158 citations · 1.8k across the 54 of their papers we have counts for
43 papers · 1 filter
Spin-polarized electron transmission in DNA-like systems
Miguel A. Sierra, David Sanchez, Rafael Gutierrez +3
The helical distribution of the electronic density in chiral molecules, such as DNA and bacteriorhodopsin, has been suggested to induce a spin-orbit coupling interaction that may l…
Nonlinear chiral refrigerators
David Sanchez, Rafael Sanchez, Rosa Lopez +1
We investigate a mesoscopic refrigerator based on chiral quantum Hall edge channels. We discuss a three-terminal cooling device in which charge transport occurs between a pair of v…
Nanowires: A route to efficient thermoelectric devices
F. Dominguez-Adame, M . Martin-Gonzalez, D. Sanchez +1
Miniaturization of electronic devices aims at manufacturing ever smaller products, from mesoscopic to nanoscopic sizes. This trend is challenging because the increased levels of di…
Nonlinear heat transport in ferromagnetic-quantum dot-superconducting systems
Sun-Yong Hwang, David Sanchez
We analyze the heat current traversing a quantum dot sandwiched between a ferromagnetic and a superconducting electrode. The heat flow generated in response to a voltage bias prese…
How to distinguish between interacting and noninteracting molecules in tunnel junctions
Miguel A. Sierra, David Sánchez, Alvar R. Garrigues +3
Recent experiments demonstrate a temperature control of the electric conduction through a ferrocene-based molecular junction. Here we examine the results in view of determining mea…
Heat current through an artificial Kondo impurity beyond linear response
Miguel A. Sierra, David Sanchez
We investigate the heat current of a strongly interacting quantum dot in the presence of a voltage bias in the Kondo regime. Using the slave- boson mean-field theory, we discuss th…
Probing the energy reactance with adiabatically driven quantum dots
Maria Florencia Ludovico, Liliana Arrachea, Michael Moskalets +1
The tunneling Hamiltonian describes a particle transfer from one region to the other. While there is no particle storage in the tunneling region itself, it has associated certain a…
Reversal of thermoelectric current in tubular nanowires
Sigurdur Ingi Erlingsson, Andrei Manolescu, George Alexandru Nemnes +2
We calculate the charge current generated by a temperature bias between the two ends of a tubular nanowire. We show that in the presence of a transversal magnetic field the current…
Fate of the spin-\frac{1}{2} Kondo effect in the presence of temperature gradients
Miguel A. Sierra, David Sanchez, Rosa Lopez
We consider a strongly interacting quantum dot connected to two leads held at quite different temperatures. Our aim is to study the behavior of the Kondo effect in the presence of…
Time resolved heat exchange in driven quantum systems
Maria Florencia Ludovico, Jong Soo Lim, Michael Moskalets +2
We study time-dependent heat transport in systems composed of a resonant level periodically forced with an external power source and coupled to a fermionic continuum. This simple m…
A hybrid superconducting quantum dot acting as an efficient charge and spin Seebeck diode
Sun-Yong Hwang, David Sanchez, Rosa Lopez
We propose a highly efficient thermoelectric diode device built from the coupling of a quantum dot with a normal or ferromagnetic electrode and a superconducting reservoir. The cur…
Interactions and thermoelectric effects in a parallel-coupled double quantum dot
Miguel A. Sierra, M. Saiz-Bretin, F. Dominguez-Adame +1
We investigate the nonequilibrium transport properties of a double quantum dot system connected in parallel to two leads, including intradot electron-electron interaction. In the a…
Dynamics of energy transport and entropy production in ac-driven quantum electron systems
Maria Florencia Ludovico, Michael Moskalets, David Sanchez +1
We analyze the time-resolved energy transport and the entropy production in ac-driven quantum coherent electron systems coupled to multiple reservoirs at finite temperature. At slo…
Nonlinear phenomena in quantum thermoelectrics and heat
David Sanchez, Rosa Lopez
We review recent developments in nonlinear quantum transport through nanostructures and mesoscopic systems driven by thermal gradients or in combination with voltage biases. Low-di…
Large thermoelectric power and figure of merit in a ferromagnetic-quantum dot-superconducting device
Sun-Yong Hwang, Rosa Lopez, David Sanchez
We investigate the thermoelectric properties of a quantum dot coupled to ferromagnetic and superconducting electrodes. The combination of spin polarized tunneling at the ferromagne…
Quantum point contacts as heat engines
Sebastian Pilgram, David Sanchez, Rosa Lopez
The efficiency of macroscopic heat engines is restricted by the second law of thermodynamics. They can reach at most the efficiency of a Carnot engine. In contrast, heat currents i…
Thermoelectric effects in quantum Hall systems beyond linear response
Rosa Lopez, Sun-Yong Hwang, David Sanchez
We consider a quantum Hall system with an antidot acting as an energy dependent scatterer. In the purely charge case, we find deviations from the Wiedemann-Franz law that take plac…
Cross thermoelectric coupling in normal-superconductor quantum dots
Sun-Yong Hwang, Rosa Lopez, David Sanchez
We discuss the nonlinear current of an interacting quantum dot coupled to normal and superconducting reservoirs with applied voltage and temperature differences. Due to the particl…
Heat asymmetries in nanoscale conductors: The role of decoherence and inelasticity
Javier Arguello-Luengo, David Sanchez, Rosa Lopez
We investigate the heat flow between different terminals in an interacting coherent conductor when inelastic scattering is present. We illustrate our theory with a two-terminal qua…
Nonlinear heat conduction in Coulomb-blockaded quantum dots
Miguel A. Sierra, David Sanchez
We analyze the heat current flowing across interacting quantum dots within the Coulomb blockade regime. Power can be generated by either voltage or temperature biases. In the forme…
Strongly nonlinear thermovoltage and heat dissipation in interacting quantum dots
Miguel A. Sierra, David Sanchez
We investigate the nonlinear regime of charge and energy transport through Coulomb-blockaded quantum dots. We discuss crossed effects that arise when electrons move in response to…
Nonlinear spin-thermoelectric transport in two-dimensional topological insulators
Sun-Yong Hwang, Rosa Lopez, Minchul Lee +1
We consider spin-polarized transport in a quantum spin Hall antidot system coupled to normal leads. Due to the helical nature of the conducting edge states, the screening potential…
Spin and charge thermopower of resonant tunneling diodes
Javier H. Nicolau, David Sanchez
We investigate thermoelectric effects in quantum well systems. Using the scattering approach for coherent conductors, we calculate the thermocurrent and thermopower both in the spi…
Thermoelectric effects in graphene with local spin-orbit interaction
M. I. Alomar, David Sanchez
We investigate the transport properties of a graphene layer in the presence of Rashba spin-orbit interaction. Quite generally, spin-orbit interactions induce spin splittings and mo…