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Showing 2009 · cond-mat.str-elShow all

14 papers · 2 filters

cond-mat.str-el2009★ 14 cited

Interplay of bulk and interface effects in the electric-field driven transition in magnetite

A. A. Fursina, R. G. S. Sofin, I. V. Shvets +1

Contact effects in devices incorporating strongly-correlated electronic materials are comparatively unexplored. We have investigated the electrically-driven phase transition in mag…

cond-mat.str-el2009★ 129 cited

Quantum Criticality and Global Phase Diagram of Magnetic Heavy Fermions

Qimiao Si

Quantum criticality describes the collective fluctuations of matter undergoing a second-order phase transition at zero temperature. It is being discussed in a number of strongly co…

cond-mat.str-el2009★ 131 cited

Band Narrowing and Mott Localization in Iron Oxychalcogenides La2O2Fe2O(Se,S)2

Jian-Xin Zhu, Rong Yu, Hangdong Wang +7

Bad metal properties have motivated a description of the parent iron pnictides as correlated metals on the verge of Mott localization. What has been unclear is whether interactions…

cond-mat.str-el2009★ 30 cited

Critical Kondo destruction in a pseudogap Anderson model: scaling and relaxational dynamics

Matthew T. Glossop, Stefan Kirchner, J. H. Pixley +1

We study the pseudogap Anderson model as a prototype system for critical Kondo destruction. We obtain finite-temperature (T) scaling functions near its quantum critical point, usin…

cond-mat.str-el2009★ 55 cited

The fate of 1D spin-charge separation away from Fermi points

Thomas L. Schmidt, Adilet Imambekov, Leonid I. Glazman

We consider the dynamic response functions of interacting one dimensional spin-1/2 fermions at arbitrary momenta. We build a non-perturbative zero-temperature theory of the thresho…

cond-mat.str-el2009★ 3 cited

Critical Kondo destruction and the violation of the quantum-to-classical mapping of quantum criticality

Stefan Kirchner, Qimiao Si

Antiferromagnetic heavy fermion metals close to their quantum critical points display a richness in their physical properties unanticipated by the traditional approach to quantum c…

cond-mat.str-el2009★ 27 cited

Universal phase diagram of disordered bosons from a doped quantum magnet

Rong Yu, Stephan Haas, Tommaso Roscilde

A quantum particle cannot in general diffuse through a disordered medium because of its wavelike nature, but interacting particles can escape localization by collectively percolati…

cond-mat.str-el2009★ 9 cited

On the concept of effective temperature in current carrying quantum critical states

Stefan Kirchner, Qimiao Si

Quantum criticality has attracted considerable attention both theoretically and experimentally as a way to describe part of the phase diagram of strongly correlated systems. A scal…

cond-mat.str-el2009★ 12 cited

Quantum phase transitions in a charge-coupled Bose-Fermi Anderson model

Mengxing Cheng, Matthew T. Glossop, Kevin Ingersent

We study the competition between Kondo physics and dissipation within an Anderson model of a magnetic impurity level that hybridizes with a metallic host and is also coupled, via t…

cond-mat.str-el2009★ 144 cited

The Kondo effect in ferromagnetic atomic contacts

M. R. Calvo, J. Fernández-Rossier, J. J. Palacios +3

Iron, cobalt and nickel are archetypal ferromagnetic metals. In bulk, electronic conduction in these materials takes place mainly through the and electrons, whereas the mag…

cond-mat.str-el2009★ 20 cited

Renormalization Group for Mixed Fermion-Boson Systems

Seiji J. Yamamoto, Qimiao Si

We formulate a momentum-shell renormalization group (RG) procedure that can be used in theories containing both bosons and fermions with a Fermi surface. We focus on boson-fermion…

cond-mat.str-el2009★ 55 cited

The origin of hysteresis in resistive switching in magnetite is Joule heating

A. A. Fursina, R. G. S. Sofin, I. V. Shvets +1

In many transition metal oxides the electrical resistance is observed to undergo dramatic changes induced by large biases. In magnetite, FeO, below the Verwey temperature,…

cond-mat.str-el2009★ 13 cited

Local-moment ferromagnetism and unusual magnetic domains in FeTaS crystals

M. D. Vannette, S. Yeninas, E. Morosan +2

Single crystals of FeTaS have been studied by using magneto-optical (MO) imaging and radio-frequency (rf) magnetic susceptibility, . Real time MO images reveal unu…

cond-mat.str-el2009

Fermi liquid state and enhanced electron correlations in the new iron pnictide CaFeAs

Liang L. Zhao, Tanghong Yi, James C. Fettinger +2

The newly discovered CaFeAs system displays low-temperature Fermi liquid behavior, with enhanced electron-electron correlations. At high temperatures, the magnetic suscepti…