ISSP - The institute for Solid State Physics

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[ISSP Colloquiums]
Spin liquids and exotic phases of Mott insulators
Title : Spin liquids and exotic phases of Mott insulators
Date :
Time :
2009/7/2(Thu)
4:00 PM - 5:00 PM 
Place : Lecture Room (A632), 6th Floor, ISSP   
Lecturer : Prof. Frederic Mila
Affiliation : EPFL, Lausanne, Switzerland /ISSP
Summary : The proposal that doping a spin liquid might lead to superconductivity has been one of the main motivations to explore exotic phases of Mott insulators.
In this talk, I will discuss some of the recent successes in the identification of such phases, with emphasis on the properties of two systems in strong magnetic field.
First, I will review the properties of SrCu2(BO3)2, a system that exhibits a remarkable series of magnetization plateaux on the way to polarization, and I will discuss the current status of the identification of these phases as high-commensurability Mott-insulating phases of effective hard-core bosons.
Then I will turn to BaCuSi2O6, a compound also known as Han purple, and I will show that frustration leads to a dimensional reduction where every second layer constitutes a highly unconventional 2D gas of hard-core bosons.
Contact : Masaki Oshikawa,Masashi Tokunaga