To the theory of spin–charge separation in one-dimensional correlated electron systems
Spin—charge separation is considered to be one of the key properties that distinguish low-dimensional electron systems from others. Three-dimensional correlated electron systems are described by the Fermi liquid theory. There, low-energy excitations (quasiparticles) are reminiscent of noninteract...
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| Datum: | 2004 |
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| 1. Verfasser: | |
| Format: | Artikel |
| Sprache: | English |
| Veröffentlicht: |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2004
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| Schriftenreihe: | Физика низких температур |
| Schlagworte: | |
| Online Zugang: | http://dspace.nbuv.gov.ua/handle/123456789/119852 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Zitieren: | To the theory of spin–charge separation in one-dimensional correlated electron systems / A.A. Zvyagin // Физика низких температур. — 2004. — Т. 30, № 9. — С. 969–973. — Бібліогр.: 20 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| Zusammenfassung: | Spin—charge separation is considered to be one of the key properties that distinguish low-dimensional
electron systems from others. Three-dimensional correlated electron systems are described
by the Fermi liquid theory. There, low-energy excitations (quasiparticles) are reminiscent
of noninteracting electrons: They carry charges e and spins 1/2. It is believed that for any one-dimensional
correlated electron system, low-lying electron excitations carry either only spin and no
charge, or only charge without spin. That is why recent experiments looked for such low-lying collective
electron excitations, one of which carries only spin, and the other carries only charge. Here
we show that despite the fact that for exactly solvable one-dimensional correlated electron models
there exist excitations which carry only spin and only charge, in all these models with short-range
interactions the low-energy physics is described by low-lying collective excitations, one of which
carries both spin and charge. |
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