Publications related to Thermopower as a Unique Tool to Probe Quantum Phase Transitions

Nature of the Bad Metallic Behavior of Fe1.06Te Inferred from Its Evolution in the Magnetic State

We investigate with angle-resolved photoelectron spectroscopy the changes of the Fermi surface and the main bands from the paramagnetic state to the antiferromagnetic (AFM) state occurring below 72 K in Fe1.06Te. The evolution is completely different from ...

Amer Physical Soc2013

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 ( ...

Epl Association, European Physical Society2013

Emergence and Detection of Exotic Phases in Spin-1 Systems

Frédéric Alexis Michaud

This work is devoted to the study of spin S = 1 systems, and more precisely to the emergence of exotic quantum phases in such systems, and to the establishment of tools to observe such phases. It is split in four main chapters. In the first chapter, we sho ...

EPFL2013

Anisotropic breakdown of Fermi liquid quasiparticle excitations in overdoped La2−xSrxCuO4

Joël Mesot, Johan Juul Chang, Martin Mansson

High-temperature superconductivity emerges from an un-conventional metallic state. This has stimulated strong efforts to understand exactly how Fermi liquids breakdown and evolve into an un-conventional metal. A fundamental question is how Fermi liquid qua ...

Nature Publishing Group2013

Signatures of quantum criticality in the thermopower of Ba(Fe1-xCox)(2)As-2

László Forró, Richard Gaal, Stevan Arsenijevic

We demonstrate that the thermopower (S) can be used to probe the spin fluctuations (SFs) in proximity to the quantum critical point (QCP) in Fe-based superconductors. The sensitivity of S to the entropy of charge carriers allows us to observe an increase o ...

Amer Physical Soc2013

On field effect studies and superconductor-insulator transition in high-Tc cuprates

Davor Pavuna, Guy Joseph Günter Dubuis, Ivan Bozovic

We summarize previous field effect studies in high-T (c) cuprates and then discuss our method to smoothly tune the carrier concentration of a cuprate film over a wide range using an applied electric field. We synthesized epitaxial one-unit-cell thick films ...

Springer Berlin Heidelberg2013

Critical Resistance at the Superconductor-Insulator Transition in Hole-Doped Cuprates

Davor Pavuna, Guy Joseph Günter Dubuis, Ivan Bozovic

Here, we show that in several p-type cuprates, the superconductor-to-insulator transition (SIT) occurs at the critical sheet resistance approximately equal to the quantum resistance of pairs, RQ=h/4

e^{2}

=6.5 kΩ. In a relatively broad range of temperature ...

Springer Verlag2013

Non-local quasiparticle excitations

Johan Juul Chang

A poster discussion how Landau Fermi-liquid quasiparticles can breakdown in momentum space. ...

2013

Pseudopotential formalism for fractional Chern insulators

Ronny Thomale

Recently, generalizations of fractional quantum Hall (FQH) states known as fractional quantum anomalous Hall or, equivalently, fractional Chern insulators states, have been realized in lattice models. Ideal wave functions such as the Laughlin wave function ...

Amer Physical Soc2013

Classical and Quantum Critical Phenomena in the Dipolar Antiferromagnet LiErF4

Neda Nikseresht Ghanepour

The collective behavior of systems consisting of interacting dipoles is a subject of considerable studies. The anisotropic nature of such interactions opens an arena to explore fundamental questions in correlated electron physics, ranging from quantum enta ...

EPFL2012

Thermopower as a Unique Tool to Probe Quantum Phase Transitions

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Nature of the Bad Metallic Behavior of Fe1.06Te Inferred from Its Evolution in the Magnetic State

Manifestation of the spin textures in the thermopower of MnSi

Emergence and Detection of Exotic Phases in Spin-1 Systems

Anisotropic breakdown of Fermi liquid quasiparticle excitations in overdoped La2−xSrxCuO4

Signatures of quantum criticality in the thermopower of Ba(Fe1-xCox)(2)As-2

On field effect studies and superconductor-insulator transition in high-Tc cuprates

Critical Resistance at the Superconductor-Insulator Transition in Hole-Doped Cuprates

Non-local quasiparticle excitations

Pseudopotential formalism for fractional Chern insulators

Classical and Quantum Critical Phenomena in the Dipolar Antiferromagnet LiErF4

Emergence and Detection of Exotic Phases in Spin-1 Systems

Anisotropic breakdown of Fermi liquid quasiparticle excitations in overdoped La2−xSrxCuO4

Classical and Quantum Critical Phenomena in the Dipolar Antiferromagnet LiErF4

Nature of the Bad Metallic Behavior of Fe1.06Te Inferred from Its Evolution in the Magnetic State

Signatures of quantum criticality in the thermopower of Ba(Fe1-xCox)(2)As-2

Manifestation of the spin textures in the thermopower of MnSi

Critical Resistance at the Superconductor-Insulator Transition in Hole-Doped Cuprates

On field effect studies and superconductor-insulator transition in high-Tc cuprates

Non-local quasiparticle excitations

Pseudopotential formalism for fractional Chern insulators