Results 61 to 70 of about 62,639 (186)

Electron correlation induced transverse delocalization and longitudinal confinement in excited states of phenyl-substituted polyacetylenes

, 2000
Electron-electron interactions in general lead to both ground state and excited state confinement. We show, however, that in phenyl-substituted polyacetylenes electron-electron interactions cause enhanced delocalization of quasiparticles in the optically
Ghosh, Haranath, Mazumdar, Sumit, Shukla, Alok   +2 more
core   +1 more source

Quantum dots with two electrons: Singlet-triplet transitions

, 2001
The magnetic character of the ground-state of two electrons on a double quantum dot, connected in series to left and right single-channel leads, is considered.
A. Aharony, A. Aharony, A.L. Chudnovsky, Amnon Aharony, B. Partoens, H.U. Baranger, I.L. Kurland, I.L. Kurland, J. Schmid, J. Vidal, J.J. Palacios, L. Martin-Moreno, M. Brodsky, M. Eto, M. Pustilnik, O. Entin-Wohlman, O. Entin-Wohlman, P.W. Anderson, P.W. Brouwer, S. Tarucha, S. Tarucha, S.D. Lee, W. Izumida, W.A. Harrison, Y. Levinson   +24 more
core   +1 more source

Electron delocalization in gate-tunable gapless silicene [PDF]

Physical Review B, 2013
The application of a perpendicular electric field can drive silicene into a gapless state, characterized by two nearly fully spin-polarized Dirac cones owing to both relatively large spin-orbital interactions and inversion symmetry breaking. Here we argue that since inter-valley scattering from non-magnetic impurities is highly suppressed by time ...
Zhang, Yan-Yang, Tsai, Wei-Feng, Chang, Kai, An, X. -T., Zhang, G. -P., Xie, X. -C., Li, Shu-Shen   +6 more
openaire   +2 more sources

Aromaticity and Antiaromaticity: How to Define Them

Chemistry
Aromaticity and antiaromaticity are concepts that are often used to explain and predict the physical and chemical properties of cyclic conjugated compounds.
Marija Baranac-Stojanović
doaj   +1 more source

Cu-O network dependent core-hole screening in low-dimensional cuprates: A theoretical analysis

, 2000
We analyze the influence of the dimensionality on the Cu 2p_3/2 core level X-ray photoemission spectra of undoped cuprates. Both exchange splitting and delocalization properties are described within one framework using a multi-band Hubbard model.
Becker, K. W., Richter, J., Waidacher, C.   +2 more
core   +1 more source

Dynamical Properties of small Polarons

, 1997
On the basis of the two-site polaron problem, which we solve by exact diagonalization, we analyse the spectral properties of polaronic systems in view of discerning localized from itinerant polarons and bound polaron pairs from an ensemble of single ...
%H. de Raedt, A. S. Alexandrov, A. S. Alexandrov, A. S. Alexandrov, B. Gerlach, C. R. Proeto, E. H. Lieb, E. V. L. de Mello, F. de Pasquale, F. Marsiglio, G. Wellein, H. B. Shore, H. Fehske, H. Froehlich, I. J. Lang, J. Loos, J. Ranninger, J. Ranninger, J. Ranninger, J. Ranninger, J. Ranninger, J. Ranninger, Jian Ma, L. D. Landau, M. Ueta, P. Prelovsek, S. Ciuchi, S. Weber, T. Holstein, W. Stephan   +29 more
core   +1 more source

Delocalization of charge and current in a chiral quasiparticle wave-packet

, 2018
A chiral quasi-particle wave packet (c-QPWP) is defined as a conventional superposition of chiral quasi-particle states corresponding to an interacting electron system in two dimensions (2D) in the presence of Rashba spin-orbit coupling (RSOC).
Sarkar, Subhajit
core   +1 more source

Heavy Fermion superconductor CeCu$_2$Si$_2$ under high pressure: multiprobing the valence crossover

, 2012
The first heavy fermion superconductor CeCu$_2$Si$_2$ has not revealed all its striking mysteries yet. At high pressures, superconductivity is supposed to be mediated by valence fluctuations, in contrast to ambient pressure, where spin fluctuations most ...
A. Georges, A. Pippard, A.-S. Rüetschi, D. Jaccard, G. Seyfarth, K. Miyake, K. Sengupta, S. Watanabe   +7 more
core   +4 more sources

[1-(4-Hydroxyphenyl)-1H-tetrazol-5-ylsulfanyl]acetic acid

Acta Crystallographica Section E, 2008
The title compound, C9H8N4O3S, shows a layer structure constructed from intermolecular O—H...O and O—H...N hydrogen bonds. Interatomic distances suggest that extensive, but not uniform, π-electron delocalization is present in the ...
Yun-Long Feng, Shu-Guang Zhang, Cai-Hong Zhan   +2 more
doaj   +1 more source

Delocalization of exciton and electron wavefunction in non-fullerene acceptor molecules enables efficient organic solar cells

Nature Communications, 2020
Y6, as a non-fullerene acceptor for organic solar cells, has attracted intensive attention because of the low voltage loss and high charge generation efficiency. Here, Zhang et al.
Guichuan Zhang, Xian-Kai Chen, Jingyang Xiao, Philip C. Y. Chow, Minrun Ren, Grit Kupgan, Xuechen Jiao, Christopher C. S. Chan, Xiaoyan Du, Ruoxi Xia, Ziming Chen, Jun Yuan, Yunqiang Zhang, Shoufeng Zhang, Yidan Liu, Yingping Zou, He Yan, Kam Sing Wong, Veaceslav Coropceanu, Ning Li, Christoph J. Brabec, Jean-Luc Bredas, Hin-Lap Yip, Yong Cao   +23 more
doaj   +1 more source