The Bechgaard salts and the high T$_c$ cuprates are described by two and three band models, respectively, with the lowest band (nearly) half filled. In organics the interactions are small, while in cuprates the repulsion $U_d$ on the Cu site is the largest energy. The Mott AF state is stable in undoped materials in both cases. In the metallic phase of cuprates the $U_d\to\infty$ limit produces a moderate effective repulsion. The theories of the coherent SDW and charge-transfer correlations in the metallic phases of organics and cuprates are thus similar. In (undoped) organics those correlations are associated with commensurate $2k_F$ SDW and $4k_F$ bond or site modes. The corresponding modes in metallic cuprates are the incommensurate SDW and in particular O$_x$/O$_y$ quadrupolar charge transfer with wave vector $2q_{SDW}=q_0+G$. They are enhanced for dopings $x>0$, which bring the Fermi level close to the van Hove singularity. Strong coupling to the lattice associates the static incommensurate O$_x$/O$_y$ charge transfer with collinear "nematic" stripes. In contrast to organics, the coherent correlations in cuprates compete with local $d_{10}\leftrightarrow d_9$ quantum charge-transfer disorder.
Quantum oscillations from `open' Fermi surface in quasi-one-dimensional lattices: Application to YBa2Cu3O6 cuprates, organic salts, ladder compounds, and related systems
根据著名的Onsagar-Lifshitz范式，Shubnikov de-Haas和de-Haas van Alphen（SdHvA）振荡的观察表明，在体中存在“闭合”轨道费米面。我们提出了一个基于实空间的计算SdHvA振荡在广义准一维晶格放松的准经典近似嵌入在这个几十年的老Onsagar-Lifshitz范式。我们发现，相当大的量子振荡可以产生从'开放'费米表面，只要回旋轨道可以形成在现实空间中有限的，但不一定相等，电子跳跃沿x和y方向。我们的结果定量地解释了各种准一维材料中令人困惑的SdHvA振荡的出现，包括YBa_2Cu_3O_6铜酸盐的链态，有机材料，各种梯形化合物，弱耦合线性链，或量子线，和其他相关系统。
Tuning the critical temperature of cuprate superconductor films using self-assembled organic layers
高温铜酸盐超导体（HTSC）的许多电子性质强烈地依赖于置于CuO $_2$平面（掺杂）中的电荷载流子的数量。超导性出现在掺杂温度相图的圆顶形区域。最高的临界温度（Tc）是针对所谓的“最佳掺杂”而获得的。掺杂机制通常是化学的;它可以通过阳离子取代来完成。例如，在La $_{2-x}$ Sr $_x$ CuO $_4$中就是这种情况，其中La 3+被Sr 2+取代，从而向CuO $_2$平面添加空穴。通过添加氧，如在YBa $_2$ Cu $_3$ O $_{6+δ}$的情况下，获得类似的效果，其中$δ$表示样品中的过量氧。在本文中，我们报告了一种不同的机制，一个能够添加或删除载体从表面的高温超导体。该方法利用吸附在铜酸盐表面上的极性分子的自组装单层（SAM）。在光学活性分子的情况下，SAM的极性可以通过在涂覆的表面上照射光来调制。这导致样品的超导相变的光诱导调制。使用SAM控制超导转变温度的能力使得这些表面对于基于高Tc超导体的各种设备（例如开关和检测器）是实用的。
Momentum space anisotropy and pseudogaps: a comparative cluster dynamical mean field analysis of the doping-driven metal-insulator transition in the two dimensional Hubbard model
Failed superconductivity in a Mott spin liquid material
National High Magnetic Field Laboratory, Florida State University（佛罗里达州立大学国家高磁场实验室）；Department of Physics, Florida State University（佛罗里达州立大学物理系）；Physikalisches Institut, Universität Stuttgart（斯图加特大学第一物理研究所）；Department of Physics, Hokkaido University（北海道大学物理系）；Institute of Solid State Physics, Vienna University of Technology（维也纳工业大学固体物理研究所）
