46 citations · 158 across the 6 of their papers we have counts for
6 papers
Helical spin thermoelectrics controlled by a side-coupled magnetic quantum dot in the quantum spin Hall state
P. Roura-Bas, Liliana. Arrachea, Eduardo Fradkin
We study the thermoelectric response of a device containing a pair of helical edge states contacted at the same temperature and chemical potential and connected to an exter…
Microscopic theory of vibronic dynamics in linear polyenes
L. Arrachea, A. A. Aligia, G. E. Santoro
We propose a novel approach to calculate dynamical processes at ultrafast time scale in molecules in which vibrational and electronic motions are strongly mixed. The relevant elect…
The infinite-range quantum random Heisenberg magnet
L. Arrachea, M. J. Rozenberg
We study with exact diagonalization techniques the Heisenberg model for a system of SU(2) spins with S=1/2 and random infinite-range exchange interactions. We calculate the critica…
Current oscillations in a metallic ring threaded by a time-dependent magnetic flux
L. Arrachea
We study a mesoscopic metallic ring threaded by a magnetic flux which varies linearly in time PhiM(t)=Phi t with a formalism based in Baym-Kadanoff-Keldysh non-equilibrium Green fu…
Qualitative understanding of the sign of t' asymmetry in the extended t-J Model and relevance for pairing properties
G. B. Martins, J. C. Xavier, L. Arrachea +1
Numerical calculations illustrate the effect of the sign of the next nearest-neighbor hopping term t' on the 2-hole properties of the t-t'-J model. Working mainly on 2-leg ladders,…
Pairing Correlations in a Generalized Hubbard Model for the Cuprates
L. Arrachea, A. Aligia
Using numerical diagonalization of a 4x4 cluster, we calculate on-site s, extended s and d pairing correlation functions (PCF) in an effective generalized Hubbard model for the cup…