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Atomic many-body phase transitions and quantum criticality have recently attracted much attention in non-standard optical lattices. Here we perform an experimental study of finite-temperature superfluid transition of bosonic atoms confined…

量子气体 · 物理学 2019-07-09 Shengjie Jin , Xinxin Guo , Peng Peng , Xuzong Chen , Xiaopeng Li , Xiaoji Zhou

Using the generalized DMFT+Sigma approach we have studied disorder influence on single-particle properties of the normal phase and superconducting transition temperature in attractive Hubbard model. The wide range of attractive potentials U…

超导电性 · 物理学 2018-10-12 E. Z. Kuchinskii , N. A. Kuleeva , M. V. Sadovskii

The empirical relation of T_co(K)=2740/<q>_c^4 between the transition temperature of optimum doped superconductors T_co and the mean cationic charge <q>_c, a physical paradox, can be recast to strongly support fractal theories of high-T_c…

综合物理 · 物理学 2016-04-07 Hans Hermann Otto

A model for high-temperature superconductors incorporating antiferromagnetism, d-wave superconductivity, and no double lattice-site occupancy can give energy surfaces exquisitely balanced between antiferromagnetic and superconducting order…

强关联电子 · 物理学 2008-11-03 Mike Guidry , Yang Sun , Cheng-Li Wu

The mechanism of high temperature superconductivity is not resolved for so long because the normal state of cuprates is not yet understood. Here we show that the normal state pseudo-gap exhibits an unexpected non-monotonic temperature…

An unconventional superconducting phase is explored developing out of a non Fermi-liquid phase of the two-channel Anderson lattice model. It is characterized by a composite order parameter comprising of a local spin or orbital degree of…

强关联电子 · 物理学 2009-11-07 Frithjof B. Anders

High-Tc superconducting materials (HTSC) have anomalous properties such as the pseudo-gap or spin-gap etc., in Hall coefficient, 1/T1T and the density of states etc. First including effects of strong on-site repulsion between d-electrons at…

超导电性 · 物理学 2009-11-07 Akito Kobayashi , Atsushi Tsuruta , Tamifusa Matsuura , Yoshihiro Kuroda

Irrespective of the class they belong to, all the hole doped high-Tc cuprate superconductors show an anti-correlation between the superconducting transition temperature and the characteristic pseudogap energy in the underdoped region. The…

超导电性 · 物理学 2018-09-18 S. H. Naqib , R. S. Islam , Ihtisham Qabid

The diversity of vortex melting and solid-solid transition lines measured in different high-T$_{c}$ superconductors is explained, postulating a unified order-disorder phase transition driven by both thermally- and disorder-induced…

超导电性 · 物理学 2016-08-31 Y. Radzyner , A. Shaulov , Y. Yeshurun

There recently accumulated growing numerical and experimental evidence that a novel glassy zero-field phase characterized by the spontaneously broken time-reversal symmetry, a chiral-glass phase, is realized in certain ceramic high-$T_c$…

凝聚态物理 · 物理学 2007-05-23 Hikaru Kawamura

We study the interplay of nematic and superconducting order in the two-dimensional Hubbard model and show that they can coexist, especially when superconductivity is not the energetically dominant phase. Due to a breaking of the $C_4$…

强关联电子 · 物理学 2016-09-07 Jan Kaczmarczyk , Tobias Schickling , Jörg Bünemann

Recent experimental and theoretical developments in high-temperature superconductivity are reviewed, and the empirically asymmetric behavior between hole-doped and electron-doped cuprates is contrasted. A number of phenomena previously…

超导电性 · 物理学 2007-05-23 N. -C. Yeh

A microscopic analysis of the superconducting quantum critical point realized via a pair-breaking quantum phase transition is presented. Finite temperature crossovers are derived for the electrical conductivity, which is a key probe of…

超导电性 · 物理学 2007-09-19 N. Shah , A. V. Lopatin

This article investigates the pseudo transitions of the Blume-Capel model on two-dimensional finite-size lattices. By employing the Wang-Landau sampling method and microcanonical inflection point analysis, we identified the positions of…

统计力学 · 物理学 2025-02-10 Lei Shi , Wei Liu , Xiang Li , Xin Zhang , Fangfang Wang , Kai Qi , Zengru Di

Charge density waves are a common occurrence in all families of high critical temperature superconducting cuprates. Although consistently observed in the underdoped region of the phase diagram and at relatively low temperatures, it is still…

We consider the interlayer pair-tunneling model for layered cuprates, including an effective single particle hopping along the c-axis. A phenomenological suppression of the c-axis hopping matrix element, by the pseudogap in cuprate…

超导电性 · 物理学 2009-10-31 Biplab Chattopadhyay , A. N. Das

We study the effect of thermal fluctuations on the critical dynamics of the three-dimensional disordered superconductor across the normal-superconducting transition. We employ a phenomenological hydrodynamic approach, and in particular find…

超导电性 · 物理学 2009-10-31 Smitha Vishveshwara , Matthew P. A. Fisher

We present numerical evidence using Monte Carlo simulations of finite-temperature phase transition in two dimensional Coulomb Glass lattice model with random site energies at half-filling. For the disorder strengths ($W$) studied in this…

无序系统与神经网络 · 物理学 2019-07-31 Preeti Bhandari , Vikas Malik

Cuprates, ferropnictides and ferrochalcogenides are three classes of unconventional high-temperature superconductors, who share similar phase diagrams in which superconductivity develops after a magnetic order is suppressed, suggesting a…

超导电性 · 物理学 2012-04-30 Jiangping Hu , Hong Ding

The two-dimensional XY gauge glass, which describes disordered superconducting grains in strong magnetic fields, is investigated, with regard to the possibility of a glass transition. We compute the glass susceptibility and the correlation…

凝聚态物理 · 物理学 2009-10-31 M. Y. Choi , Sung Yong Park