo Lucheroni

The probability distribution of the mesoscopic local density of states (LDOS) for a single-channel disordered quantum wire with chiral symmetry is computed in two different geometries. An approximate ansatz is proposed to describe the…

无序系统与神经网络 · 物理学 2009-11-10 S. Ryu , C. Mudry , A. Furusaki

The spatial variations of the order parameter, and the local density of states (LDOS) on the corner of s-wave or $d_{x^2-y^2}$-wave superconductors, as well as in superconductor-insulator-normal metal interfaces, are calculated self…

超导电性 · 物理学 2009-11-07 N. Stefanakis

We revealed that with the measurement of the scattering phase shift of electron in low-dimensional or mesoscopic systems local objects of hierarchy of density of states can also determine experimentally. In recent times, it has been…

介观与纳米尺度物理 · 物理学 2025-03-11 Kanchan Meena , P. Singha Deo
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