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We present a numerical study of the quasi-particle density of states (DoS) of two-dimensional d-wave superconductors in the presence of smooth disorder. We find power law scaling of the DoS with an exponent depending on the strength of the…

介观与纳米尺度物理 · 物理学 2007-05-23 Bodo Huckestein , Alexander Altland

We demonstrate that discrepancies between predicted low-energy quasiparticle properties in disordered 2D d-wave superconductors occur because of the unanticipated importance of disorder model details and normal-state particle-hole symmetry.…

超导电性 · 物理学 2009-10-31 W. A. Atkinson , P. J. Hirschfeld , A. H. MacDonald , K. Ziegler

The effect of short-range disorder in nodal line semimetals is studied by numerically exact means. For arbitrary small disorder, a novel semimetallic phase is unveiled for which the momentum-space amplitude of the ground-state wave function…

无序系统与神经网络 · 物理学 2020-04-08 Miguel Gonçalves , Pedro Ribeiro , Eduardo V. Castro , Miguel A. N. Araújo

We study the effect of disorder in systems having a non-trivial Euler class. As these recently proposed multi-gap topological phases come about by braiding non-Abelian charged band nodes residing between different bands to induce stable…

介观与纳米尺度物理 · 物理学 2024-08-08 Wojciech J. Jankowski , Mohammadreza Noormandipour , Adrien Bouhon , Robert-Jan Slager

We consider the effect of disorder on the spectrum of quasiparticles in the point-node and nodal-line superconductors. Due to the anisotropic dispersion of quasiparticles disorder scattering may render the Hamiltonian describing these…

超导电性 · 物理学 2019-05-08 Alexander A. Zyuzin , Pascal Simon

We explore the effects of various kinds of random disorder on the quasiparticle density of states of two-dimensional d-wave superconductors using an exact real-space method, incorporating realistic details known about the cuprates. Random…

超导电性 · 物理学 2018-04-19 Miguel Antonio Sulangi , Jan Zaanen

We present a numerical study of the quasi-particle density of states (DoS) of two-dimensional d-wave superconductors in the presence of disorder, focusing on the influence of the range of the disorder. We find qualitatively different…

介观与纳米尺度物理 · 物理学 2009-11-07 Bodo Huckestein , Alexander Altland

We study spin density wave quantum critical points in two dimensional metals with a quenched disorder potential coupling to the electron density. Adopting an $\epsilon$-expansion around three spatial dimensions, where both disorder and the…

强关联电子 · 物理学 2021-06-30 Johannes Halbinger , Matthias Punk

We study the effect of disorder on hardcore bosons in two dimensions at the SU(2) symmetric ``Heisenberg point''. We obtain our results with quantum Monte Carlo simulations using the directed loop algorithm. In the absence of disorder, the…

统计力学 · 物理学 2007-05-23 Ji-Woo Lee , Shailesh Chandrasekharan , Harold U. Baranger

We study the order parameter of a quasi-2D gas of ultracold atoms trapped in an optical potential in the presence of controllable disorder. Our results show that disorder drives phase fluctuations without significantly affecting the…

量子气体 · 物理学 2012-09-03 M. C. Beeler , M. E. W. Reed , T. Hong , S. L. Rolston

Three dimensional Dirac semimetals are stable against weak potential disorder, but not against strong disorder. In the language of renormalization group, such stability stems from the irrelevance of weak disorder in the vicinity of the…

无序系统与神经网络 · 物理学 2015-01-08 Bitan Roy , S. Das Sarma

The interrelation between disorder and interactions in two dimensional electron liquid is studied beyond weak coupling perturbation theory. Strong repulsion significantly reduces the electronic density of states on the Fermi level. This…

无序系统与神经网络 · 物理学 2007-05-23 B. Rosenstein , Tran Minh-Tien

We study the effects of disorder on strongly coupled compressible matter in 2+1 dimensions. Our system consists of a D3/D5 intersection at finite temperature and in the presence of a disordered chemical potential. We first study the impact…

高能物理 - 理论 · 物理学 2016-08-24 Mario Araujo , Daniel Arean , Javier M. Lizana

Typically the superconducting phase weakens at several points with the increase in disorder before it is distroyed in the 2d-thin films. This may lead to an inhomogeneous superconducting state without a continuous phase. Here we present…

超导电性 · 物理学 2015-08-19 P. Kulkarni , S. Vieira , J. Rodrigo , M. R. Baklanov , T. Baturina , V. Vinokur

We present a quasi-particle model that allows for a simple description of the electronic properties of metallic helimagnets. For weak quenched disorder, we find a leading linear temperature dependence of the electrical conductivity for 3-d…

强关联电子 · 物理学 2009-11-13 T. R. Kirkpatrick , D. Belitz , Ronojoy Saha

Observing how electronic states in solids react to a local symmetry breaking provides insight into their microscopic nature. A striking example is the formation of bound states when quasiparticles are scattered off defects. This is known to…

Quasiparticles in the cuprates appear to be subject to anomalously strong inelastic damping mechanisms. To explain the phenomenon, Sachdev and collaborators recently proposed to couple the system to a critically fluctuating order parameter…

超导电性 · 物理学 2009-11-07 Julia S. Meyer , Igor V. Gornyi , Alexander Altland

To obtain the total response of the system, the effect of disorder cannot be neglected, as it introduces a new contribution (i.e. extrinsic) in the total response of the system. In the study of dynamical (AC) effects, the interband response…

介观与纳米尺度物理 · 物理学 2025-07-02 Vivek Pandey , Pankaj Bhalla

We investigate numerically the quasiparticle density of states $\varrho(E)$ for a two-dimensional, disordered superconductor in which both time-reversal and spin-rotation symmetry are broken. As a generic single-particle description of this…

介观与纳米尺度物理 · 物理学 2007-06-20 A. Mildenberger , F. Evers , A. D. Mirlin , J. T. Chalker

Using a large-N approach, we study the effect of disorder in the Kondo-screened phase of heavy-fermion materials. We demonstrate that the strong feedback between the hybridization and the conduction electron charge density magnifies the…

强关联电子 · 物理学 2013-10-30 Francesco Parisen Toldin , Jeremy Figgins , Stefan Kirchner , Dirk K. Morr
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