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Phase diagram of the spin quantum Hall transition
We study a system which can be realized in a dirty, gapless superconductor in which time-reversal symmetry for orbital motion is broken, but spin-rotation symmetry is intact. We present a phase diagram in a phase-space of spin Hall conductance є and energy of quasiparticles ∆. It exhibits a direct...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2018
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| Series: | Физика низких температур |
| Subjects: | |
| Online Access: | http://dspace.nbuv.gov.ua/handle/123456789/176500 |
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| Summary: | We study a system which can be realized in a dirty, gapless superconductor in which time-reversal symmetry
for orbital motion is broken, but spin-rotation symmetry is intact. We present a phase diagram in a phase-space
of spin Hall conductance є and energy of quasiparticles ∆. It exhibits a direct transition between two insulating
phases with quantized Hall conductances of zero and two for the conserved quasiparticles when ∆ = 0. The energy of the quasiparticles acts as a relevant symmetry-breaking field at the critical point, which splits the direct
transition into two conventional plateau transitions. We use updated correct values of the critical exponents to
define these two critical lines as є ~ ±∆⁶/⁷. |
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