Nonmagnetic Insulating States near the Mott Transitions on Lattices with Geometrical Frustration and Implications for κ-(ET)2Cu2(CN)3

By Hidekazu Morita, S. Watanabe, M. Imada. 2002

176 citations recorded by the source corpus.

We study phase diagrams of the Hubbard model on anisotropic triangular lattices, which also represents a model for κ-type BEDT-TTF compounds. In contrast with mean-field predictions, path-integral renormalization group calculations show a universal presence of a nonmagnetic insulator sandwiched by an antiferromagnetic insulator and paramagnetic metals. The nonmagnetic phase does not show simple translational symmetry breakings such as flux phases, implying a genuine Mott insulator. We discuss possible relevance to the nonmagnetic insulating phase found in κ-(ET) 2 Cu 2 (CN) 3 .

Subfields: Condensed Matter Physics, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/67e787a86d7218e330e2a8aff3dae51804784fbf

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Condensed Matter Physics

1. Yi Zhou
2. T. Ng
3. K. Kanoda
4. B. Powell
5. R. McKenzie
6. W. Metzner
7. Carsten Honerkamp
8. K. Schoenhammer

In Electronic, Optical and Magnetic Materials

1. Yi Zhou
2. T. Ng
3. K. Kanoda
4. R. McKenzie
5. B. Powell
6. Manfred Salmhofer

Citations in the corpus

• Functional renormalization group approach to correlated fermion systems (2011, background): “At large U , the spin exchange interaction between the sites of the triangular lattice is geometrically frustrated, leading to a much weaker appearance of antiferromagnetism and a possible non-magnetic insulating phase (Morita et al., 2002; Sahebsara and Sénéchal, 2008; Yoshioka et al., 2009).”
• Quantum frustration in organic Mott insulators: from spin liquids to unconventional superconductors (2010, background): “…Liebsch et al., 2009; Ohashi et al., 2008; Parcollet et al., 2004), slave rotor representation (Lee and Lee, 2005; Lee et al., 2007b), path-integral renormalisation group (Morita et al., 2002), cluster variational approach (Sahebsara and Sénéchal, 2008), and dual fermions (Lee et al., 2008).”
• Quantum spin liquid states (2016, background): “…triangular-lattice Hubbard model, the ground states near to the Mott transition are controversial (Kyung and Tremblay, 2006; Laubach et al., 2015; Morita et al., 2002; Tocchio et al., 2013; Watanabe et al., 2008), implying that spin-liquid and magnetic phases are competing very closely and can…”
• Thermal-transport measurements in a quantum spin-liquid state of the frustrated triangular magnet -(BEDT-TTF) 2 Cu 2 (CN) 3 (2009, unknown): “Several ideas, such as a Hubbard model with a moderate onsite repulsio”