Mott transition in the Hubbard model away from particle-hole symmetry

نویسندگان

  • D. J. García
  • E. Miranda
  • K. Hallberg
  • M. J. Rozenberg
چکیده

D. J. García,1 E. Miranda,1 K. Hallberg,2 and M. J. Rozenberg3,4 1Instituto de Física Gleb Wataghin, Unicamp, CEP 13083-970 Campinas, SP, Brazil 2Instituto Balseiro and Centro Atómico Bariloche, CNEA, (8400) San Carlos de Bariloche, Argentina 3Laboratoire de Physique des Solides, CNRS-UMR8502, Université de Paris-Sud, Orsay 91405, France 4Departamento de Física, FCEN, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón 1, Buenos Aires (1428), Argentina Received 27 December 2006; revised manuscript received 27 February 2007; published 26 March 2007

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Mott insulators and the doping-induced Mott transition within DMFT: exact results for the one-band Hubbard model.

The paramagnetic phase of the one-band Hubbard model is studied at zero-temperature, within the framework of dynamical mean-field theory, and for general particle-hole asymmetry where a doping-induced Mott transition occurs. Our primary focus is the Mott insulator (MI) phase, and our main aim to establish what can be shown exactly about it. To handle the locally doubly-degenerate MI requires tw...

متن کامل

Phasediagramfor the excitonMott transition in infinite-dimensional electron-hole systems

To understand the essence of the exciton Mott transition in three-dimensional electron-hole systems, the metalinsulator transition is studied for a two-band Hubbard model in infinite dimensions with interactions of electronelectron (hole-hole) repulsion U and electron-hole attraction −U . By using the dynamical mean-field theory, the phase diagram in the U -U ′ plane is obtained (which is exact...

متن کامل

Effect of particle-hole asymmetry on the Mott-Hubbard metal-insulator transition.

The Mott-Hubbard metal-insulator transition is one of the most important problems in correlated-electron systems. In the past decade, much progress has been made in examining a particle-hole symmetric form of the transition in the Hubbard model with dynamical mean field theory, where it was found that the electronic self-energy develops a pole at the transition. We examine the particle-hole asy...

متن کامل

Phase separation in the particle-hole asymmetric Hubbard model

The paramagnetic phase diagram of the Hubbard model with nearest-neighbor and next-nearest-neighbor NNN hopping on the Bethe lattice is computed at half-filling and in the weakly doped regime using the self-energy functional approach for dynamical mean-field theory. NNN hopping breaks the particle-hole symmetry and leads to a strong asymmetry of the electron-doped and hole-doped regimes. Phase ...

متن کامل

Particle-hole symmetry and the effect of disorder on the Mott-Hubbard insulator.

The understanding of the interplay of electron correlations and randomness in solids is enhanced by demonstrating that particle-hole ( p-h) symmetry plays a crucial role in determining the effects of disorder on the transport and thermodynamic properties of the half-filled Hubbard Hamiltonian. We show that the low-temperature conductivity decreases with increasing disorder when p-h symmetry is ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2007