Surface Majorana cone of the topological superfluid 3He B phase

Ryuji Nomura; Satoshi Murakawa; Masahiro Wasai; Kouki Akiyama; Takeru Nakao; Yuichi Okuda

doi:10.1016/j.physe.2013.06.006

Surface Majorana cone of the topological superfluid ³He B phase

Ryuji Nomura, Satoshi Murakawa, Masahiro Wasai, Kouki Akiyama, Takeru Nakao, Yuichi Okuda

Department of Physics

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

Topological superfluids and superconductors have been theoretically proposed, and it is now necessary to experimentally confirm their existence. Superfluid ³He should be the ideal test subject for topological theories because its bulk state is established to be that of a spin-triplet p-wave superfluid. Surface Andreev bound states of superfluid ³He were investigated by transverse acoustic impedance measurements and their linear dispersion was confirmed on a highly specular wall. The superfluid ³He B phase was found to be a topological superfluid showing bulk-edge correspondence and a surface Majorana cone was confirmed on the surface. Possible manifestations of the Majorana nature of the surface states are discussed.

Original language	English
Pages (from-to)	42-47
Number of pages	6
Journal	Physica E: Low-Dimensional Systems and Nanostructures
Volume	55
DOIs	https://doi.org/10.1016/j.physe.2013.06.006
Publication status	Published - 2014 Jan

Keywords

Andreev bound state
Majorana cone
Majorana fermion
Superfluid He
Topological superfluid

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Condensed Matter Physics

Access to Document

10.1016/j.physe.2013.06.006

Cite this

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title = "Surface Majorana cone of the topological superfluid 3He B phase",

abstract = "Topological superfluids and superconductors have been theoretically proposed, and it is now necessary to experimentally confirm their existence. Superfluid 3He should be the ideal test subject for topological theories because its bulk state is established to be that of a spin-triplet p-wave superfluid. Surface Andreev bound states of superfluid 3He were investigated by transverse acoustic impedance measurements and their linear dispersion was confirmed on a highly specular wall. The superfluid 3He B phase was found to be a topological superfluid showing bulk-edge correspondence and a surface Majorana cone was confirmed on the surface. Possible manifestations of the Majorana nature of the surface states are discussed.",

keywords = "Andreev bound state, Majorana cone, Majorana fermion, Superfluid He, Topological superfluid",

author = "Ryuji Nomura and Satoshi Murakawa and Masahiro Wasai and Kouki Akiyama and Takeru Nakao and Yuichi Okuda",

note = "Funding Information: This work was supported in part by a Grant-in-Aid for Scientific Research No. 22340096 and “ Topological Quantum Phenomena ” No. 22103003 from MEXT of Japan, and by the GCOE at Tokyo Tech. “Nanoscience and Quantum Physics Project”. We appreciate the long-term collaboration with Y. Aoki, Y. Wada, M. Saitoh and Y. Tamura. We are also very grateful for useful discussions with Y. Nagato, S. Higashitani, K. Nagai, T. Mizushima and M. Sato.",

year = "2014",

month = jan,

doi = "10.1016/j.physe.2013.06.006",

language = "English",

volume = "55",

pages = "42--47",

journal = "Physica E: Low-Dimensional Systems and Nanostructures",

issn = "1386-9477",

publisher = "Elsevier",

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T1 - Surface Majorana cone of the topological superfluid 3He B phase

AU - Nomura, Ryuji

AU - Murakawa, Satoshi

AU - Wasai, Masahiro

AU - Akiyama, Kouki

AU - Nakao, Takeru

AU - Okuda, Yuichi

N1 - Funding Information: This work was supported in part by a Grant-in-Aid for Scientific Research No. 22340096 and “ Topological Quantum Phenomena ” No. 22103003 from MEXT of Japan, and by the GCOE at Tokyo Tech. “Nanoscience and Quantum Physics Project”. We appreciate the long-term collaboration with Y. Aoki, Y. Wada, M. Saitoh and Y. Tamura. We are also very grateful for useful discussions with Y. Nagato, S. Higashitani, K. Nagai, T. Mizushima and M. Sato.

PY - 2014/1

Y1 - 2014/1

N2 - Topological superfluids and superconductors have been theoretically proposed, and it is now necessary to experimentally confirm their existence. Superfluid 3He should be the ideal test subject for topological theories because its bulk state is established to be that of a spin-triplet p-wave superfluid. Surface Andreev bound states of superfluid 3He were investigated by transverse acoustic impedance measurements and their linear dispersion was confirmed on a highly specular wall. The superfluid 3He B phase was found to be a topological superfluid showing bulk-edge correspondence and a surface Majorana cone was confirmed on the surface. Possible manifestations of the Majorana nature of the surface states are discussed.

AB - Topological superfluids and superconductors have been theoretically proposed, and it is now necessary to experimentally confirm their existence. Superfluid 3He should be the ideal test subject for topological theories because its bulk state is established to be that of a spin-triplet p-wave superfluid. Surface Andreev bound states of superfluid 3He were investigated by transverse acoustic impedance measurements and their linear dispersion was confirmed on a highly specular wall. The superfluid 3He B phase was found to be a topological superfluid showing bulk-edge correspondence and a surface Majorana cone was confirmed on the surface. Possible manifestations of the Majorana nature of the surface states are discussed.

KW - Andreev bound state

KW - Majorana cone

KW - Majorana fermion

KW - Superfluid He

KW - Topological superfluid

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