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We study a bandwidth controlled Mott metal-insulator transition (MIT) between a Fermi liquid metal and a quantum spin-liquid insulator at half-filling in three dimensions (3D). Using a slave rotor approach, and incorporating gauge field…

Strongly Correlated Electrons · Physics 2013-05-29 Daniel Podolsky , Arun Paramekanti , Yong Baek Kim , T. Senthil

Interaction-driven metal-insulator transitions or Mott transitions are widely observed in condensed-matter systems. In multi-orbital systems, many-body physics is richer in which an orbital-selective metal-insulator transition is an…

Strongly Correlated Electrons · Physics 2018-11-09 Hanghui Chen

A major challenge in condensed matter physics is integrating topological phenomena with correlated electron physics to leverage both types of states for next-generation quantum devices. Metal-insulator transitions (MITs) are central to…

The fundamental building blocks of modern silicon-based microelectronics, such as double gate transistors in non-volatile Flash memories, are based on the control of electrical resistance by electrostatic charging. Flash memories could soon…

Materials Science · Physics 2013-04-23 Laurent Cario , Cristian Vaju , Benoit Corraze , Vincent Guiot , Etienne Janod

A correlated material in the vicinity of an insulator-metal transition (IMT) exhibits rich phenomenology and variety of interesting phases. A common avenue to induce IMTs in Mott insulators is doping, which inevitably leads to disorder.…

Metal-insulator transitions involve a mix of charge, spin, and structural degrees of freedom, and when strongly-correlated, can underlay the emergence of exotic quantum states. Mott insulators induced by the opening of a Coulomb gap are an…

Strongly Correlated Electrons · Physics 2021-05-14 Yejun Feng , Yishu Wang , D. M. Silevitch , S. E. Cooper , D. Mandrus , Patrick A. Lee , T. F. Rosenbaum

For a strongly correlated material, VO2, near a critical on-site Coulomb energy U/Uc=1, the abrupt Mott metal-insulator transition (MIT) rather than the continuous Hubbard MIT is observed by inducing internal optical phonon-coupled holes…

Strongly Correlated Electrons · Physics 2007-05-23 Hyun-Tak Kim , B. G. Chae , D. H. Youn , S. L. Maeng , K. Y. Kang

It was recently reported that a continuous electric current is a powerful control parameter to trigger changes in the electronic structure and metal-insulator transitions (MITs) in Ca2RuO4. However, the spatial evolution of the MIT and the…

Materials Science · Physics 2020-11-25 Giordano Mattoni , Shingo Yonezawa , Fumihiko Nakamura , Yoshiteru Maeno

In addition to its promising potential for applications, GaV4S8 shows very interesting physical properties with temperature and magnetic field. These properties can be tuned by applying hydrostatic pressure in order to reveal and understand…

Mott insulator to metal transitions under electric field are currently the subject of numerous fundamental and applied studies. This puzzling effect, which involves non-trivial out-of-equilibrium effects in correlated systems, is indeed at…

Strongly Correlated Electrons · Physics 2014-07-09 P. Stoliar , M. Rozenberg , E. Janod , B. Corraze , J. Tranchant , L. Cario

We report a first-order phase transition at T_M=357 K in single crystal Ca_2RuO_4, an isomorph to the superconductor Sr_2RuO_4. The discontinuous decrease in electrical resistivity signals the near destruction of the Mott insulating phase…

Strongly Correlated Electrons · Physics 2009-10-31 C. S. Alexander , G. Cao , V. Dobrosavljevic , E. Lochner , S. McCall , J. E. Crow , R. P. Guertin

Unusual metallic states involving breakdown of the standard Fermi-liquid picture of long-lived quasiparticles in well-defined band states emerge at low temperatures near correlation-driven Mott transitions. Prominent examples are…

Materials Science · Physics 2018-11-14 L. Craco , M. S. Laad , S. Leoni

Metal-insulator transition (MIT) is one of the most conspicuous phenomena in correlated electron systems. However such transition has rarely been induced by an external magnetic field as the field scale is normally too small compared with…

Strongly Correlated Electrons · Physics 2020-12-02 Guangqiang Wang , Guoqing Chang , Huibin Zhou , Wenlong Ma , Hsin Lin , M. Zahid Hasan , Su-Yang Xu , Shuang Jia

Metal insulator transitions driven by local Coulomb interactions are among the most fascinating phenomena in condensed matter physics. They occur in a large variety of transition metal compounds. Most of these strongly correlated materials…

Strongly Correlated Electrons · Physics 2007-05-23 A. Liebsch

Technology moves towards ever faster switching between different electronic and magnetic states of matter. Manipulating properties at terahertz rates requires accessing the intrinsic timescales of electrons (femtoseconds) and associated…

The transition voltage of an abrupt metal-insulator transition (MIT), observed by applying an electric field to two-terminal devices fabricated on a Mott insulator VO_2 film, decreases with increasing temperature up to 334K. The abrupt…

Strongly Correlated Electrons · Physics 2007-05-23 Hyun-Tak Kim , B. G. Chae , D. H. Youn , S. L. Maeng , K. Y. Kang

The use of intense tailored light fields is the perfect tool to achieve ultrafast control of electronic properties in quantum materials. Among them, Mott insulators are materials in which strong electron-electron interactions drive the…

Strongly Correlated Electrons · Physics 2023-02-07 Eduardo B. Molinero , Rui E. F. Silva

We present results of combined density functional theory plus dynamical mean-field theory (DFT+DMFT) calculations, which show that the Mott insulator LaTiO3 undergoes an insulator-to-metal transition under compressive epitaxial strain of…

Strongly Correlated Electrons · Physics 2014-04-17 Krzysztof Dymkowski , Claude Ederer

The spin-orbit Mott insulator Sr3Ir2O7 provides a fascinating playground to explore insulator-metal transition driven by intertwined charge, spin, and lattice degrees of freedom. Here, we report high pressure electric resistance and…

We show that the pressure-temperature phase diagram of the Mott insulator Ca$_{2}$RuO$_{4}$ features a metal-insulator transition at 0.5GPa: at 300K from paramagnetic insulator to paramagnetic quasi-two-dimensional metal; at $T \leq$ 12K…