Publications related to Tunneling processes through magnetic impurities on superconducting surfaces: Yu-Shiba-Rusinov states and the Josephson effect

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

Electron hopping at the Si(111):B-root 3 surface: Insight from local impurity spectroscopy

Cédric Tournier-Colletta

Boron vacancies at the Si( 111):B-root 3 surface are model systems in the comprehension of strongly correlated semiconductor surfaces. By using scanning tunneling spectroscopy, the origin of the single-vacancy electronic structure is addressed. It is shown ...

American Physical Society2013

Efficient DFT+U calculations of ballistic electron transport: Application to Au monatomic chains with a CO impurity

Gabriele Sclauzero

An efficient method for computing the Landauer-Buttiker conductance of an open quantum system within DFT + U is presented. The Hubbard potential is included in electronic-structure and transport calculations as a simple renormalization of the nonlocal pseu ...

Amer Physical Soc2013

Nanoscale multifunctional sensor formed by a Ni nanotube and a scanning Nb nanoSQUID

Dirk Grundler, Daniel Rüffer, Eleonora Russo

Nanoscale magnets might form the building blocks of next generation memories. To explore their functionality, magnetic sensing at the nanoscale is key. We present a multifunctional combination of a nanometer-sized superconducting quantum interference devic ...

American Physical Society2013

Thermopower as a Unique Tool to Probe Quantum Phase Transitions

Stevan Arsenijevic

In my thesis, transport measurements such as resistivity and, more importantly, thermopower S, were used to explore the phase diagram of bad metals. Bad metals are electronically correlated systems whose ground state lies close to a quantum phase transitio ...

EPFL2012

Spin excitations in a single La2CuO4 layer

Henrik Moodysson Rønnow, Thorsten Schmitt, Bastien Dalla Piazza, Ivan Bozovic

Cuprates and other high-temperature superconductors consist of two-dimensional layers that are crucial to their properties. The dynamics of the quantum spins in these layers lie at the heart of the mystery of the cuprates(1-7). In bulk cuprates such as La2 ...

Nature Publishing Group2012

Magnetic hourglass dispersion and its relation to high-temperature superconductivity in iron-tuned Fe

Henrik Moodysson Rønnow, Bastien Dalla Piazza, Arash Alahgholipour Omrani, Nikolay Tsyrulin

High-temperature superconductivity remains arguably the greatest enigma of condensed matter physics. The discovery of iron-based high-temperature superconductors [1, 2] has renewed the importance of understanding superconductivity in materials susceptible ...

Institute of Physics (IoP) and Deutsche Physikalische Gesellschaft2012

Anticollinear magnetic order induced by impurities in the frustrated Heisenberg model of pnictides

Frédéric Mila, Cédric Weber

We present Monte Carlo simulations for a classical antiferromagnetic Heisenberg model with both nearest (J(1)) and next-nearest (J(2)) exchange couplings on the square lattice in the presence of nonmagnetic impurities. We show that the order-by-disorder en ...

2012

Atom-specific spin mapping and buried topological states in a homologous series of topological insulators

Jan Hugo Dil

A topological insulator is a state of quantum matter that, while being an insulator in the bulk, hosts topologically protected electronic states at the surface. These states open the opportunity to realize a number of new applications in spintronics and qu ...

2012

Development of a Millikelvin Scanning Tunneling Microscope for Applications in Ultra High Vacuum and High Magnetic Fields

Maximilian Assig

In this thesis we discuss the realization of a scanning tunneling microscope (STM) operating at temperatures below 20 mK. This is accomplished by attaching the STM to a dilution refrigerator. We can apply high magnetic fields up to 14 T perpendicular and 0 ...

EPFL2011

Tunneling processes through magnetic impurities on superconducting surfaces: Yu-Shiba-Rusinov states and the Josephson effect

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

Electron hopping at the Si(111):B-root 3 surface: Insight from local impurity spectroscopy

Efficient DFT+U calculations of ballistic electron transport: Application to Au monatomic chains with a CO impurity

Nanoscale multifunctional sensor formed by a Ni nanotube and a scanning Nb nanoSQUID

Thermopower as a Unique Tool to Probe Quantum Phase Transitions

Spin excitations in a single La2CuO4 layer

Magnetic hourglass dispersion and its relation to high-temperature superconductivity in iron-tuned Fe

Anticollinear magnetic order induced by impurities in the frustrated Heisenberg model of pnictides

Atom-specific spin mapping and buried topological states in a homologous series of topological insulators

Development of a Millikelvin Scanning Tunneling Microscope for Applications in Ultra High Vacuum and High Magnetic Fields

Electron hopping at the Si(111):B-root 3 surface: Insight from local impurity spectroscopy

Nanoscale multifunctional sensor formed by a Ni nanotube and a scanning Nb nanoSQUID

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

Efficient DFT+U calculations of ballistic electron transport: Application to Au monatomic chains with a CO impurity

Thermopower as a Unique Tool to Probe Quantum Phase Transitions

Spin excitations in a single La2CuO4 layer

Atom-specific spin mapping and buried topological states in a homologous series of topological insulators

Development of a Millikelvin Scanning Tunneling Microscope for Applications in Ultra High Vacuum and High Magnetic Fields

Anticollinear magnetic order induced by impurities in the frustrated Heisenberg model of pnictides

Magnetic hourglass dispersion and its relation to high-temperature superconductivity in iron-tuned Fe