Condensed Matter Physics Seminar

Thursday, April 20, 1999, 2 p.m.
Plant Sciences Building, Room 1130

Electrons on edge

Victor Yakovenko

(Department of Physics, University of Maryland)

Abstract: First, a simple theory of an electron state localized at the end of a one-dimensional system inside an energy gap is presented. Then, the results are applied to describe the following cases:

Chiral edge states in the quantum Hall regime of the quasi-one-dimensional organic conductors (TMTSF)₂X
Midgap Andreev bound states in the triplet superconducting state of (TMTSF)₂X
Chiral edge states and spin quantum Hall effect in the triplet superconductor Sr₂RuO₄

Various experiments are proposed to detect the edge electron states. Relations to

Solitons in polyacetylene
Midgap Andreev bound states in d-wave cuprate superconductors
Edge states in graphite and carbon nanotubes

are briefly discussed.

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