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The possibility of ferromagnetic ordering is revisited in the band model. The coherent potential approximation decoupling has been used for the strong on-site Coulomb interaction. The driving forces towards the ferromagnetism are the…

强关联电子 · 物理学 2016-08-16 G. Górski , J. Mizia

The bare Coulomb interaction between two like-charges is repulsive. When these charges are immersed in an electrolyte, the thermal fluctuations of the ions turn the bare Coulomb interaction into an effective interaction between the two…

统计力学 · 物理学 2023-03-15 Gabriel Tellez

We perform a detailed study of the phase transitions and mechanisms of electron localization in the extended Hubbard model using the dynamical cluster approximation on a $2\times 2$ cluster. We explore the interplay of charge order and Mott…

强关联电子 · 物理学 2021-08-25 Hanna Terletska , Sergei Iskakov , Thomas Maier , Emanuel Gull

We found analytical solution for the time evolution of localized electron density in a system of two coupled single-level quantum dots (QDs) connected with continuous spectrum states in the presence of Coulomb interaction. This solution…

介观与纳米尺度物理 · 物理学 2013-12-30 P. I. Arseev , N. S. Maslova , V. N. Mantsevich

Large electron-electron Coulomb-interactions in correlated systems can lead to a periodic arrangement of localized electrons, the so called "charge-order". The latter is here proposed as a driving force behind ferroelectricity in iron…

材料科学 · 物理学 2015-05-14 Kunihiko Yamauchi , Silvia Picozzi

The mutual influence of two layers with strongly loclized electrons is exercised through the random Coulomb shifts of site energies in one layer caused by electron hops in the other layer. We trace how these shifts give rise to a voltage…

介观与纳米尺度物理 · 物理学 2009-11-07 M. E. Raikh , Felix von Oppen

A natural explanation for the carrier concentration-dependent electronic behavior in the layered cobaltates emerges within correlated-electron Hamiltonians with finite on-site and significant nearest neighbor hole-hole Coulomb repulsions.…

强关联电子 · 物理学 2015-05-20 H. Li , R. T. Clay , S. Mazumdar

We thoroughly examine the ground state of the triangular lattice of Pb on Si(111) using scanning tunneling microscopy. We detect charge-order, accompanied by a subtle structural reconstruction. Applying the extended variational cluster…

Charge order is a commonly observed phenomenon in strongly correlated materials. However, most theories are based on a repulsive inter-site Coulomb interaction in order to explain charge order. We here show that only due to local…

强关联电子 · 物理学 2013-04-29 Robert Peters , Shintaro Hoshino , Norio Kawakami , Junya Otsuki , Yoshio Kuramoto

We study the critical points of Coulomb energy considered as a function on configuration spaces associated with certain geometric constraints. Two settings of such kind are discussed in some detail. The first setting arises by considering…

度量几何 · 数学 2016-04-06 G. Khimshiashvili , G. Panina , D. Siersma

A self-consistent-field theory is given for the electronic collective modes of a chain containing a finite number, $N$, of Coulomb-coupled spherical two-dimensional electron gases (S2DE's) arranged with their centers along a straight line,…

介观与纳米尺度物理 · 物理学 2015-06-23 Liubov Zhemchuzhna , Godfrey Gumbs , Andrii Iurov , Danhong Huang , Bo Gao

It was shown that tunneling current flowing through a system with Coulomb correlations leads to charge redistribution between the different localized states. Simple model consisting of two electron levels have been analyzed by means of…

其他凝聚态物理 · 物理学 2012-07-02 P. I. Arseyev , N. S. Maslova , V. N. Mantsevich

Various charge pairings in strongly correlated electron systems are interpreted as quantum entanglement of a composite system. Particles in the intermediate phase have a tendency to form the coherent superposition state of the localized…

强关联电子 · 物理学 2012-04-17 Byung Gyu Chae

The author suggests an approach based on the separation of total energy of multielectron systems into the semi-classical Coulomb part and the non-classical additional part. This approach allows on the one hand to simplify calculations and…

原子物理 · 物理学 2008-11-04 Vadim Kavera

We present theoretical investigation of spatial charge distribution in the two-level system with strong Coulomb correlations by means of Heisenberg equations analysis for localized states total electron filling numbers taking into account…

介观与纳米尺度物理 · 物理学 2015-05-28 P. I. Arseyev , N. S. Maslova , V. N. Mantsevich

The processes of Coulomb gas ordering in 3D layered system are studied by means of Brownian dynamics approach. It is found that at different densities of the carriers the 3D lattice of charges as well as new specific structures are possible…

强关联电子 · 物理学 2007-05-23 Yu. G. Pashkevich , A. E. Filippov

We analyzed the localized charge dynamics in the system of $N$ interacting single-level quantum dots (QDs) coupled to the continuous spectrum states in the presence of Coulomb interaction between electrons within the dots. Different dots…

介观与纳米尺度物理 · 物理学 2013-07-09 Vladimir Mantsevich , Natalya Maslova , Petr Arseyev

We study the occupation of two electrostatically-coupled single-level quantum dots with spinless electrons as a function of gate voltage. While the total occupation of the double-dot system varies monotonically with gate voltage, we predict…

介观与纳米尺度物理 · 物理学 2009-11-10 Jürgen König , Yuval Gefen

The Coulomb drag effect arises due to electron-electron interactions, when two metallic conductors are placed in close vicinity to each other. It manifests itself as a charge current or voltage drop induced in one of the conductors, if the…

介观与纳米尺度物理 · 物理学 2019-05-14 Artem Borin , Ines Safi , Eugene Sukhorukov

In organic photovoltaics, charges can separate efficiently even if their Coulomb attraction is an order of magnitude greater than the available thermal energy. Delocalization has been suggested to explain this fact, because it could…

化学物理 · 物理学 2022-08-16 Daniel Balzer , Ivan Kassal
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