Janani C, Merino J, McCulloch I P, Powell B J
Centre for Organic Photonics and Electronics, School of Mathematics and Physics, The University of Queensland, Brisbane, Queensland 4072, Australia and Centre for Engineered Quantum Systems, School of Mathematics and Physics, The University of Queensland, Brisbane, Queensland 4072, Australia.
Departamento de Física Teórica de la Materia Condensada, Condensed Matter Physics Center (IFIMAC) and Instituto Nicolás Cabrera, Universidad Autónoma de Madrid, Madrid 28049, Spain.
Phys Rev Lett. 2014 Dec 31;113(26):267204. doi: 10.1103/PhysRevLett.113.267204.
We report the discovery of a correlated insulator with a bulk gap at 2/3 filling in a geometrically frustrated Hubbard model that describes the low-energy physics of Mo3S7(dmit)3. This is very different from the Mott insulator expected at half-filling. We show that the insulating phase, which persists even for very weak electron-electron interactions (U), is adiabatically connected to the Haldane phase and is consistent with experiments on Mo3S7(dmit)3.
我们报告了在一个描述Mo3S7(dmit)3低能物理的几何阻挫哈伯德模型中，在2/3填充时发现具有体能隙的关联绝缘体。这与半填充时预期的莫特绝缘体非常不同。我们表明，即使对于非常弱的电子-电子相互作用（U）仍存在的绝缘相，与霍尔丹相是绝热相连的，并且与对Mo3S7(dmit)3的实验结果一致。
