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Engineering devices with a large electrical response to magnetic field is of fundamental importance for a range of applications such as magnetic field sensing and magnetic read-heads. We show that a colossal non-saturating linear…

介观与纳米尺度物理 · 物理学 2012-08-28 M. A. Aamir , Srijit Goswami , Matthias Baenninger , Vikram Tripathi , Michael Pepper , Ian Farrer , David A. Ritchie , Arindam Ghosh

The anomalous metallic state in high-temperature superconducting cuprates is masked by the onset of superconductivity near a quantum critical point. Use of high magnetic fields to suppress superconductivity has enabled a detailed study of…

An analytical model invoking variations in the charge-carrier density is used to generate magnetoresistance curves that are almost indistinguishable from those produced by sophisticated numerical models. This demonstrates that, though…

超导电性 · 物理学 2020-07-08 John Singleton

We report a magnetotransport study of an ultra-high mobility ($\bar{\mu}\approx 25\times 10^6$\,cm$^2$\,V$^{-1}$\,s$^{-1}$) $n$-type GaAs quantum well up to 33 T. A strong linear magnetoresistance (LMR) of the order of 10$^5$ % is observed…

介观与纳米尺度物理 · 物理学 2017-01-04 T. Khouri , U. Zeitler , C. Reichl , W. Wegscheider , N. E. Hussey , S. Wiedmann , J. C. Maan

Linear magnetoresistance occurs in semiconductors as a consequence of strong electrical disorder and is characterized by nonsaturating magnetoresistance that is proportional to the applied magnetic field. By investigating a disordered…

介观与纳米尺度物理 · 物理学 2015-05-19 H. G. Johnson , S. P. Bennett , R. Barua , L. H Lewis , D. Heiman

A positive, non-saturating and dominantly linear magnetoresistance is demonstrated to occur in the surface state of a topological insulator having a wavevector-linear energy dispersion together with a finite positive Zeeman energy…

介观与纳米尺度物理 · 物理学 2012-08-28 C. M. Wang , X. L. Lei

The observation of non-saturating classical linear magnetoresistivity has been an enigmatic phenomenon in solid state physics. We present a study of a two-dimensional ohmic conductor, including local Hall effect and a self-consistent…

无序系统与神经网络 · 物理学 2017-01-25 Ferdinand Kisslinger , Christian Ott , Heiko B. Weber

Disorder-induced magnetoresistance has been reported in a range of solid metals and semiconductors, however, the underlying physical mechanism is still under debate because it is difficult to experimentally control. Liquid metals, due to…

材料科学 · 物理学 2019-07-03 Xiaolin Wang , Feixiang Xiang , David Cortie , Zengji Yue , Zhi Li , Zhidong Zhang , Lina Sang

The scaling of $H$-linear magnetoresistance in field and temperature was measured in under-doped (x = 0.19) and optimally-doped (x=0.31)~BaFe$_2$(As$_{1-x}$P$_x$)$_2$. We analyze the data based on an orbital model in the presence of…

The recent discovery of large and non-saturating magnetoresistance (LMR) in WTe2 provides a unique playground to find new phenomena and significant perspective for potential applications. Here we report the first observation of…

We studied the magnetoresistivity of the AM2B2 and A3Rh8B6 (A = Ca, Sr; M = Rh, Ir) compounds within the ranges 1.8<=T<=300 K and 0<=H<=50 kOe. The zero-field resistivity {\rho}0(T) is metallic and follows closely the Bloch-Gr\"uneisen…

超导电性 · 物理学 2011-08-31 Hiroyuki Takeya , Mohammed ElMassalami

Two-component systems with equal concentrations of electrons and holes exhibit non-saturating, linear magnetoresistance in classically strong magnetic fields. The effect is predicted to occur in finite-size samples at charge neutrality in…

介观与纳米尺度物理 · 物理学 2015-04-28 P. S. Alekseev , A. P. Dmitriev , I. V. Gornyi , V. Yu. Kachorovskii , B. N. Narozhny , M. Schuett , M. Titov

Scaling theory, duality symmetry, and numerical simulations of a random network model are used to study the magnetoresistance of a metal/insulator/perfect conductor composite with a disordered columnar microstructure. The phase diagram is…

材料科学 · 物理学 2009-10-31 Sergey V. Barabash , David J. Bergman , D. Stroud

The LAO/STO interface hosts a two-dimensional electron system that is unusually sensitive to the application of an in-plane magnetic field. Low-temperature experiments have revealed a giant negative magnetoresistance (dropping by 70\%),…

介观与纳米尺度物理 · 物理学 2015-07-06 M. Diez , A. M. R. V. L. Monteiro , G. Mattoni , E. Cobanera , T. Hyart , E. Mulazimoglu , N. Bovenzi , C. W. J. Beenakker , A. D. Caviglia

We report the observation of a linear magnetoresistance in single crystals and epitaxial thin films of the pyrochlore iridate Bi$_2$Ir$_2$O$_7$. The linear magnetoresistance is positive and isotropic at low temperatures, without any sign of…

The change of a material's electrical resistance (R) in response to an external magnetic field (B) provides subtle information for the characterization of its electronic properties and has found applications in sensor and storage related…

In metals near a quantum critical point, the electrical resistance is thought to be determined by the lifetime of the carriers of current, rather than the scattering from defects. The observation of $T$-linear resistivity suggests that the…

Using high-resolution magnetometry we have investigated in detail the magnetization $M$ above the critical temperature $T_c$ in $\rm Bi_2Sr_2CaCu_2O_{8+\delta}$. In a broad range of temperature $T$ above $T_c$, we find that $M(T,H)$ is…

超导电性 · 物理学 2010-12-17 Lu Li , Yayu Wang , M. J. Naughton , S. Ono , Yoichi Ando , N. P. Ong

An understanding of the normal state in the high-temperature superconducting cuprates is crucial to the ultimate understanding of the long-standing problem of the origin of the superconductivity itself. This so-called strange metal state is…

超导电性 · 物理学 2020-08-07 Tarapada Sarkar , P. R. Mandal , N. R. Poniatowski , M. K. Chan , Richard L. Greene

Zero-field and transverse-field muon spin rotation/relaxation ($\mu$SR) experiments were undertaken in order to elucidate microscopic properties of a strongly-coupled superconductor Mo$_{8}$Ga$_{41}$ with $T_{\text{c}}=9.8$ K. The upper…

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