Výsledky vyhledávání - "Tompsett, D. A."

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Superconductivity in the vicinity of a ferroelectric quantum phase transition

Autor: Rowley, S. E., Enderlein, C., de Oliveira, J. Ferreira, Tompsett, D. A., Saitovitch, E. Baggio, Saxena, S. S., Lonzarich, G. G.

Superconductivity has been observed in doped SrTiO$_3$ at charge-carrier densities below 10$^{18}$ cm$^{-3}$, where the density of states at the Fermi level of the itinerant electrons is several orders of magnitude lower than that of conventional met

Externí odkaz: http://arxiv.org/abs/1801.08121

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Ambient Pressure Structural Quantum Critical Point in the Phase Diagram of (Ca$_x$Sr$_{1-x}$)$_3$Rh$_4$Sn$_{13}$

Autor: Goh, S. K., Tompsett, D. A., Saines, P. J., Chang, H. C., Matsumoto, T., Imai, M., Yoshimura, K., Grosche, F. M.

Publikováno v: Phys. Rev. Lett. 114, 097002 (2015)

The quasi-skutterudite superconductor Sr$_3$Rh$_4$Sn$_{13}$ features a pronounced anomaly in electrical resistivity at $T^*\sim$138 K. We show that the anomaly is caused by a second-order structural transition, which can be tuned to 0 K by applying p

Externí odkaz: http://arxiv.org/abs/1409.2238

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The Role of Crystal Symmetry in the Magnetic Instabilities of $\beta$-YbAlB$_4$ and $\alpha$-YbAlB$_4$

Autor: Tompsett, D. A., Yin, Z. P., Lonzarich, G. G., Pickett, W. E.

Publikováno v: Phys. Rev. B 82, 235101 (2010)

Density functional theory methods are applied to investigate the properties of the new superconductor $\beta$-YbAlB$_4$ and its polymorph $\alpha$-YbAlB$_4$. We utilize the generalized gradient approximation + Hubbard U (GGA+U) approach with spin-orb

Externí odkaz: http://arxiv.org/abs/1012.1249

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Doping driven magnetic instabilities and quantum criticality of NbFe$_{2}$

Autor: Tompsett, D. A., Needs, R. J., Grosche, F. M., Lonzarich, G. G.

Publikováno v: Phys. Rev. B 82, 155137 (2010)

Using density functional theory we investigate the evolution of the magnetic ground state of NbFe$_{2}$ due to doping by Nb-excess and Fe-excess. We find that non-rigid-band effects, due to the contribution of Fe-\textit{d} states to the density of s

Externí odkaz: http://arxiv.org/abs/1010.6199

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CaFe2As2: a Springboard to Investigating Fe-Pnictide Superconductivity

Autor: Tompsett, D. A., Lonzarich, G. G.

We present detailed electronic structure calculations for CaFe2As2. We investigate in particular the `collapsed' tetragonal and orthorhombic regions of the temperature-pressure phase diagram and find properties that distinguish CaFe2As2 from other Fe

Externí odkaz: http://arxiv.org/abs/0902.4859

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The role of f -electrons in the Fermi surface of the heavy fermion superconductor beta-YbAlB4

Autor: O'Farrell, E. C. T., Tompsett, D. A., Sebastian, S. E., Harrison, N., Capan, C., Balicas, L., Kuga, K., Matsuo, T., Tokunaga, M., Nakatsuji, S., Csanyi, G., Fisk, Z., Sutherland, M. L.

We present a detailed quantum oscillation study of the Fermi surface of the recently discovered Yb-based heavy fermion superconductor beta-YbAlB4 . We compare the data, obtained at fields from 10 to 45 Tesla, to band structure calculations performed

Externí odkaz: http://arxiv.org/abs/0811.4417

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Hard Core Bosons on the Triangular Lattice at Zero Temperature: A Series Expansion Study

Autor: Oitmaa, J., Zheng, Weihong, Tompsett, D.

We use high order linked cluster series to investigate the hard core boson model on the triangular lattice, at zero temperature. Our expansions, in powers of the hopping parameter $t$, probe the spatially ordered `solid' phase and the transition to a

Externí odkaz: http://arxiv.org/abs/cond-mat/0510769

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