Publication

Exponential localization of Wannier functions in insulators

Related publications (32)

Graph Chatbot

Chat with Graph Search

Ask any question about EPFL courses, lectures, exercises, research, news, etc. or try the example questions below.

DISCLAIMER: The Graph Chatbot is not programmed to provide explicit or categorical answers to your questions. Rather, it transforms your questions into API requests that are distributed across the various IT services officially administered by EPFL. Its purpose is solely to collect and recommend relevant references to content that you can explore to help you answer your questions.

Wannier functions and exchange integrals: The example ofLiCu2O2

Frédéric Mila

Starting from a single band Hubbard model in the Wannier function basis, we revisit the problem of the ligand contribution to exchange and derive explicit formulas for the exchange integrals in metal oxide compounds in terms of atomic parameters that can b ...

2007

Integrated Hall Microsystem with Current Re-Use

Radivoje Popovic, Pavel Kejik, Predrag Drljaca

A new architecture of a Hall microsystem for low-power applications is presented. The innovation in this paper lies in the re-use of the electric current for biasing of several parts in the microsystem permitting substantial reduction of the current consum ...

American Scientific Publishers2007

Automatic calibration of Hall sensor microsystems

Maher Kayal, Marc Pastre

In many applications, a Hall element is used for contact-less measurement such as linear and angular positions, electrical current, power and energy, etc. The Hall element fabricated by means of CMOS technology features mediocre characteristics [R.S. Popov ...

2006

Hall sensor and method of operating a Hall sensor

Giovanni Boero, Radivoje Popovic, Pavel Kejik, Predrag Drljaca

A Hall sensor comprises a Hall element (1; 30; 31; 60) and an amplifier (2; 32; 33). The Hall element is placed inside the amplifier so that the current flowing through the Hall element also flows through the transistors of an amplifier stage of the amplif ...

2006

Study of novel electronic conductors

Neven Barisic

This thesis presents the results of a concerted effort to understand the complex array of physical properties exhibited by the BaVS3 family of materials. As a 3d1 system, BaVS3 displays a unique collection of correlation-driven phenomena, including a metal ...

EPFL2005

Enhanced magnetoresistance of semiconductor-metal hybrid structures

Dirk Grundler

Semiconductor-metal hybrid structures can show a large magnetoresistance effect, the extraordinary magnetoresistance (EMR) effect. In this work, we study theoretically the influence of the voltage probe configuration on the magnetoresistance of such hybrid ...

AIP Publishing2005

Enhanced sensitivity due to current redistribution in the Hall effect of semiconductor-metal hybrid structures

Dirk Grundler

Experimental and theoretical studies have shown that nonmagnetic semiconductor-metal hybrid structures can exhibit a very large magnetoresistanceeffect, the so-called extraordinary magnetoresistance (EMR) effect. The EMR can be useful in magnetic-field sen ...

American Institute of Physics2005

Maximally localized Wannier functions for entangled energy bands

Nicola Marzari

We present a method for obtaining well-localized Wannier-like functions (WF's) for energy bands that are attached to or mixed with other bands. The present scheme removes the limitation of the usual maximally localized WF's method [N. Marzari and D. Vander ...

2002

Wannier-function description of the electronic polarization and infrared absorption of high-pressure hydrogen

Nicola Marzari

We have constructed maximally localized Wannier functions for prototype structures of solid molecular hydrogen under pressure, starting from local-density approximation and tight-binding Bloch wave functions. Each occupied Wannier function can be associate ...

2000

Maximally-localized Wannier functions in perovskites: Cubic BaTiO3

Nicola Marzari

The electronic ground state of a periodic crystalline solid is usually described in terms of extended Bloch orbitals; localized Wannier functions can alternatively be used. These two representations are connected by families of unitary transformations, car ...

Amer Inst Physics1998