Interplay between topological insulators and superconductors

被引：45

作者：

Wang, Jian ^{[1
,2
,3
,4
]}

Chang, Cui-Zu ^{[5
,6
]}

Li, Handong ^{[7
,8
]}

He, Ke ^{[5
]}

Zhang, Duming ^{[1
,2
]}

Singh, Meenakshi ^{[1
,2
]}

Ma, Xu-Cun ^{[5
]}

Samarth, Nitin ^{[1
,2
]}

Xie, Maohai ^{[7
]}

Xue, Qi-Kun ^{[5
,6
]}

Chan, M. H. W. ^{[1
,2
]}

机构：

[1] Penn State Univ, Ctr Nanoscale Sci, University Pk, PA 16802 USA

[2] Penn State Univ, Dept Phys, University Pk, PA 16802 USA

[3] Peking Univ, Int Ctr Quantum Mat, Beijing 100871, Peoples R China

[4] Peking Univ, State Key Lab Mesoscop Phys, Sch Phys, Beijing 100871, Peoples R China

[5] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China

[6] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China

[7] Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China

[8] Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Sichuan, Peoples R China

来源：

PHYSICAL REVIEW B | 2012年 / 85卷 / 04期

基金：

中国国家自然科学基金; 美国国家科学基金会;

关键词：

SINGLE DIRAC CONE; SURFACE-STATES; SUPERCURRENT; TRANSPORT; BI2SE3;

D O I：

10.1103/PhysRevB.85.045415

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Topological insulators are insulating in the bulk but possess metallic surface states protected by time-reversal symmetry. Here, we report on a detailed electronic transport study in high-quality Bi2Se3 topological insulator thin films contacted by superconducting (In, Al, and W) electrodes. The resistance of the film shows an abrupt and significant upturn when the electrodes become superconducting. In turn, the Bi2Se3 film greatly weakens the superconductivity of the electrodes, significantly reducing both their transition temperatures and their critical fields. A possible interpretation of these results is that the superconducting electrodes are accessing the surface states and the experimental results are consequences of the interplay between the Cooper pairs of the electrodes and the spin-polarized current of the surface states in Bi2Se3.

引用

页数：7

共 47 条

[1]

Analytis JG, 2010, NAT PHYS, V6, P960, DOI [10.1038/nphys1861, 10.1038/NPHYS1861]

[2] TRANSITION FROM METALLIC TO TUNNELING REGIMES IN SUPERCONDUCTING MICRO-CONSTRICTIONS - EXCESS CURRENT, CHARGE IMBALANCE, AND SUPER-CURRENT CONVERSION [J].

BLONDER, GE ;

TINKHAM, M ;

KLAPWIJK, TM .

PHYSICAL REVIEW B, 1982, 25 (07) :4515-4532

[3] Quantum Interference in Macroscopic Crystals of Nonmetallic Bi2Se3 [J].

Checkelsky, J. G. ;

Hor, Y. S. ;

Liu, M. -H. ;

Qu, D. -X. ;

Cava, R. J. ;

Ong, N. P. .

PHYSICAL REVIEW LETTERS, 2009, 103 (24)

[4] Gate-Voltage Control of Chemical Potential and Weak Antilocalization in Bi2Se3 [J].

Chen, J. ;

Qin, H. J. ;

Yang, F. ;

Liu, J. ;

Guan, T. ;

Qu, F. M. ;

Zhang, G. H. ;

Shi, J. R. ;

Xie, X. C. ;

Yang, C. L. ;

Wu, K. H. ;

Li, Y. Q. ;

Lu, L. .

PHYSICAL REVIEW LETTERS, 2010, 105 (17)

[5] BOUNDARY EFFECTS IN SUPERCONDUCTORS [J].

DEGENNES, PG .

REVIEWS OF MODERN PHYSICS, 1964, 36 (1P1) :225-+

[6] Topological insulators in three dimensions [J].

Fu, Liang ;

Kane, C. L. ;

Mele, E. J. .

PHYSICAL REVIEW LETTERS, 2007, 98 (10)

[7] Topological insulators with inversion symmetry [J].

Fu, Liang ;

Kane, C. L. .

PHYSICAL REVIEW B, 2007, 76 (04)

[8] Superconducting proximity effect and Majorana fermions at the surface of a topological insulator [J].

Fu, Liang ;

Kane, C. L. .

PHYSICAL REVIEW LETTERS, 2008, 100 (09)

[9] Colloquium: Topological insulators [J].

Hasan, M. Z. ;

Kane, C. L. .

REVIEWS OF MODERN PHYSICS, 2010, 82 (04) :3045-3067

[10] Three-Dimensional Topological Insulators [J].

Hasan, M. Zahid ;

Moore, Joel E. .

ANNUAL REVIEW OF CONDENSED MATTER PHYSICS, VOL 2, 2011, 2 :55-78

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