-
- Nasu Joji
- 東京工業大学大学院理工学研究科
-
- Udagawa Masafumi
- (現)学習院大学理学部:東京大学大学院工学系研究科
-
- Motome Yukitoshi
- 東京大学大学院工学系研究科
Bibliographic Information
- Other Title
-
- キタエフ量子スピン液体の"気液"相転移(最近の研究から)
- キタエフ量子スピン液体の"気液"相転移
- キタエフ リョウシ スピン エキタイ ノ"キエキ"ソウ テンイ
Search this article
Abstract
The Kitaev model has recently attracted considerable attention in broad areas of research owing to the topological nature and quantum spin-liquid (QSL) ground states. This is defined on a honeycomb lattice, and is exactly solvable due to the Ising conserved quantities on each hexagon. In this study, we investigate the thermodynamics of a three-dimensional extension of the Kitaev model defined on a hyperhoneycomb lattice. This model can be rewritten as a free Majorana fermion system coupled with Ising variables. Using this representation, we have performed the Monte Carlo simulation and analyzed the thermodynamic properties. We find that the model exhibits a finite-temperature phase transition between the QSLs and paramagnet in the whole parameter range. This result indicates that the QSL phases at low temperatures are always distinguished from the high-temperature paramagnet by a phase transition. We also find that the difference between QSL and paramagnet comes from the topological nature of the excitations.
Journal
-
- Butsuri
-
Butsuri 70 (10), 776-781, 2015-10-05
The Physical Society of Japan
- Tweet
Keywords
Details 詳細情報について
-
- CRID
- 1390845713088202368
-
- NII Article ID
- 110009989083
-
- NII Book ID
- AN00196952
-
- ISSN
- 24238872
- 00290181
-
- NDL BIB ID
- 026772218
-
- Text Lang
- ja
-
- Data Source
-
- JaLC
- NDL
- CiNii Articles
-
- Abstract License Flag
- Disallowed