Zobrazeno 1 - 10
of 66
pro vyhledávání: '"Gopar, Victor A."'
Autor:
Encarnación, Pablo, Gopar, Victor A.
Publikováno v:
Phys. Rev. B 110, 195415 (2024)
Voltage is a sensitive quantity to quantum interference in coherent electronic transport. We study the voltage fluctuations in disordered graphene nanoribbons with zigzag and armchair edge terminations in a four-terminal configuration. We show that t
Externí odkaz:
http://arxiv.org/abs/2409.06891
Publikováno v:
Waves in Random and Complex Media, 2024
The statistics of transmission through random 1D media are generally presumed to be universal and to depend only upon a single dimensionless parameter-the ratio of the sample length and the mean free path, s = L/l. Here, we show in numerical simulati
Externí odkaz:
http://arxiv.org/abs/2211.02532
We study the time delay of reflected and transmitted waves in 1D disordered media with high transmission. Highly transparent and translucent random media are found in nature or can be synthetically produced. We perform numerical simulations of microw
Externí odkaz:
http://arxiv.org/abs/2210.13228
Publikováno v:
Physical Review B 104, 104204 (2021)
We show in random matrix theory, microwave measurements, and computer simulations that the mean free path of a random medium and the strength and position of an embedded reflector can be determined from radiation scattered by the system. The mean fre
Externí odkaz:
http://arxiv.org/abs/2109.11922
Publikováno v:
L. A. Razo-L\'opez, A. Z. Genack, and V. A. Gopar, Statistics of coherent waves inside media with L\'evy disorder, Phys. Rev. Res. 3, 023035 (2021)
Structures with heavy-tailed distributions of disorder occur widely in nature. The evolution of such systems, as in foraging for food or the occurrence of earthquakes is generally analyzed in terms of an incoherent series of events. But the study of
Externí odkaz:
http://arxiv.org/abs/2102.05423
Autor:
Molina, Rafael A., Gopar, Victor A.
In models of hopping disorder in the absence of external fields and at the band center, the electrons are less localized in space than the standard exponential Anderson localization. A signature of this anomalous localization is the square root depen
Externí odkaz:
http://arxiv.org/abs/2003.06372
Publikováno v:
Phys. Rev. Lett. 124, 057401 (2020)
Disorder is more the rule than the exception in natural and synthetic materials. Nonetheless, wave propagation within inhomogeneously disordered materials has received scant attention. We combine microwave experiments and theory to find the spatial v
Externí odkaz:
http://arxiv.org/abs/1912.11242
Publikováno v:
Phys. Rev. E 96, 062141 (2017)
We study the random fluctuations of the transmission in disordered quasi-one-dimensional systems such as disordered waveguides and/or quantum wires whose random configurations of disorder are characterized by density distributions with a long tail kn
Externí odkaz:
http://arxiv.org/abs/1711.04966
Publikováno v:
J. Phys. Soc. Jpn. 87, 034701 (2018)
Impurities and defects are ubiquitous in topological insulators (TIs) and thus understanding the effects of disorder on electronic transport is important. We calculate the distribution of the random conductance fluctuations $P(G)$ of disordered 2D TI
Externí odkaz:
http://arxiv.org/abs/1612.00146
Autor:
Gopar, Victor A.
Publikováno v:
Physica E 77, 23 (2016)
Random fluctuations of the shot-noise power in disordered graphene nanoribbons are studied. In particular, we calculate the distribution of the shot noise of nanoribbons with zigzag and armchair edge terminations. We show that the shot noise statisti
Externí odkaz:
http://arxiv.org/abs/1507.00222