Cornell University

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LASSP & AEP Seminar - Mathias Scheurer - Faculty Search Candidate

Tuesday, February 5, 2019 at 12:20pm to 1:15pm

700 Clark Hall

Mathias Scheurer, Harvard

Faculty Search Candidate 

 

Topology in correlated condensed matter systems

 

 

The classification of different phases of matter is a crucial cornerstone of condensed matter physics. In the traditional theory of phase transitions, pioneered by Landau, different phases are characterized by the symmetries they break. Many phase transitions fit into this paradigm, such as the ferromagnet-paramagnet transition. However, more recent developments have shown that many body systems can exhibit phase transitions between two states that share the same symmetries, but can be sharply distinguished by their “topological” properties. Nowadays, topology has become an integral part of many research directions of condensed matter physics. This talk will begin with an elementary introduction to the key concepts of topology and their relevance to many body physics. We will then discuss specific applications to correlated condensed matter systems: for instance, we will consider the interaction-induced formation of topological superconductivity in spin-orbit-coupled systems and uncover a relation between the mechanism driving the superconducting instability and the topology of the resulting state. Furthermore, we will see that many properties of one of the most mysterious phases of the cuprate high-temperature superconductors, the pseudogap phase, are naturally understood in terms of a gauge theory that exhibits topological order. We will also discuss how this theory allows to intertwine topological order with the discrete broken symmetries found in the cuprate superconductors.

Poster

Light refreshments will be served before the seminar.

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Event Type

Seminar

Departments

LASSP, Applied and Engineering Physics

Tags

lassp_and_aep_seminar

Contact E-Mail

lmr268@cornell.edu

Contact Name

Lea Reagan

Contact Phone

607-255-9684

Speaker

Mathias Scheurer

Speaker Affiliation

Harvard University

Open To

Public

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