Upcoming Events

Condensed Matter Seminar
Arnab Banerjee (Oak Ridge National Laboratory)
Physics 298
Date: Thursday, February 11, 2016 - 11:30am

In 2006, Alexei Kitaev proposed that certain 2D honeycomb magnets with a strong spin-orbit coupling in the low-spin (S=1/2) ground state and a high degree of bond anisotropy will form a quantum-spin-liquid (QSL). This QSL is special since its excitations can be solved exactly to predict the presence of 2D Majorana Fermions. If realized in a solid-state material, these hold the promise for the technology of lossless topological qubits that survive to high temperatures.

Condensed Matter Seminar
Adriana Moreo (University of Tennessee, ORNL)
Physics 298
Date: Thursday, February 25, 2016 - 11:30am

The phase diagram of electron-doped pnictides as a function of temperature, electronic density, and isotropic quenched disorder strength obtained by means of computational techniques applied to a three-orbital (xz, yz, xy) spin-fermion model with lattice degrees of freedom will be presented. In experiments, chemical doping introduces disorder but in theoretical studies the relationship between electronic doping and the randomly located dopants, with their associated quenched disorder, is difficult to address.

Condensed Matter Seminar
Eduardo Novais (Universidade Federal do ABC, Brazil)
Physics 298
Date: Thursday, March 10, 2016 - 11:30am

title and abstract t.b.a.

Condensed Matter Seminar
Hao Zhang (TU Delft)
Physics 299
Date: Monday, March 21, 2016 - 11:30am

Note the unusual weekday! -- Majorana modes in hybrid superconductor-semiconductor nanowire devices can be probed via tunneling spectroscopy which shows a zero bias peak (ZBP) in differential conductance. However, alternative mechanisms such as disorder or formation of quantum dots can also give rise to ZBPs, and obscure experimental studies of Majoranas. Further, a soft induced superconducting gap presents an outstanding challenge for the demonstration of their topological protection.

Condensed Matter Seminar
Konstantin Matveev (Argonne National Lab)
Physics 298
Date: Thursday, March 24, 2016 - 11:30am

title and abstract t.b.a.

Condensed Matter Seminar
Waseem S. Bakr (Princeton University)
Physics 298
Date: Thursday, April 7, 2016 - 11:30am

title and abstract t.b.a.