When superconductor turns superinsulator

Seminar
Speaker
Prof. Tatyana I. Baturina
Date
16/03/2015 - 12:30Add to Calendar 2015-03-16 12:30:00 2015-03-16 12:30:00 When superconductor turns superinsulator For nearly a half century the dominant orthodoxy has been that the only effect of Cooper pairing is a state with zero resistivity at finite temperatures, superconductivity.  In this talk I will show that Cooper pairing can generate a dual state with zero conductivity in a finite temperature range, superinsulation.  Superconductor-superinsulator duality rests on the symmetry of the Heisenberg uncertainty principle relating the amplitude and phase of the superconducting order parameter. It is realized in the critical region of the quantum superconductor-insulator transition (SIT) in two-dimensional systems via the duality between the vortex and charge of the Berezinskii–Kosterlitz–Thouless transition. I will discuss the origin of the long-range logarithmic two-dimensional Coulomb forces between the charges ensuring the vortex-charge duality in the critical vicinity of the SIT. Prof. Baturina is from A. V. Rzhanov Institute of Semiconductor Physics SB RAS, 13 Lavrentjev Avenue, Novosibirsk, 630090 Russia   Place: Nano Building (206) room C50 floor 0 המחלקה לפיזיקה physics.dept@mail.biu.ac.il Asia/Jerusalem public
Place
Place: Nano Building (206) room C50 floor 0
Abstract

For nearly a half century the dominant orthodoxy has been that the only effect of Cooper pairing is a state with zero resistivity at finite temperatures, superconductivity.  In this talk I will show that Cooper pairing can generate a dual state with zero conductivity in a finite temperature range, superinsulation.  Superconductor-superinsulator duality rests on the symmetry of the Heisenberg uncertainty principle relating the amplitude and phase of the superconducting order parameter. It is realized in the critical region of the quantum superconductor-insulator transition (SIT) in two-dimensional systems via the duality between the vortex and charge of the Berezinskii–Kosterlitz–Thouless transition. I will discuss the origin of the long-range logarithmic two-dimensional Coulomb forces between the charges ensuring the vortex-charge duality in the critical vicinity of the SIT.

Prof. Baturina is from A. V. Rzhanov Institute of Semiconductor Physics SB RAS, 13 Lavrentjev Avenue, Novosibirsk, 630090 Russia

 

תאריך עדכון אחרון : 12/03/2015