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The conduction band electron states of laterally-coupled semiconductor quantum rings are studied within the frame of the effective mass envelope function theory. We consider the effect of axial and in-plane magnetic fields for several…

Mesoscale and Nanoscale Physics · Physics 2015-06-25 J. Planelles , F. Rajadell , J. I. Climente , M. Royo , J. L. Movilla

We report magnetoresistivity measurements on strongly underdoped YBa_2Cu_3O_x (x=6.25, 6.36) single crystals in applied magnetic fields H || c-axis. We identify two different contributions to both in-plane and out-of-plane…

Superconductivity · Physics 2009-11-07 E. Cimpoiasu , G. A. Levin , C. C. Almasan , A. P. Paulikas , B. W. Veal

We investigate the diffusive magnetotransport properties of a two-dimensional electron gas residing in a wrinkled nanostructure. The curved geometry of the nanostructure renders an effective inhomogeneous magnetic field which, in turns,…

Materials Science · Physics 2017-11-27 Ching Hao Chang , Carmine Ortix

The universal oscillation of the tunnel magnetoresistance (TMR) ratio as a function of the insulating barrier thickness in crystalline magnetic tunnel junctions (MTJs) is a long-standing unsolved problem in condensed matter physics. To…

Materials Science · Physics 2025-06-11 Keisuke Masuda , Thomas Scheike , Hiroaki Sukegawa , Yusuke Kozuka , Seiji Mitani , Yoshio Miura

Recently, the resistance saturation at low temperature in Kondo insulator SmB6, a long-standing puzzle in condensed matter physics, was proposed to originate from topological surface state. Here,we systematically studied the…

Strongly Correlated Electrons · Physics 2015-03-30 F. Chen , C. Shang , Z. Jin , D. Zhao , Y. P. Wu , Z. J. Xiang , Z. C. Xia , A. F. Wang , X. G. Luo , T. Wu , X. H. Chen

Extremely large non-saturating magnetoresistance has recently been reported for a large number of both topologically trivial and non-trivial materials. Different mechanisms have been proposed to explain the observed magnetotransport…

Materials Science · Physics 2019-01-23 Sheng Nan Zhang , Quan Sheng Wu , Yi Liu , Oleg V. Yazyev

We investigate an electromagnetic instability in two-dimensional materials arising from an anisotropy of the Fermi surface, utilizing a kinetic model accounting for the effects of the values of temperature, chemical potential and anisotropy…

Materials Science · Physics 2025-06-27 Diogo Simões , Hugo Terças , Jorge Ferreira

Through systematics density functional calculations, the mechanism of the substrate induced spin reorientation transition in FePc/O-Cu(110) was explained in terms of charge transfer and rearrangement of Fe-d orbitals. Moreover, we found…

Materials Science · Physics 2014-01-14 Jun Hu , Ruqian Wu

We report a large linear magnetoresistance in Cu$_{2-x}$Te, reaching $\Delta\rho/\rho(0)$ = 250\% at 2 K in a 9 T field. This is observed for samples with $x$ in the range 0.13 to 0.22, and the results are comparable to the effects observed…

Materials Science · Physics 2017-03-24 Ali A. Sirusi , Alexander Page , Lucia Steinke , Meigan C. Aronson , Ctirad Uher , Joseph H. Ross

Quantum oscillations in the binary antiferromagnetic metal FeAs are presented and compared to theoretical predictions for the electronic band structure in the anomalous spin density wave state of this material. Demonstrating a new method…

Strongly Correlated Electrons · Physics 2017-08-16 Daniel J. Campbell , Chris Eckberg , Kefeng Wang , Limin Wang , Halyna Hodovanets , Dave Graf , David Parker , Johnpierre Paglione

We investigate tunneling decay in a magnetic field. Because of broken time-reversal symmetry, the standard WKB technique does not apply. The decay rate and the outcoming wave packet are found from the analysis of the set of the particle…

Mesoscale and Nanoscale Physics · Physics 2009-10-31 T. Barabash-Sharpee , M. I. Dykman , P. M. Platzman

We examine the effect of changing the linear polarization angle $\theta$ of incident microwaves with respect to the dc current on radiation-induced magnetoresistance oscillations in a two-dimensional (2D) system within the balance-equation…

Materials Science · Physics 2015-06-12 X. L. Lei , S. Y. Liu

A central puzzle in strongly correlated electronic phases is strange metallic transport, marked by $T$-linear resistivity and $B$-linear magnetoresistance, in sharp contrast with quadratic scalings observed in conventional metals. Here, we…

Strongly Correlated Electrons · Physics 2026-05-08 Jaewon Kim , Shubhayu Chatterjee

We show that in a layered metal, the angle dependent, finite frequency, interlayer magnetoresistance is altered due to the presence of a non-zero Berry curvature at the Fermi surface. At zero frequency, we find a conservation law which…

Mesoscale and Nanoscale Physics · Physics 2013-10-02 Anthony R. Wright , Ross H. McKenzie

The magnetic and transport properties are systematically studied on the single crystal $Na_{0.55}CoO_2$ with charge ordering and divergency in resistivity below 50 K. A long-range ferromagnetic ordering is observed in susceptibility below…

Strongly Correlated Electrons · Physics 2009-11-11 C. H. Wang , X. H. Chen , T. Wu , X. G. Luo , G. Y. Wang , J. L. Luo

We show how the in-plane magnetic field, which breaks time-reversal and rotational symmetries of the orbital motion of electrons in a heterostructure due to the momentum-dependent inter-subband mixing, affects weak localisation correction…

Mesoscale and Nanoscale Physics · Physics 2009-11-07 Vladimir I. Fal'ko , Tomas Jungwirth

Magnetism plays a key role in the emergence of topological phenomena in the Weyl semimetal Co3Sn2S2, which exhibits a ferromagnetic (FM) interactions along the c-axis of the crystal and an antiferromagnetic (AFM) interactions within the ab…

We have studied the angular dependence of the irreversible magnetization of several YBa$_2$Cu$_3$O$_7$ and 2H-NbSe$_2$ single crystals with columnar defects tilted off the c-axis. At high magnetic fields, the irreversible magnetization…

Superconductivity · Physics 2009-11-07 A. V. Silhanek , L. Civale , M. A. Avila

Linear polarization angle, $\theta$, dependent measurements of the microwave radiation-induced oscillatory magnetoresistance, $R_{xx}$, in high mobility GaAs/AlGaAs 2D electron devices have shown a $\theta$ dependence in the oscillatory…

Mesoscale and Nanoscale Physics · Physics 2017-09-13 Han-Chun Liu , Tianyu Ye , W. Wegscheider , R. G. Mani

Quasi-two dimensional transition metal dichalcogenides (TMD) exhibit dramatic properties that may transform electronic and photonic devices. We report on how the anomalously large magnetoresistance (MR) observed under high magnetic field in…

Materials Science · Physics 2017-12-21 Junjie Yang , Jonathan Colen , Jun Liu , Manh Cuong Nguyen , Gia-Wei Chern , Despina Louca