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Possible spin-orbit driven spin-liquid ground state in the double perovskite phase of Ba

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Spiral magnetic phase in Li-doped Na2IrO3

Sándor Tóth, Kazimierz Conder

The doping of the honeycomb lattice compound Na2IrO3 with cations having smaller ionic radius such as lithium was supposed to drive the system into a Kitaev spin liquid phase. Even at the smallest doping level the long range magnetic order, present in the ...

American Physical Society2015

Combined and Distinct Contributions of Different Carbon Nano-Forms in Polypropylene

Nikolaos Nianias

In the present work a thorough investigation of how small amounts of multiwall carbon nanotubes (CNTs), nanodiamonds (NDs), and combinations between them affect the properties and performance of polypropylene (PP) is presented. An improvement on the mechan ...

Wiley-V C H Verlag Gmbh2015

Pressure effect on magnetism and multiferroicity in Mn2GeO4

Jonathan White

The effect of high pressure exceeding 6 GPa on magnetism and multiferroicity was investigated for the olivine Mn2GeO4 that shows successive magnetic transitions at ambient pressure and a ferroelectric ground state driven by spin- spiral order. We measured ...

Amer Physical Soc2014

Bose-Einstein condensation of light in a cavity

The paper considers Bose-Einstein condensation (BEC) of light in a cavity with a medium. In the framework of a two-level model we show the effect of gaseous medium on the critical temperature of light condensation in the system. Transition of the system to ...

American Physical Society2014

Possible spin-orbit driven spin-liquid ground state in the double perovskite phase of Ba3YIr2O9

Henrik Moodysson Rønnow, Arash Alahgholipour Omrani

We report the structural transformation of hexagonal Ba3YIr2O9 to a cubic double perovskite form (stable in ambient conditions) under an applied pressure of 8 GPa at 1273 K. While the ambient pressure synthesized sample undergoes long-range magnetic orderi ...

Amer Physical Soc2013

Decoupling of Magnetic Resonance Signals in Time and Frequency Domain

Nuclear magnetic resonance (NMR) was discovered in the first half of the 20th century. Today, neither analytical chemistry without NMR spectroscopy nor medical diagnostics without magnetic resonance imaging (MRI) could be imagined. A magnetic resonance sig ...

EPFL2013

Single crystal study of the heavy-fermion antiferromagnet CePt2In7

Philip Johannes Walter Moll

We report the synthesis, structure, and physical properties of single crystals of CePt2In7. Single crystal x-ray diffraction analysis confirms the tetragonal I4/mmm structure of CePt2In7 with unit cell parameters a = 4.5886(6) Å, c = 21.530(6) Å and V = 45 ...

2012

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 phase diagram of the antiferromagnetic cobalt tellurate Co3TeO6

Helmuth Berger, Wei Li

In this study, we measured the temperature-dependent magnetic susceptibility [chi(T)], ac magnetic susceptibility [chi(ac)(T)], specific heat [C-p(T)], and high-field magnetization [M(H)] of a newly synthesized single-crystalline material, Co3TeO6. Two tra ...

2011

simple physical model for the simultaneous rationalisation of melting points and heat capacities of ionic liquids

Paul Joseph Dyson

The anal. of potential energy surfaces of ion pairs within the framework of an anharmonic oscillator model allows rationalization and prediction of m.ps. (Tmp) and heat capacities (Cp) of ionic liqs. (ILs) comprising di- and trialkylimidazolium or tetraalk ...

Royal Society of Chemistry2010