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Electrical magnetoresistance and tunnel diode oscillator measurements were performed under external magnetic fields up to 41 T applied along the crystallographic b-axis (hard axis) of UTe$_2$ as a function of temperature and applied…

We investigate transport through ionic liquid gated field effect transistors (FETs) based on exfoliated crystals of semiconducting WS$_2$. Upon electron accumulation, at surface densities close to -or just larger than- 10$^{14}$ cm$^{-2}$,…

Mesoscale and Nanoscale Physics · Physics 2015-01-27 Sanghyun Jo , Davide Costanzo , Helmuth Berger , Alberto F. Morpurgo

Magnetoconductivity of the disordered two- and three-dimensional superconductors is addressed at the onset of superconducting transition. In this regime transport is dominated by the fluctuation effects and we account for the interaction…

Superconductivity · Physics 2015-05-13 Alex Levchenko

The supersymmetry technique [A. V. Kolesnikov and K. B. Efetov, Phys. Rev. Lett. 83, 3689 (1999)] predicts a two-scale behavior of wavefunction decay in disordered wires in the crossover regime from preserved to broken time-reversal…

Disordered Systems and Neural Networks · Physics 2007-05-23 H. Schomerus , C. W. J. Beenakker

The infuence of the conduction-electron spin magnetization density, induced in a two-dimensional electron layer by a microwave electromagnetic field, on the rejection and transmission of the field is considered. Because of the induced…

Mesoscale and Nanoscale Physics · Physics 2016-06-29 Victor M. Edelstein

The existence of multiple superconducting phases induced by either pressure or magnetic field is one of the most striking features of superconductivity of UTe$_2$, among the many unusual superconducting properties of this system. Here we…

Strongly Correlated Electrons · Physics 2024-10-24 T. Vasina , D. Aoki , A. Miyake , G. Seyfarth , A. Pourret , C. Marcenat , M. Amano Patino , G. Lapertot , J. Flouquet , J. -P. Brison , D. Braithwaite , G. Knebel

Localization phenomenon is an important research field in condensed matter physics. However, due to the complexity and subtlety of disordered syestems, new localization phenomena always emerge unexpectedly. For example, it is generally…

Disordered Systems and Neural Networks · Physics 2024-07-16 Tong Liu , Xingbo Wei , Youguo Wang

We have studied the interaction between magnetism and superconductivity in a pseudo-spin-valve structure consisting of a Co/Cu/Py/Nb layer sequence. We are able to control the magnetization reversal process and monitor it by means of the…

Superconductivity · Physics 2012-02-06 A. K. Suszka , F. S. Bergeret , A. Berger

A random-matrix theory is presented which shows that breaking time-reversal symmetry by itself does {\em not} suppress the weak-localization correction to the conductance of a disordered metal wire attached to a superconductor. Suppression…

Condensed Matter · Physics 2007-05-23 P. W. Brouwer , C. W. J. Beenakker

The propagation of a nonlinear stationary thermomagnetic wave in superconducting media is qualitatively analyzed in view of the effect of an external magnetic field. The velocity and the thickness of the wave front are estimated. It is…

Superconductivity · Physics 2007-05-23 Nizam A. Taylanov

Thermally induced magnetization dynamics is currently a flourishing field of research due to its potential application in information technology. We study the paradigmatic system of a magnetic domain wall in a thermal gradient which is…

Superconductivity · Physics 2022-02-08 I. V. Bobkova , A. M. Bobkov , Wolfgang Belzig

An ultradense 2D electron system can be realized by adsorbing PH$_3$ precursor molecules onto an atomically clean Si surface, followed by epitaxial Si overgrowth. By controlling the PH$_3$ coverage the carrier density of such system can…

Condensed Matter · Physics 2007-05-23 M. A. Zudov , C. L. Yang , R. R. Du , T. -C. Shen , J. -Y. Ji , J. S. Kline , J. R. Tucker

In diluted magnetic semiconductors, the carrier concentration and the magnetization of local moments are strongly coupled, since the magnetic interaction is mediated by the carriers. It is predicted that this coupling leads to an electric…

Materials Science · Physics 2009-11-11 Carsten Timm

We observe a new type of magneto-oscillations in the photovoltage and the longitudinal resistance of a two-dimensional electron system. The oscillations are induced by microwave irradiation and are periodic in magnetic field. The period is…

Mesoscale and Nanoscale Physics · Physics 2009-11-10 I. V. Kukushkin , M. Yu. Akimov , J. H. Smet , S. A. Mikhailov , K. von Klitzing , I. L. Aleiner , V. I. Falko

The authors of a recent Letter [Phys. Rev. Lett. 97, 137001 (2006)] observed enhancement of the critical supercurrent of superconducting nanowires in external magnetic field. They attributed the obtained behavior to the presence of magnetic…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 Maxim Yu. Kharitonov , Mikhail V. Feigel'man

The superconducting transition in the layered organic compound \alpha-(BEDT-TTF)_2KHg(SCN)_4 has been studied in the two hydrostatic pressure regimes where a charge-density wave is either present or completely suppressed. Within the…

Superconductivity · Physics 2016-08-31 D. Andres , M. V. Kartsovnik , W. Biberacher , K. Neumaier , E. Schuberth , H. Mueller

We report on low temperature (2-30K) electron transport and magneto-transport measurements of a chemically synthesized InAs nanowire. Both the temperature, T, and transverse magnetic field dependences of the nanowire conductance are…

Mesoscale and Nanoscale Physics · Physics 2015-05-13 Dong Liang , Mohammed R. Sakr , Xuan P. A. Gao

The intimate connection between magnetism and superconducting pairing routinely plays a central role in determining the occurrence of unconventional superconducting states. In high-transition-temperature (high-Tc) stripe-ordered cuprate…

Anderson localisation -- the inhibition of wave propagation in disordered media -- is a surprising interference phenomenon which is particularly intriguing in two-dimensional (2D) systems. While an ideal, non-interacting 2D system of…

Recently, superconductivity was discovered at very low densities in slightly misaligned graphene multilayers. Surprisingly, despite extremely low electronic density (about $10^{-4}$ electrons per unit cell), these systems realize…

Strongly Correlated Electrons · Physics 2020-04-01 Ivar Martin