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The layered material ZrTe$_5$ appears to exhibit several exotic behaviors which resulted in significant interest recently, although the exact properties are still highly debated. Among these we find a Dirac/Weyl semimetallic behavior,…

High magnetic field transport measurements and ab initio calculations on the layered superconductor TaSe3 have provided compelling evidences for the existence of a three-dimensional strong topological insulator state. Longitudinal…

We review low and high field magnetotransport in 80 nm-thick strained HgTe, a material that belongs to the class of strong three-dimensional topological insulators. Utilizing a top gate, the Fermi level can be tuned from the valence band…

Mesoscale and Nanoscale Physics · Physics 2020-07-02 Johannes Ziegler , Dmitriy A. Kozlov , Nikolay N. Mikhailov , Sergey A. Dvoretsky , Dieter Weiss

Transition metal dichalcogenides with nontrivial band structures exhibit various fascinating physical properties and have sparked intensively research interest. Here, we performed systematic magnetotransport measurements on mechanical…

Mesoscale and Nanoscale Physics · Physics 2022-05-04 Jie Wang , Yihao Wang , Min Wu , Junbo Li , Shaopeng Miao , Qingyi Hou , Yun Li , Jianhui Zhou , Xiangde Zhu , Yimin Xiong , Wei Ning , Mingliang Tian

Magneto-transport study has been performed in ZrTe5 single crystals. The observed Shubnikov-de Hass quantum oscillation at low temperature clearly demonstrates the existence of a nontrivial band with small effective mass in ZrTe5.…

Materials Science · Physics 2019-03-28 L. Zhou , A. Ramiere , P. B. Chen , J. Y. Tang , Y. H. Wu , X. Lei , G. P. Guo , J. Q. He , H. T. He

We examine the magnetic and electrical transport properties of the hexagonal EuIn2As2 compound, combining experimental and theoretical results. This compound is predicted to be an axion-insulator from an electronic point of view and an…

Combination of different nontrivial topological states in a single material is capable of realizing multiple functionalities and exotic physics, but such materials are still very sparse. We report herein the results of magnetotransport…

Strongly Correlated Electrons · Physics 2020-05-27 Hao Su , Xianbiao Shi , Wei Xia , Hongyuan Wang , Xuesong Hanli , Zhenhai Yu , Xia Wang , Zhiqiang Zou , Na Yu , Weiwei Zhao , Gang Xu , Yanfeng Guo

The Fermi surface topology of the organic superconductor \lbets has been determined using the Shubnikov-de Haas and magnetic breakdown effects and angle-dependent magnetoresistance oscillations. The former experiments were carried out in…

Superconductivity · Physics 2009-11-07 Charles Mielke , John Singleton , Moon-Sun Nam , Neil Harrison , C. C. Agosta , B. Fravel , L. K. Montgomery

We report a study of the magnetic and electronic properties of the non-centrosymmetric half-Heusler antiferromagnet HoPdBi ($T_N = 2.0$ K). Magnetotransport measurements show HoPdBi has a semimetallic behaviour with a carrier concentration…

Superconductivity · Physics 2015-07-31 A. M. Nikitin , Y. Pan , X. Mao , R. Jehee , G. K. Araizi , Y. K. Huang , C. Paulsen , S. C. Wu , B. H. Yan , A. de Visser

We present a combined experimental and theoretical study of the evolution of the Fermi surface of the anomalous superconductor Pb$_{1-x}$Tl$_x$Te as a function of thallium concentration, drawing on a combination of magnetotransport…

The oxide heterostructure LaAlO3/SrTiO3 supports a two-dimensional electron liquid with a variety of competing phases including magnetism, superconductivity and weak antilocalization due to Rashba spin-orbit coupling. Further confinement of…

Magnetotransport, the response of electrical conduction to external magnetic field, acts as an important tool to reveal fundamental concepts behind exotic phenomena and plays a key role in enabling spintronic applications. Magnetotransport…

We measured the magnetoresistvity (MR) properties of the 1T`-MoTe2 single crystal under the magnetic field up to 33 T.By analyzing the Shubnikov de Haas oscillations of MR at the low temperature, single Fermi surface is revealed.From the…

Strongly Correlated Electrons · Physics 2016-09-21 X. Luo , F. C. Chen , J. L. Zhang , Q. L. Pei , G. T. Lin , W. J. Lu , Y. Y. Han , C. Y. Xi , W. H. Song , Y. P. Sun

First principle FLAPW-GGA calculations have been performed with the purpose to understand the peculiarities of band structure and Fermi surface topology for recently discovered superconductor: Sr4V2Fe2As2O - in comparison with isostructural…

Superconductivity · Physics 2009-04-20 I. R. Shein , A. L. Ivanovskii

We have studied the magnetization of the recently discovered heavy fermion superconductor UTe$_2$ up to 56 T in pulsed-magnetic fields. A first-order metamagnetic transition has been clearly observed at $H_{\rm m}$ =34.9 T when the magnetic…

This study investigates the transport properties of a chiral elemental semiconductor tellurium (Te) under magnetic fields and pressure. Application of hydrostatic pressure reduces the resistivity of Te, while its temperature dependence…

Strongly Correlated Electrons · Physics 2020-09-25 Kazuto Akiba , Kaya Kobayashi , Tatsuo C. Kobayashi , Ryo Koezuka , Atsushi Miyake , Jun Gouchi , Yoshiya Uwatoko , Masashi Tokunaga

We investigate quantum dynamics and kinetics of a 2D conductor with closed Fermi surface reconstructed by a biaxial density wave, in which electrons move along a two-dimensional periodic net of semiclassical trajectories coupled by the…

Strongly Correlated Electrons · Physics 2021-10-28 A. M. Kadigrobov , B. Keran , D. Radić

In the framework of the Ginzburg-Landau equation, the temperature dependence of the upper critical field of small ring-like superconductors is studied. At equilibrium small parts of the phase diagram show paramagnetism for width / radius…

Superconductivity · Physics 2009-11-07 C. Meyers

The intricate interplay between nontrivial topology and magnetism in two-dimensional (2D) materials has led to the emergence of many novel phenomena and functionalities. An outstanding example is the quantum anomalous Hall (QAH) effect,…

Mesoscale and Nanoscale Physics · Physics 2020-01-24 Chang Liu , Yongchao Wang , Hao Li , Yang Wu , Yaoxin Li , Jiaheng Li , Ke He , Yong Xu , Jinsong Zhang , Yayu Wang

We have measured the electrical resistivity, magnetoresistance, and Hall effect on several new single crystal samples and one polycrystalline sample of alpha-uranium. The residual resistivity ratios of these samples vary from 13 to 315.…

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