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We investigated the magnetotransport of InAs nanowires grown by selective area metal-organic vapor phase epitaxy. In the temperature range between 0.5 and 30 K reproducible fluctuations in the conductance upon variation of the magnetic…

介观与纳米尺度物理 · 物理学 2015-05-20 S. Estévez Hernández , M. Akabori , K. Sladek , Ch. Volk , S. Alagha , H. Hardtdegen , N. Demarina , D. Grützmacher , Th. Schäpers , M. G. Pala

Magnetic field dependent universal conductance fluctuations (UCF's) are observed in weakly disordered indium tin oxide nanowires from 0.26 K up to $\sim 25$ K. The fluctuation magnitudes increase with decreasing temperature, reaching a…

介观与纳米尺度物理 · 物理学 2012-02-15 Ping-Yu Yang , L. Y. Wang , Yao-Wen Hsu , Juhn-Jong Lin

We have fabricated indium-doped ZnO (IZO) nanowires (NWs) and carried out 4-probe electrical-transport measurements at low temperatures. The NWs reveal charge conduction behavior characteristic of disordered metals. In addition to the $T$…

介观与纳米尺度物理 · 物理学 2017-02-21 Shao-Pin Chiu , Jia G. Lu , Juhn-Jong Lin

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…

介观与纳米尺度物理 · 物理学 2015-05-13 Dong Liang , Mohammed R. Sakr , Xuan P. A. Gao

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

Single crystal ZnO nanowires doped with indium are synthesized via the laser-assisted chemical vapor deposition method. The conductivity of the nanowires is measured at low temperatures in magnetic fields both perpendicular and parallel to…

介观与纳米尺度物理 · 物理学 2015-05-13 Richard S. Thompson , Dongdong Li , Christopher M. Witte , Jia G. Lu

Magnetoresistance in long correlated nanowires of degenerate semiconductor InSb in asbestos matrix (wire diameter of around 5 nm, length 0.1 - 1 mm) is studied over temperature range 2.3 - 300 K. At zero magnetic field the electric…

强关联电子 · 物理学 2009-11-07 S. V. Zaitsev-Zotov , Yu. A. Kumzerov , Yu. A. Firsov , P. Monceau

Resistance as a function of temperature down to 20mK and magnetic fields up to 18T for various carrier concentrations is measured for nanowires made from the SrTiO3/LaAlO3 interface using a hard mask shadow deposition technique. The narrow…

介观与纳米尺度物理 · 物理学 2014-11-21 A. Ron , E. Maniv , D. Graf , J. -H. Park , Y. Dagan

The magnetic properties of the layered oxypnictide LaMnAsO have been revisited using neutron scattering and magnetization measurements. The present measurements identify the N\'{e}el temperature $T_N$ = 360(1) K. Below $T_N$ the critical…

强关联电子 · 物理学 2016-02-10 Michael A. McGuire , V. Ovidiu Garlea

We investigate the magnetic susceptibility $\chi(T)$ of quantum spin chains of $N=1280$ spins with power-law long-range antiferromagnetic coupling as a function of their spatial decay exponent $\alpha$ and cutoff length $\xi$. The…

无序系统与神经网络 · 物理学 2018-02-06 N. Moure , Hyun-Yong Lee , S. Haas , R. N. Bhatt , S. Kettemann

We probe the magnetotransport properties of individual InAs nanowires in a field effect transistor geometry. In the low magnetic field regime we observe magnetoresistance that is well described by the weak localization (WL) description in…

Effects of spin-orbit coupling and s-d exchange interaction are probed by magnetoresistance measurements carried out down to 50 mK on ZnO and Zn_{1-x}Mn_{x}O with x = 3 and 7%. The films were obtained by laser ablation and doped with Al to…

无序系统与神经网络 · 物理学 2009-11-11 T. Andrearczyk , J. Jaroszynski , G. Grabecki , T. Dietl , T. Fukumura , M. Kawasaki

We have measured near normal incidence far infrared (FIR) reflectivity spectra of a single crystal of TbMnO3 from 10K to 300K in the spectral range of 50 cm$^{-1}$ to 700 cm$^{-1}$. Fifteen transverse optic (TO) and longitudinal optic (LO)…

材料科学 · 物理学 2015-05-13 Pradeep Kumar , Surajit Saha , C. R. Serrao , A. K. Sood , C. N. R. Rao

Segmented magnetic nanowires are a promising route for the development of three dimensional data storage techniques. Such devices require a control of the coercive field and the coupling mechanisms between individual magnetic elements. In…

Temperature and magnetic field dependences of the conductivity in heavily doped, strongly disordered two-dimensional quantum well structures GaAs/In$_x$Ga$_{1-x}$As/GaAs are investigated within wide conductivity and temperature ranges. Role…

无序系统与神经网络 · 物理学 2016-08-31 G. M. Minkov , A. V. Germanenko , O. E. Rut , A. A. Sherstobitov , B. N. Zvonkov

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…

强关联电子 · 物理学 2009-11-11 C. H. Wang , X. H. Chen , T. Wu , X. G. Luo , G. Y. Wang , J. L. Luo

Magnetic and electronic structures in LaFeAsO in the single-stripe-type antiferromagnetic (AFM) phase are studied using first-principles density-functional calculations including the spin-orbit interaction. We show that the longitudinal…

超导电性 · 物理学 2016-12-28 Sehoon Oh , Jung-Hoon Lee , Hyun Myung Jang , Hyoung Joon Choi

Strong disorder has a crucial effect on the electronic structure in quantum materials by increasing localization, interactions, and modifying the density of states. Bi$_x$TeI films grown at room temperature and \SI{230}{K} exhibit dramatic…

材料科学 · 物理学 2023-06-06 Paul Corbae , Nicolai Taufertshöfer , Ellis Kennedy , Mary Scott , Frances Hellman

We report on the observation of weak localization in arrays of (Ga,Mn)As nanowires at millikelvin temperatures. The corresponding phase coherence length is typically between 100 nm and 200 nm at 20 mK. Strong spin-orbit interaction in the…

介观与纳米尺度物理 · 物理学 2009-11-13 D. Neumaier , K. Wagner , S. Geissler , U. Wurstbauer , J. Sadowski , W. Wegscheider , D. Weiss

Systematically magnetic and magnetothermal measurements at temperatures down to 2 K and magnetic fields up to 13.5 Tesla for Gd(OH)3 Single Crystal Nanowires - Quasi-1D Large Spin (S = -7/2) Chain Antiferromagnet have been conducted. We…

材料科学 · 物理学 2012-07-16 R. Zeng , C. F. Zhang , J. C. Debnath , P. Shamba , J. L. Wang , Z. X. Chen , Z. P. Guo , S. X. Dou
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