Results 1 to 10 of about 12,182,554 (372)

Ring currents modulate optoelectronic properties of aromatic chromophores at 25 T. [PDF]

Proc Natl Acad Sci U S A, 2020
Significance Applying magnetic fields is a powerful strategy to study the electronic properties of inorganic materials and paramagnetic organic systems due to their straightforward Zeeman interactions. We demonstrate with magnetic fields almost 1 million
Kudisch B, Maiuri M, Moretti L, Oviedo MB, Wang L, Oblinsky DG, Prud'homme RK, Wong BM, McGill SA, Scholes GD.   +9 more
europepmc   +4 more sources

Global Aromatic Ring Currents in Neutral Porphyrin Nanobelts. [PDF]

ACS Nano
The ability of a ring-shaped molecule to sustain a global aromatic or antiaromatic ring current when placed in a magnetic field indicates that its electronic wave function is coherently delocalized around its whole circumference.
Vitek M, Deng JR, Anderson HL, Rončević I.   +3 more
europepmc   +4 more sources

Polariton ring currents and circular dichroism of Mg-porphyrin in a chiral cavity. [PDF]

Chem Sci, 2022
By placing Mg-porphyrin molecules in a chiral optical cavity, time reversal symmetry is broken, and polariton ring currents can be generated with linearly polarized light, resulting in a circular dichroism signal. Since the electronic state degeneracy in
Sun S, Gu B, Mukamel S.
europepmc   +2 more sources

Equilibrium currents in a Corbino graphene ring [PDF]

Condensed Matter Physics, 2014
We address the description of a graphene Corbino disk in the context of a tight binding approach that includes both kinetic and Rashba spin-orbit coupling due to an external out-of-plane electric field.
A. López, N. Bolívar, E. Medina, B. Berche   +3 more
doaj   +9 more sources

CURRENT MAGNIFICATION AND CIRCULATING CURRENTS IN MESOSCOPIC RINGS [PDF]

Physica B: Condensed Matter, 1995
We show that several novel effects related to persistent currents can arise in open systems, which have no analogue in closed or isolated systems. We have considered a system of a metallic ring coupled to two electron reservoirs.
A.M. Jayannavar, Abraham, Ambegaokar, Büttiker, Büttiker, Büttiker, Chandrasekhar, Cheung, Entin-Wohlman, Jayannavar, Jayannavar, Levy, Loss, Mailly, Montambaux, P. Singha Deo, Shaw, Singha Deo, Singha Deo, T.P. Pareek, Washburn, Xia   +21 more
core   +2 more sources

Disentangling global and local ring currents. [PDF]

Chem Sci, 2023
Aromatic or antiaromatic ring currents – why not both? We use experimental NMR chemical shifts to identify both local and global ring currents in π-conjugated molecules.
Bradley D, Jirásek M, Anderson HL, Peeks MD.   +3 more
europepmc   +4 more sources

Laser-Control of Ultrafast π-Electron Ring Currents in Aromatic Molecules: Roles of Molecular Symmetry and Light Polarization

Applied Sciences, 2018
Being motivated by the recent progress in attosecond laser technology, we theoretically explore the strategy of inducing ultrafast electron dynamics inherent to aromatic molecules, i.e., ring currents by means of polarized laser pulses. The main topic of
Manabu Kanno, Hirohiko Kono, Yuichi Fujimura   +2 more
doaj   +2 more sources

Bistability of persistent currents in mesoscopic rings [PDF]

, 1996
We study the persistent currents flowing in a mesoscopic ring threaded by a magnetic flux and connected to a stub of finite length. Multistability processes and Coulomb blockade are demonstrated to be present in this system.
Büttiker M, Büttiker M, Chiappe G, E V Anda, G Chiappe, Greens C, Kieseling F, Sofo O, V Ferrari   +8 more
core   +2 more sources

The making of ring currents

Physical Chemistry Chemical Physics, 2016
The π-electron diatropic ring current emerging throughout the trimerization of acetylene to benzene.
MONACO, Guglielmo, ZANASI, Riccardo
openaire   +3 more sources

Spontaneous currents in a bosonic ring [PDF]

Acta Physica Polonica A, 2016
Nonequilibrium dynamics of noninteracting bosons in a one-dimensional ring-shaped lattice is studied by means of the Kinetic Monte Carlo method. The system is approximated by the classical XY model (the kinetic term is neglected) and then the simulations
Makiela, Damian, Maska, Maciej M.
core   +5 more sources