We investigate topological and disorder effects in non-Hermitian systems with chiral symmetry. The system under consideration consists a finite Su-Schrieffer-Heeger chain to which two semi-infinite leads are attached. lacks the parity-time time-reversal symmetries is appropriate for study of quantum transport properties. complex energy spectrum analyzed terms chain-lead coupling strength, shows...

The erasure of a classical bit of information is a dissipative process. The minimum heat produced during this operation has been theorized by Rolf Landauer in 1961 to be equal to kBT ln2 and takes the name of Landauer limit, Landauer reset or Landauer principle. Despite its fundamental importance, the Landauer limit remained untested experimentally for more than fifty years until recently when ...

We report a computational study of conformations and charge transport characteristics of biphenyldithiol (BPDT) monolayers in the (sqrt.3 x sqrt.3)R30 degrees packing ratio sandwiched between Au(111) electrodes. From force-field molecular-dynamics and annealing simulations of BPDT self-assembled monolayers (SAMs) with up to 100 molecules on a Au(111) substrate, we identify an energetically favo...

In this paper we address the topic of inelastic electron scattering in mesoscopic quantum transport. For systems where only elastic scattering is present, Landauer theory provides an adequate description of transport that relates the electronic current to single-particle transmission and reflection probabilities. A formalism proposed recently by Bonc̆a and Trugman facilitates the calculation of ...

We study the quantum noise of the electronic current in a double-barrier system with a single resonant level. In the framework of the Landauer formalism, we treat the double barrier as a quantum coherent scattering region that can exchange photons with a coupled electric field, e.g., a laser beam or a periodic ac bias voltage. As a consequence of the manifold parameters that are involved in thi...

The Landauer formula for dissipationless conductance lies at the heart of modern electronic transport, yet it remains without a clear microscopic basis. We analyze the Landauer formula microscopically, and give a straightforward quantum kinetic derivation for open systems. Some important experimental implications follow. These lie beyond the Landauer result as popularly received. In 1957 Rolf L...

We show, through the use of Landauer-Büttiker (LB) formalism and a tight-binding (TB) model, that transport gap twinned graphene can be tuned application uniaxial strain in direction normal to twin band. Remarkably, we find Egap bears square-root dependence on control parameter ϵx−ϵc, where ϵx is applied ϵc∼19% critical strain. interpret this as evidence criticality underlying continuous phase ...

Shot noise, originating from the discrete nature of electric charge, is generated by scattering processes. Shot-noise measurements have revealed microscopic charge dynamics in various quantum transport phenomena. In particular, beyond single-particle picture, such proved to be powerful ways investigate electron correlation liquids. Here, we review recent progress shot-noise mesoscopic physics. ...