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We find that the long-wavelength magnetoplasmon, resistively detected by photoconductivity spectroscopy in high-mobility two-dimensional electron systems, deviates from its well-known semiclassical nature as uncovered in conventional…

Mesoscale and Nanoscale Physics · Physics 2009-11-10 S. Holland , Ch. Heyn , D. Heitmann , E. Batke , R. Hey , K. J. Friedland , C. -M. Hu

The breaking of parity and time-reversal symmetry in two-dimensional Fermi liquids gives rise to non-dissipative transport features characterized by the Hall viscosity. In magnetic fields, the Hall viscous force directly competes with the…

Interacting bosonic atoms under strong gauge fields undergo a series of phase transitions that take the cloud from a simple Bose-Einstein condensate all the way to a family of fractional-quantum-Hall-type states [M. Popp, B. Paredes, and J.…

Quantum Gases · Physics 2013-05-22 H. Pino , E. Alba , J. Taron , J. J. Garcia-Ripoll , N. Barberan

We consider various methods and techniques for measuring electron magnetization and susceptibility, which are used in experimental condensed matter physics. The list of considered methods for macroscopic measurements includes…

Materials Science · Physics 2023-02-20 V. M. Pudalov

Delta-E effect-based magnetoelectric sensors have emerged as promising technology for detecting weak magnetic fields at low frequencies. However, the performance of such sensors remains difficult to predict, as signal and noise…

It is demonstrated how the correction factor alpha used in Hall magnetometry of localized magnetic field profiles depends on the sample geometry and on the electron mean free path, in the quasi-ballistic and ballistic regimes, for weak and…

Mesoscale and Nanoscale Physics · Physics 2015-05-27 M. Cerchez , T. Heinzel

We develop a two-carrier Hall effect model fitting algorithm to analyze temperature-dependent magnetotransport measurements of a high-density ($\sim4\times10^{13}$ cm$^2$/Vs) polarization-induced two-dimensional hole gas (2DHG) in a GaN/AlN…

Applied Physics · Physics 2025-01-27 Joseph E. Dill , Chuan F. C. Chang , Debdeep Jena , Huili Grace Xing

Electric field effect devices based on mesoscopic graphite are fabricated for galvanomagnetic measurements. Strong modulation of magneto-resistance and Hall resistance as a function of gate voltage is observed as sample thickness approaches…

Mesoscale and Nanoscale Physics · Physics 2009-11-10 Yuanbo Zhang , Joshua P. Small , Michael E. S. Amori , Philip Kim

Gate-controllable two dimensional systems with in-plane modulation of properties could serve as highly tunable effective media. Intuitively, such systems may bring novel functionality provided that the period of the lateral modulation is…

Mesoscale and Nanoscale Physics · Physics 2019-11-04 Alexey Shupletsov , Alexander Kuntsevich , Martin Nunuparov , Alexander Rakhmanov , Kirill Prikhodko

Scanning Hall probe and local Hall magnetometry measurements have been used to investigate flux distributions in large mesoscopic superconducting disks with sizes that lie near the crossover between the bulk and mesoscopic vortex regimes.…

Superconductivity · Physics 2009-11-13 M. R. Connolly , M. V. Milosevic , S. J. Bending , J. R. Clem , T. Tamegai

Due to the lack of simulation tools that take into account the actual geometry of complicated quantum Hall samples there are lots of experiments that are not yet fully understood. Already some years ago R. G. Mani recorded a shift of the…

Mesoscale and Nanoscale Physics · Physics 2015-06-03 Christoph Uiberacker , Christian Stecher , Josef Oswald

To fully appreciate the impacts that the discovery of the quantum Hall effect had on electrical metrology, it may benefit the reader to cultivate a general understanding of the phenomenon. Two-dimensional electron systems can exhibit many…

Mesoscale and Nanoscale Physics · Physics 2022-02-15 Albert F. Rigosi

Anomalous Hall Effect (AHE) response in magnetic systems is typically proportional to an out-of-plane magnetization component because of the restriction imposed by system symmetries, which demands that the magnetization, applied electric…

The nonlinear behavior of the Hall resistivity at low magnetic fields in single quantum well GaAs/In$_x$Ga$_{1-x}$As/GaAs heterostructures with degenerated electron gas is studied. It has been found that this anomaly is accompanied by the…

Disordered Systems and Neural Networks · Physics 2018-07-11 G. M. Minkov , A. V. Germanenko , O. E. Rut , A. A. Sherstobitov , B. N. Zvonkov

Electrical resistivities can be different for charge currents travelling parallel or perpendicular to the magnetization in magnetically ordered conductors or semiconductors, resulting in the well-known planar Hall effect and anisotropic…

Mesoscale and Nanoscale Physics · Physics 2018-10-30 J. Liu , L. J. Cornelissen , J. Shan , T. Kuschel , B. J. van Wees

Nowadays, magnetoresponsive soft materials, based not simply on magnetic nanoparticles, but rather on multiple components with distinct sizes and magnetic properties, both in liquid and polymeric carriers, are becoming more and more…

Soft Condensed Matter · Physics 2024-02-06 Andrey A. Kuznetsov , Sofia S. Kantorovich

The hysteresis observed in the magnetoresistance of bilayer 2D systems in the quantum Hall regime is generally attributed to the long time constant for charge transfer between the 2D systems due to the very low conductivity of the quantum…

Mesoscale and Nanoscale Physics · Physics 2015-05-20 L. H. Ho , L. J. Taskinen , A. P. Micolich , A. R. Hamilton , P. Atkinson , D. A. Ritchie

Recent thermodynamic measurements on two-dimensional (2D) electron systems have found diverging behavior in the magnetic susceptibility and appearance of ferromagnetism with decreasing electron density. The critical densities for these…

Strongly Correlated Electrons · Physics 2007-05-23 S. M. Fazeli , K. Esfarjani , B. Tanatar

Planar Hall magnetoresistive sensors (PHMR) are promising candidates for various magnetic sensing applications due to their high sensitivity, low power consumption, and compatibility with integrated circuit technology. However, their…

Strongly Correlated Electrons · Physics 2025-04-09 Jan Schmidtpeter , Proloy Taran Das , Yevhen Zabila , Conrad Schubert , Thomas Gundrum , Thomas Wondrak , Denys Makarov

We present the first measurements of Hall conductivity utilizing a new torque magnetometry method designed for insulators. A Corbino disk exhibits a magnetic dipole moment proportional to Hall conductivity when voltage is applied across a…

Mesoscale and Nanoscale Physics · Physics 2019-09-02 Samuel Mumford , Tiffany Paul , Seung Hwan Lee , Amir Yacoby , Aharon Kapitulnik