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Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
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21 papers · 2 filters
History dependent magnetoresistance in lightly doped La_{2-x}Sr_{x}CuO_{4} thin films
Xiaoyan Shi, Dragana Popović, C. Panagopoulos +3
The in-plane magnetoresistance (MR) in atomically smooth La_{2-x}Sr_{x}CuO_{4} thin films grown by molecular-beam-epitaxy was measured in magnetic fields B up to 9 T over a wide ra…
Interaction Driven Quantum Phase Transitions in Fractional Topological Insulators
Hua Chen, Kun Yang
We study two species of (or spin-1/2) fermions with short-range intra-species repulsion in the presence of opposite (effective) magnetic field, each at Landau level filling factor…
Spin Dynamics of a J1-J2-K Model for the Paramagnetic Phase of Iron Pnictides
Rong Yu, Zhentao Wang, Pallab Goswami +3
We study the finite-temperature spin dynamics of the paramagnetic phase of iron pnictides within an antiferromagnetic J_1-J_2 Heisenberg model on a square lattice with a biquadrati…
Wigner-Mott scaling of transport near the two-dimensional metal-insulator transition
M. M. Radonjic, D. Tanaskovic, V. Dobrosavljevic +2
Electron-electron scattering usually dominates the transport in strongly correlated materials. It typically leads to pronounced resistivity maxima in the incoherent regime around t…
Magnetic excitations in the spin-1 anisotropic antiferromagnet
C. Psaroudaki, S. A. Zvyagin, J. Krzystek +3
The spin-1 anisotropic antiferromagnet NiCl_2-4SC(NH2)_2 exhibits a field-induced quantum phase transition that is formally analogous to Bose-Einstein condensation. Here we present…
Fermions on bilayer graphene: symmetry breaking for B=0 and nu=0
Robert E. Throckmorton, Oskar Vafek
We extend previous analyses of fermions on a honeycomb bilayer lattice via weak-coupling renormalization group (RG) methods with extremely short-range and extremely long-range inte…
Nonmetallic Gasket and Miniature Plastic Turnbuckle Diamond Anvil Cell for Pulsed Magnetic Field Studies at Cryogenic Temperatures
David E. Graf, Ryan L. Stillwell, Kenneth M. Purcell +1
A plastic turnbuckle diamond anvil cell (DAC) and nonmetallic gasket have been developed for pulsed magnetic field studies to address issues of eddy current heating and Lorentz for…
Asymmetric spatial structure of zero modes for birefringent Dirac fermions
Bitan Roy, Peter M. Smith, Malcolm P. Kennett
We study the zero energy modes that arise in an unusual vortex configuration involving both the kinetic energy and an appropriate mass term in a model which exhibits birefringent D…
Realizing Universal Edge Properties in Graphene Fractional Quantum Hall Liquids
Zi-Xiang Hu, R. N. Bhatt, Xin Wan +1
Universal chiral Luttinger liquid behavior has been predicted for fractional quantum Hall edge states, but so far has not been observed experimentally in semiconductor-based two-di…
Symmetric and antisymmetric exchange anisotropies in quasi-one-dimensional CuSeO as revealed by ESR
M. Herak, A. Zorko, D. Arcon +5
We present an electron spin resonance (ESR) study of single-crystalline spin chain-system CuSeO in the frequency range between 9 GHz and 450 GHz. In a wide temperature rang…
Thermally activated exchange narrowing of the Gd3+ ESR fine structure in a single crystal of Ce1-xGdxFe4P12 (x = 0.001) skutterudite
F. A. Garcia, P. A. Venegas, P. G. Pagliuso +4
We report electron spin resonance (ESR) measurements in the Gd3+ doped semiconducting filled skutterudite compound Ce1-xGdxFe4P12 (x = 0.001). As the temperature T varies from T =…
High pressure sequence of Ba_3NiSb_2O_9 structural phases: new quantum spin-liquids based on Ni^{2+}
J. G. Cheng, G. Li, L. Balicas +4
By using a high pressure, high temperature (HPHT) technique, the antiferromagnetically ordered ( = 13.5 K) 6H-A phase of BaNiSbO was transformed into two new gaple…
Role of Antisymmetric Exchange in Selecting Magnetic Chirality in BaNbFeSiO
A. Zorko, M. Pregelj, A. Potočnik +6
We present electron spin resonance (ESR) investigation of the acentric \FeLang, featuring a unique single-domain double-chiral magnetic ground state. Combining simulations of the E…
Angular dependent magnetothermopower of alpha-(ET)2KHg(SCN)4
D. Krstovska, E. Steven, E. S. Choi +1
The magnetic field and angular dependencies of the thermopower and Nernst effect of the quasi-two-dimensional organic conductor alpha-(ET)2KHg(SCN)4 are experimentally measured at…
Hole spectral functions in lightly doped quantum antiferromagnets
Satyaki Kar, Efstratios Manousakis
We study the hole and magnon spectral functions as a function of hole doping in the two-dimensional (2D) t-J and t-t'-t"-J models working within the limits of the spin-wave theory,…
Nernst response of the Landau tubes in graphite across the quantum limit
Benoit Fauqué, Zengwei Zhu, Tim Murphy +1
We report on a study of the Nernst effect in graphite extended up to 45 T. The Nernst response sharply peaks each time a Landau tube is squeezed inside the thermally fuzzy Fermi su…
Lattice-Driven Magnetoresistivity and Metal-Insulator Transition in Single-Layered Iridates
M. Ge, T. F. Qi, O. B. Korneta +4
Sr2IrO4 exhibits a novel insulating state driven by spin-orbit interactions. We report two novel phenomena, namely a large magnetoresistivity in Sr2IrO4 that is extremely sensitive…
Phase diagram, energy scales and nonlocal correlations in the Anderson lattice model
D. Tanaskovic, K. Haule, G. Kotliar +1
We study the Anderson lattice model with one f-orbital per lattice site as the simplest model which describes generic features of heavy fermion materials. The resistivity and magne…
Anisotropic hysteretic Hall-effect and magnetic control of chiral domains in the chiral spin states of PrIrO
L. Balicas, S. Nakatsuji, Y. Machida +1
We uncover a strong anisotropy in both the anomalous Hall effect (AHE) and the magnetoresistance of the chiral spin states of PrIrO. The AHE appearing below 1.5 K at ze…
Electronic inhomogeneity in a Kondo lattice
E. D. Bauer, Yi-feng Yang, C. Capan +12
Inhomogeneous electronic states resulting from entangled spin, charge, and lattice degrees of freedom are hallmarks of strongly correlated electron materials; such behavior has bee…
Multiple regions of quantum criticality in YbAgGe
G. M. Schmiedeshoff, E. D. Mun, A. W. Lounsbury +7
Dilation and thermopower measurements on YbAgGe, a heavy-fermion antiferromagnet, clarify and refine the magnetic field-temperature (H-T) phase diagram and reveal a field-induced p…