139 citations · 495 across the 21 of their papers we have counts for
4 papers · 1 filter
Correlated electron current and temperature dependence of the conductance of a quantum point contact
C. Sloggett, A. I. Milstein, O. P. Sushkov
We investigate finite temperature corrections to the Landauer formula due to electron-electron interaction within the quantum point contact. When the Fermi level is close to the ba…
Destruction of Neel order and local spin spirals in insulating La_{2-x}Sr_xCuO_4
Andreas Luscher, Alexander I. Milstein, Oleg P. Sushkov
Starting from the t-J model, we derive an effective field theory describing the spin dynamics in the insulating phase of La_{2-x}Sr_xCuO_4, x < 0.055, at low temperature. Using Mon…
The J1-J2 model: First order phase transition versus deconfinement of spinons
J. Sirker, Zheng Weihong, O. P. Sushkov +1
We revisit the phase transition from the Néel ordered to a valence bond solid (VBS) state in the two-dimensional antiferromagnetic Heisenberg model. In the first part we…
Spin-flop transitions and spin-wave gaps in La_2CuO_4
Andreas Luscher, Oleg P. Sushkov
We study the spin-wave spectrum and the spin-flop transitions in La_2CuO_4 in a uniform magnetic field at zero temperature. Using the non-linear sigma-model, we show that a field a…