Abstract
The correlation effect is investigated on the hopping conduction in a magnetic field which is observed in strongly Anderson-localized regime. We calculate the electronic states in the Hubbard model with disordered on-site energies and suggest a new mechanism of the positive magnetoconductance: Zeeman effect increases the number of the high spin states in which the orbitals at the Fermi level are more extended owing to the weaker correlation effect than in the low spin states. The mechanism can explain the magnetoconductance independent of the direction of the magnetic field which was observed in a Cu-particles film. The positive magnetoconductance should be also observable in an array of quantum dots.
| Original language | English |
|---|---|
| Pages (from-to) | 1113-1114 |
| Number of pages | 2 |
| Journal | Physica B: Physics of Condensed Matter |
| Volume | 194-196 |
| Issue number | PART 1 |
| DOIs | |
| Publication status | Published - 1994 Feb 2 |
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ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
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Positive magnetoconductance of hopping conduction due to correlation effect. / Eto, Mikio.
In: Physica B: Physics of Condensed Matter, Vol. 194-196, No. PART 1, 02.02.1994, p. 1113-1114.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Positive magnetoconductance of hopping conduction due to correlation effect
AU - Eto, Mikio
PY - 1994/2/2
Y1 - 1994/2/2
N2 - The correlation effect is investigated on the hopping conduction in a magnetic field which is observed in strongly Anderson-localized regime. We calculate the electronic states in the Hubbard model with disordered on-site energies and suggest a new mechanism of the positive magnetoconductance: Zeeman effect increases the number of the high spin states in which the orbitals at the Fermi level are more extended owing to the weaker correlation effect than in the low spin states. The mechanism can explain the magnetoconductance independent of the direction of the magnetic field which was observed in a Cu-particles film. The positive magnetoconductance should be also observable in an array of quantum dots.
AB - The correlation effect is investigated on the hopping conduction in a magnetic field which is observed in strongly Anderson-localized regime. We calculate the electronic states in the Hubbard model with disordered on-site energies and suggest a new mechanism of the positive magnetoconductance: Zeeman effect increases the number of the high spin states in which the orbitals at the Fermi level are more extended owing to the weaker correlation effect than in the low spin states. The mechanism can explain the magnetoconductance independent of the direction of the magnetic field which was observed in a Cu-particles film. The positive magnetoconductance should be also observable in an array of quantum dots.
UR - http://www.scopus.com/inward/record.url?scp=0028759344&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0028759344&partnerID=8YFLogxK
U2 - 10.1016/0921-4526(94)90886-9
DO - 10.1016/0921-4526(94)90886-9
M3 - Article
AN - SCOPUS:0028759344
VL - 194-196
SP - 1113
EP - 1114
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
SN - 0921-4526
IS - PART 1
ER -