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Ana Akrap

Cette personne n’est plus à l’EPFL

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Publications associées (38)

Manifestation of the spin textures in the thermopower of MnSi

László Forró, Ana Akrap, Stevan Arsenijevic

To identify possible spin texture contributions to thermoelectric transport, we present a detailed temperature and pressure dependence of thermopower S in MnSi, as well as a lowtemperature study of S in a magnetic field. We find that S/T reconstructs the ( ...

IOP Publishing - EPL Association2013

BaVS3 probed by V L edge x-ray absorption spectroscopy

Helmuth Berger, László Forró, Ana Akrap

Polarization dependent vanadium L edge x-ray absorption spectra of BaVS3 single crystals are measured in the four phases of the compound. The difference between signals with the polarizations E perpendicular to c and E parallel to c ( linear dichroism) cha ...

2012

Charge ordering in substituted and non-stoichiometric BaVS3

Helmuth Berger, László Forró, Ana Akrap

Among the correlated electronic systems, BaVS3 which exhibits both itinerant and localized states as well as a subtle interplay betwen charge, orbital, spin and lattice degrees of freedom, is a model system. Its electronic structure consists in a broad qua ...

2010

Electrical transport in charge-ordered Fe2OBO3: Resistive switching and pressure effects

László Forró, Ana Akrap

The pressure-temperature-electric field phase diagram of Fe2OBO3 is studied under ambient and high pressure using resistivity and thermoelectric power measurements. The onset of the incommensurate charge order at T-CO=340 K does not depend on pressure up t ...

2010

Transport and magnetic properties of BaVSe3

Helmuth Berger, László Forró, Neven Barisic, Ana Akrap, Vladan Stevanovic

We report a comprehensive study of transport, magnetotransport, and magnetic properties of single crystals of BaVSe3. The paramagnetic metal-ferromagnetic metal transition at 43 K was followed as a function of pressure by measuring the electrical resistivi ...

2008

Magnetic anisotropy of paramagnetic and ferromagnetically ordered state of single crystal BaVSe3

Helmuth Berger, László Forró, Ana Akrap

Anisotropic magnetism of single crystal BaVSe3 was Studied for the first time by the combination of the susceptibility and torque methods. As reported previously for polycrystalline sample, BaVSe3 undergoes ferromagnetic ordering below 43 K. Well above fer ...

2008

Collective charge excitations below the metal-to-insulator transition in BaVS3

Helmuth Berger, László Forró, Ana Akrap

The charge response in barium vanadium sulfide (BaVS3) single crystals is characterized by dc resistivity and low-frequency dielectric spectroscopy. A broad relaxation mode in the megahertz range with a huge dielectric constant of approximate to 10(6) emer ...

2008

From Mott state to superconductivity in 1T-TaS2

Helmuth Berger, László Forró, Eduard Tutis, Ana Akrap, Balazs Sipos

The search for the coexistence between superconductivity and other collective electronic states in many instances promoted the discovery of novel states of matter. The manner in which the different types of electronic order combine remains an ongoing puzzl ...

2008

Influence of chemical substitutions on the charge instability of BaVS3

Helmuth Berger, László Forró, Ana Akrap

We study the influence of Sr substitutions on the structural counterpart of the MI transition of BaVS3. When Sr content increases, the commensurate CDW modulation of pure BaVS3 is changed into an incommensurate short range modulation that we attribute to a ...

2008

Influence of point defects on the metal-insulator transition in BaVS3

Helmuth Berger, László Forró, Aurore Rudolf, Ana Akrap

2008

Competing orders in strongly correlated systems studied by transport measurements

Ana Akrap

Competing orders in strongly correlated systems lead to rich phase diagrams comprising many electronic phases, such as superconductivity, charge/spin density wave, charge order, or bad metallicity. These phases are generically sensitive to a variety of par ...

EPFL2008

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Ana Akrap

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Manifestation of the spin textures in the thermopower of MnSi

BaVS3 probed by V L edge x-ray absorption spectroscopy

Charge ordering in substituted and non-stoichiometric BaVS3

Electrical transport in charge-ordered Fe2OBO3: Resistive switching and pressure effects

Transport and magnetic properties of BaVSe3

Magnetic anisotropy of paramagnetic and ferromagnetically ordered state of single crystal BaVSe3

Collective charge excitations below the metal-to-insulator transition in BaVS3

From Mott state to superconductivity in 1T-TaS2

Influence of chemical substitutions on the charge instability of BaVS3

Influence of point defects on the metal-insulator transition in BaVS3

Competing orders in strongly correlated systems studied by transport measurements

Resistive switching in beta-SrV6O15

Pressure-induced tuning of phase transition and role of disorder in electrical transport properties of beta-Sr_xV_6O_15

C6Yb and graphite: A comparative high-pressure transport study

High-pressure resistivity and thermoelectric power in Yb14MnSb11

Manifestations of fine features of the density of states in the transport properties of KOs2O6

Pressure dependence of the superconducting transition temperature in C6Yb and C6Ca

Separation of Orbital Contributions to the Optical Conductivity of BaVS3