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Volumn 71, Issue 11, 2005, Pages

Effects of electron interactions at crossings of Zeeman-split subbands in quantum wires

Author keywords

[No Author keywords available]

Indexed keywords

ACCELERATION; ARTICLE; CALCULATION; CONDUCTANCE; CORRELATION ANALYSIS; DENSITY; ELECTRON; ELECTRONICS; MAGNETIC FIELD; MATHEMATICAL COMPUTING; POLARIZATION;

EID: 20044375268     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.71.115303     Document Type: Article
Times cited : (25)

References (33)
  • 17
    • 20044377729 scopus 로고    scopus 로고
    • cond-mat/0403262 (unpublished)
    • D. J. Reilly, cond-mat/0403262 (unpublished).
    • Reilly, D.J.1
  • 27
    • 20044365393 scopus 로고    scopus 로고
    • note
    • It is sometimes argued that spontaneous spin polarization cannot occur in quantum wires in zero magnetic field becuase of the Lieb-Mattis theorem (Ref. 27) for ideal 1D systems. In the present case, however, we generally focus on multisubbands wires in finite magnetic field, and with spin-dependent forces present. Therefore the Lieb-Mattis does not apply here. In by-passing, we also find polarization effects at zero field. Strictly speeking, such polarized solutions should not be accepted from a mathematical point of view if the wire is in the ideal 1D limit. However, a real device is never strictly 1D. Guided by experimental evidence we therefore take a pragmatic view by accepting also these solutions and give them physical significance. In fact, Fig. 1 shows a smooth, regular behavior of the observed data as the magnetic field is turned on. From a more formal point of view, we suggest that the polarized solutions at zero field indicate that local spin order may extend over a large (but not infinite) distance. In fact, the correlation length may exceed the dimensions of a real device, and for this reason the question about the Lieb-Mattis theorem appears less interesting. Similar aspects on the relation between symmetry and broken and symmetry-adapted solutions for many-electron quantum dots are discussed in Refs. 28 and 29.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.