Projekt

Schwinger bosons for magnetism

Udbyder

Vejleder

Sted

København og omegn

Magnetic order arises from interactions between electronic spins. This introduces correlation in the quantum mechanical wavefunction, which renders a theoretical description highly challenging. One tyically resorts to the Heisenberg model, which captures the essential physics, but even that model cannot be solved without certain approximations.

Very recently, it was demonstrated that the two-dimensional material CrI3 exhibits magnetic order below 45 K. This is the first example ever of a magnetic 2D material and the microscopic mechanism that is responsible for magnetic order is linked to the magnetic anisotropy in the material.

In the present project we will study the 2D Heisenberg model with anisotropy relevant for CrI3. We combine quantum mechanical calculations with statistical physics to obtain a theoretical estimate of the critical temperature. In particular, we will use the method of Schwinger bosons that maps the spin operators on to a set of bosonic operators that create and anihilate spin exciations. The resulting equations can be handled in a mean field framework if a holonomic constraint on the operators is included.

Forudsætninger

Electronic structure methods in solid state physics

Søg i opslag
Kontakt

Virksomhed/organisation

DTU Fysik

Navn

Thomas Olsen

Stilling

Lektor

Mail

tolsen@fysik.dtu.dk

Vejleder-info

Bachelor i Fysik og Nanoteknologi

Vejleder

Thomas Olsen

ECTS-point

15 - 20

Type

Bachelorprojekt

Kandidatuddannelsen i Fysik og Nanoteknologi

Vejleder

Thomas Olsen

ECTS-point

15 - 20

Type

Bachelorprojekt

OM DTU

DTU er et teknisk eliteuniversitet med international rækkevidde og standard. Vores mission er at udvikle og nyttiggøre naturvidenskab og teknisk videnskab til gavn for samfundet. 10.000 studerende uddanner sig her til fremtiden, og 5.700 medarbejdere har hver dag fokus på uddannelse, forskning, myndighedsrådgivning og innovation, som bidrager til øget vækst og velfærd.

Find os her

Anker Engelunds Vej 1
Bygning 101A
2800 Kgs. Lyngby


45 25 25 25

dtu@dtu.dk

CVR-nr. 30 06 09 46

Liste over EAN Numre

Job på DTU

Se alle jobs
 

loading..