Abstract
Peculiar property of electronic order is clarified for the two-channel Kondo lattice. With two conduction electrons per site, the order parameter is a composite quantity involving both local and itinerant degrees of freedom. In contrast to the ordinary Kondo lattice, a heavy electron band is absent above the transition temperature, but is rapidly formed below it. The change of entropy associated with the ordering is found to be close to ln ∞2 per site. This entropy corresponds to the residual entropy in a two-channel Kondo impurity, which has been regarded as due to localized free Majorana particles. The present composite order is interpreted as instability of Majorana particles toward non-Kramers conduction electrons plus heavy fermions that involve localized electrons.
| Original language | English |
|---|---|
| Article number | 044707 |
| Journal | Journal of the Physical Society of Japan |
| Volume | 82 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - Apr 1 2013 |
| Externally published | Yes |
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Keywords
- Composite order
- Continuoustime quantum Monte Carlo
- Dynamical mean-field theory
- Majorana fermion
- Two-channel Kondo lattice
ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Resolution of entropy ln ∞2 by ordering in two-channel kondo lattice. / Hoshino, Shintaro; Otsuki, Junya; Kuramoto, Yoshio.
In: Journal of the Physical Society of Japan, Vol. 82, No. 4, 044707, 01.04.2013.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Resolution of entropy ln ∞2 by ordering in two-channel kondo lattice
AU - Hoshino, Shintaro
AU - Otsuki, Junya
AU - Kuramoto, Yoshio
PY - 2013/4/1
Y1 - 2013/4/1
N2 - Peculiar property of electronic order is clarified for the two-channel Kondo lattice. With two conduction electrons per site, the order parameter is a composite quantity involving both local and itinerant degrees of freedom. In contrast to the ordinary Kondo lattice, a heavy electron band is absent above the transition temperature, but is rapidly formed below it. The change of entropy associated with the ordering is found to be close to ln ∞2 per site. This entropy corresponds to the residual entropy in a two-channel Kondo impurity, which has been regarded as due to localized free Majorana particles. The present composite order is interpreted as instability of Majorana particles toward non-Kramers conduction electrons plus heavy fermions that involve localized electrons.
AB - Peculiar property of electronic order is clarified for the two-channel Kondo lattice. With two conduction electrons per site, the order parameter is a composite quantity involving both local and itinerant degrees of freedom. In contrast to the ordinary Kondo lattice, a heavy electron band is absent above the transition temperature, but is rapidly formed below it. The change of entropy associated with the ordering is found to be close to ln ∞2 per site. This entropy corresponds to the residual entropy in a two-channel Kondo impurity, which has been regarded as due to localized free Majorana particles. The present composite order is interpreted as instability of Majorana particles toward non-Kramers conduction electrons plus heavy fermions that involve localized electrons.
KW - Composite order
KW - Continuoustime quantum Monte Carlo
KW - Dynamical mean-field theory
KW - Majorana fermion
KW - Two-channel Kondo lattice
UR - http://www.scopus.com/inward/record.url?scp=84876004312&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84876004312&partnerID=8YFLogxK
U2 - 10.7566/JPSJ.82.044707
DO - 10.7566/JPSJ.82.044707
M3 - Article
AN - SCOPUS:84876004312
VL - 82
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 4
M1 - 044707
ER -