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23 April 2024 |
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Spin Degeneracy and Conductance Fluctuations in Open Quantum Dots | | J. A. Folk
; S. R. Patel
; K. M. Birnbaum
; C. M. Marcus
; C. I. Duruoz
; J. S. Harris Jr
; | | Date: |
3 May 2000 | | Journal: | Phys. Rev. Lett. 86, 2102 (2001) | | Subject: | Mesoscopic Systems and Quantum Hall Effect; Materials Science | cond-mat.mes-hall cond-mat.mtrl-sci | | Abstract: | The dependence of mesoscopic conductance fluctuations on parallel magnetic field is used as a probe of spin degeneracy in open GaAs quantum dots. The variance of fluctuations at high parallel field is reduced from the low-field variance (with broken time-reversal symmetry) by factors ranging from roughly two in a 1 square-micron dot at low temperature, to four or greater in 8 square-micron dots. The factor of two is expected for simple Zeeman splitting of spin degenerate channels. A possible explanation for the unexpected larger factors in terms of field-dependent spin orbit scattering is proposed. | | Source: | arXiv, cond-mat/0005066 | | Services: | Forum | Review | PDF | Favorites | |
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