Publications related to Non-universal behaviour of paraconductivity in YBa2Cu3O7-δ films

Nonlinear Midinfrared Photothermal Spectroscopy Using Zharov Splitting and Quantum Cascade Lasers

Hatice Altug, Shyamsunder Erramilli, Mi Kyung Hong

We report on the Mid-infrared nonlinear photothermal spectrum of the neat liquid crystal 4-octyl-4'-cyanobiphenyl (8CB) using a tunable Quantum Cascade Laser (QCL). The nonequilibrium steady state characterized by the nonlinear photothermal infrared respon ...

2014

Huge critical current density and tailored superconducting anisotropy in SmFeAsO0.8F0.15 by low-density columnar-defect incorporation

Janusz Andrzej Karpinski, Sergiy Katrych, Yihan Jia

Iron-based superconductors could be useful for electricity distribution and superconducting magnet applications because of their relatively high critical current densities and upper critical fields. SmFeAsO0.8F0.15 is of particular interest as it has the h ...

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

Transition from slow Abrikosov to fast moving Josephson vortices in iron pnictide superconductors

Philip Johannes Walter Moll

Iron pnictides are layered high Tc superconductors with moderate material anisotropy and thus Abrikosov vortices are expected in the mixed state. Yet, we have discovered a distinct change in the nature of the vortices from Abrikosov-like to Josephson-like ...

2013

Realization of higher Wess-Zumino-Witten models in spin chains

Frédéric Mila, Salvatore Manmana, Frédéric Alexis Michaud

Building on the generalization of the exactly dimerized Majumdar-Ghosh ground state to arbitrary spin S for the Heisenberg chain with a three-site term (Si-1 . S-i)(S-i . Si+1) + H.c., we use density-matrix renormalization group simulations and exact diago ...

2013

Pr4Fe2As2Te1-xO4: A layered FeAs-based superconductor

László Forró, Richard Gaal, Janusz Andrzej Karpinski, Andrea Pisoni, Sergiy Katrych

We report crystal growth at high pressure, structure determination, and magnetic and transport studies of an oxypnictide superconductor Pr4Fe2As2Te1-xO4. Its structure resembles the known 1111 phase except for the considerably larger c lattice constant and ...

Amer Physical Soc2013

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

High-pressure flux growth, structural, and superconducting properties ofLnFeAsO (Ln=Pr, Nd, Sm) single crystals

Philip Johannes Walter Moll, Janusz Andrzej Karpinski, Sergiy Katrych

Single crystals of the LnFeAsO (Ln1111, Ln = Pr, Nd, and Sm) family with lateral dimensions up to 1 mm were grown from NaAs and KAs flux at high pressure. The crystals are of good structural quality and become superconducting when O is partially substitute ...

2012

Electric field effect on superconductivity in $La_{2-x}$$Sr_{x}$$CuO_{4}$

Davor Pavuna, Guy Joseph Günter Dubuis, Ivan Bozovic

We demonstrate a method to tune the carrier concentration of a high temperature superconductor over a wide range, using an applied electric field. Thin film devices were made in an electrical double layer transistor configuration utilizing an ionic liquid. ...

American Institute of Physics2012

Non-universal behaviour of paraconductivity in YBa2Cu3O7-δ films

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Nonlinear Midinfrared Photothermal Spectroscopy Using Zharov Splitting and Quantum Cascade Lasers

Huge critical current density and tailored superconducting anisotropy in SmFeAsO0.8F0.15 by low-density columnar-defect incorporation

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

Transition from slow Abrikosov to fast moving Josephson vortices in iron pnictide superconductors

Realization of higher Wess-Zumino-Witten models in spin chains

Pr4Fe2As2Te1-xO4: A layered FeAs-based superconductor

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

High-pressure flux growth, structural, and superconducting properties ofLnFeAsO (Ln=Pr, Nd, Sm) single crystals

Electric field effect on superconductivity in $La_{2-x}$$Sr_{x}$$CuO_{4}$

Nonlinear Midinfrared Photothermal Spectroscopy Using Zharov Splitting and Quantum Cascade Lasers

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

Transition from slow Abrikosov to fast moving Josephson vortices in iron pnictide superconductors

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

Huge critical current density and tailored superconducting anisotropy in SmFeAsO0.8F0.15 by low-density columnar-defect incorporation

Pr4Fe2As2Te1-xO4: A layered FeAs-based superconductor

Electric field effect on superconductivity in $La_{2-x}$$Sr_{x}$$CuO_{4}$

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

High-pressure flux growth, structural, and superconducting properties ofLnFeAsO (Ln=Pr, Nd, Sm) single crystals

Realization of higher Wess-Zumino-Witten models in spin chains