Titel | Referent | Datum | Ort |
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Gemeinsames TKM-TFP Seminar | Garst, Mirlin, Rockstuhl, Schmalian, Shnirman |
Montag, 14.00-15.30 Uhr |
10-01 |
TFP Institutsseminar | Garst, Rockstuhl |
Dienstag, 13.00-14.00 Uhr |
10-01 |
IQMT Seminar | Campus Nord, Geb. 425 |
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Physikalisches Kolloquium | Freitag, 15.45-17.15 Uhr |
Lehmann HS |
Seminar über Theoretische Festkörperphysik |
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Vortragender: | Dr. Ipsita Mandal |
Datum: | 05.12.2016 14:00 |
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Ort: | Raum 10.01, Geb. 30.23 (Physikhochhaus), Campus Süd |
Zugehörigkeit: | Uni Basel |
Gastgeber: | Prof. A. Shnirman |
Abstract
We devise a renormalization group analysis for quantum field theories with Fermi surface to study scaling behaviour of non-Fermi liquid states in a controlled approximation. The non-Fermi liquid fixed points are identified from a Fermi surface in (m+1) spatial dimensions, while the co-dimension of Fermi surface is also extended to a generic value. We also study superconducting instability in such systems as a function of dimension and co-dimension of the Fermi surface. The key point in this whole analysis is that unlike in relativistic QFT, the Fermi momentum $k_F$ enters as a dimensionful parameter, thus modifying the naive scaling arguments. The effective coupling constants are found to be combinations of the original coupling constants and $k_F$.