Abstract
The energy spectra of spin-(Formula presented) electrons under two-dimensional magnetic field modulations are calculated beyond the one-band approximation. Our formulation is generally applicable to a modulation field with a rectangular lattice symmetry. The field distribution within a plaquette is otherwise arbitrary. The spectra being obtained are qualitatively different from their electric-modulated counterparts. Peculiar features of the spectra are that, for an electron with a (Formula presented) factor precisely equal to 2, no matter how strong the modulation is, the zero-energy level seems to be unaffected by the modulation and is separated from higher energy levels with a nonzero energy gap. Moreover, there is a twofold degenerancy for all states with positive energies with respect to spin flip. These features agree with earlier analytical studies of the periodically magnetic-modulated systems.
| Original language | English |
|---|---|
| Pages (from-to) | 13002-13009 |
| Number of pages | 8 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 57 |
| Issue number | 20 |
| DOIs | |
| Publication status | Published - 1998 Jan 1 |
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ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
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Multiband energy spectra of spin electrons with two-dimensional magnetic modulations. / Chang, Ming Che; Yang, Min Fong.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 57, No. 20, 01.01.1998, p. 13002-13009.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Multiband energy spectra of spin electrons with two-dimensional magnetic modulations
AU - Chang, Ming Che
AU - Yang, Min Fong
PY - 1998/1/1
Y1 - 1998/1/1
N2 - The energy spectra of spin-(Formula presented) electrons under two-dimensional magnetic field modulations are calculated beyond the one-band approximation. Our formulation is generally applicable to a modulation field with a rectangular lattice symmetry. The field distribution within a plaquette is otherwise arbitrary. The spectra being obtained are qualitatively different from their electric-modulated counterparts. Peculiar features of the spectra are that, for an electron with a (Formula presented) factor precisely equal to 2, no matter how strong the modulation is, the zero-energy level seems to be unaffected by the modulation and is separated from higher energy levels with a nonzero energy gap. Moreover, there is a twofold degenerancy for all states with positive energies with respect to spin flip. These features agree with earlier analytical studies of the periodically magnetic-modulated systems.
AB - The energy spectra of spin-(Formula presented) electrons under two-dimensional magnetic field modulations are calculated beyond the one-band approximation. Our formulation is generally applicable to a modulation field with a rectangular lattice symmetry. The field distribution within a plaquette is otherwise arbitrary. The spectra being obtained are qualitatively different from their electric-modulated counterparts. Peculiar features of the spectra are that, for an electron with a (Formula presented) factor precisely equal to 2, no matter how strong the modulation is, the zero-energy level seems to be unaffected by the modulation and is separated from higher energy levels with a nonzero energy gap. Moreover, there is a twofold degenerancy for all states with positive energies with respect to spin flip. These features agree with earlier analytical studies of the periodically magnetic-modulated systems.
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UR - http://www.scopus.com/inward/citedby.url?scp=0346050335&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.57.13002
DO - 10.1103/PhysRevB.57.13002
M3 - Article
AN - SCOPUS:0346050335
VL - 57
SP - 13002
EP - 13009
JO - Physical Review B
JF - Physical Review B
SN - 2469-9950
IS - 20
ER -