77Se nuclear magnetic resonance of topological insulator Bi2Se3

被引：17

作者：

Georgieva, Nataliya M. ^{[1
]}

Rybicki, Damian ^{[1
,2
]}

Guehne, Robin ^{[1
]}

Williams, Grant V. M. ^{[3
]}

Chong, Shen V. ^{[4
]}

Kadowaki, Kazuo ^{[5
]}

Garate, Ion ^{[6
,7
]}

Haase, Jurgen ^{[1
]}

机构：

[1] Univ Leipzig, Fac Phys & Earth Sci, Linnestr 5, D-04103 Leipzig, Germany

[2] AGH Univ Sci & Technol, Dept Solid State Phys, Fac Phys & Appl Comp Sci, Al A Mickiewicza 30, PL-30059 Krakow, Poland

[3] Victoria Univ Wellington, Sch Chem & Phys Sci, POB 600, Wellington 6140, New Zealand

[4] Victoria Univ Wellington, Robinson Res Inst, POB 33436, Lower Hutt 5046, New Zealand

[5] Univ Tsukuba, Fac Pure & Appl Sci, Div Mat Sci, 1-1-1 Tennodai, Tsukuba, Ibaraki 3058573, Japan

[6] Univ Sherbrooke, Dept Phys, Sherbrooke, PQ J1K 2R1, Canada

[7] Univ Sherbrooke, Regrp Quebecois Mat Pointe, Sherbrooke, PQ J1K 2R1, Canada

来源：

PHYSICAL REVIEW B | 2016年 / 93卷 / 19期

基金：

加拿大自然科学与工程研究理事会;

关键词：

SINGLE DIRAC CONE; BI2TE3; SURFACE;

D O I：

10.1103/PhysRevB.93.195120

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Topological insulators constitute a new class of materials with an energy gap in the bulk and peculiar metallic states on the surface. We report on new features resulting from the bulk electronic structure, based on a comprehensive nuclear magnetic resonance (NMR) study of Se-77 on Bi2Se3 and Cu0.15Bi2Se3 single crystals. First, we find two resonance lines and show that they originate from the two inequivalent Se lattice sites. Second, we observe unusual field-independent linewidths and attribute them to an unexpectedly strong internuclear coupling mediated by bulk electrons. In order to support this interpretation, we present a model calculation of the indirect internuclear coupling and show that the Bloembergen-Rowland coupling is much stronger than the Ruderman-Kittel-Kasuya-Yosida coupling. Our results call for a revision of earlier NMR studies and add information concerning the bulk electronic properties.

引用

页数：9

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