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Ana Akrap

Cette personne a quitté l’EPFL

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Publications associées (37)

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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

Enhanced low-temperature thermoelectrical properties of BiTeCl grown by topotactic method

Helmuth Berger, László Forró, Arnaud Magrez, Richard Gaal, Philippe Bugnon, Ana Akrap, Jacim Jacimovic, Sergiy Katrych, Andrea Pisoni, Xavier François Mettan

We developed a topotactic strategy to grow BiTeCl single crystals. Structural characterization by means of X-ray diffraction was performed, and the high crystallinity of the material was proven. Measurements of the thermoelectrical coefficients electrical ...

Pergamon-Elsevier Science Ltd2014

Bi2Te3-xSex series studied by resistivity and thermopower

László Forró, Ana Akrap

We study the detailed temperature and composition dependence of the resistivity, rho(T), and thermopower, S(T), for a series of layered bismuth chalcogenides Bi2Te3-xSex, and report the stoichiometry dependence of the optical band gap. In the resistivity o ...

IOP Publishing - EPL Association2014

Addressing shape and extent of Weyl cones in TaAs by Landau level spectroscopy

Ana Akrap

TaAs is a prime example of a topological semimetal with two types of Weyl nodes, W-1 and W-2, whose bulk signatures have proven elusive. We apply Landau level spectroscopy to crystals with multiple facets and identify-among other low-energy excitations bet ...

AMER PHYSICAL SOC2022

From Mott state to superconductivity in 1T-TaS2

Helmuth Berger, László Forró, 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

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

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

László Forró, Richard Gaal, Ana Akrap, Neven Barisic

2007

Low-energy excitations in type-II Weyl semimetal T-d-MoTe2 evidenced through optical conductivity

Ana Akrap

Molybdenum ditelluride, MoTe2, is a versatile material where the topological phase can be readily tuned by manipulating the associated structural phase transition. The fine details of the band structure of MoTe2, key to understanding its topological proper ...

AMER PHYSICAL SOC2020

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

László Forró, Helmuth Berger, Ana Akrap

2008

Separation of Orbital Contributions to the Optical Conductivity of BaVS3

László Forró, Helmuth Berger, Richard Gaal, Ana Akrap, Neven Barisic

2006

Electronic properties of incommensurately modulated novel and complex materials

László Forró, Oleg Yazyev, Philip Johannes Walter Moll, Alla Arakcheeva, Ana Akrap, Sergiy Katrych, Gabriel Albert Autes, Edoardo Martino

INT UNION CRYSTALLOGRAPHY2018

Resistive switching in beta-SrV6O15

László Forró, Richard Gaal, Ana Akrap

EDP Sciences, Springer2008

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

Ana Akrap

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

Enhanced low-temperature thermoelectrical properties of BiTeCl grown by topotactic method

Bi2Te3-xSex series studied by resistivity and thermopower

Addressing shape and extent of Weyl cones in TaAs by Landau level spectroscopy

From Mott state to superconductivity in 1T-TaS2

BaVS3 probed by V L edge x-ray absorption spectroscopy

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

Low-energy excitations in type-II Weyl semimetal T-d-MoTe2 evidenced through optical conductivity

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

Separation of Orbital Contributions to the Optical Conductivity of BaVS3

Electronic properties of incommensurately modulated novel and complex materials

Resistive switching in beta-SrV6O15

Influence of chemical substitutions on the charge instability of BaVS3

Pressure dependence of the superconducting transition temperature in C6Yb and C6Ca

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