Bosonic Anomalies in Boron-Doped Polycrystalline Diamond

被引：35

作者：

Zhang, Gufei ^{[1
]}

Samuely, Tomas ^{[2
,3
]}

Kacmarcik, Jozef ^{[2
,3
]}

Ekimov, Evgeny A. ^{[4
]}

Li, Jun ^{[5
]}

Vanacken, Johan ^{[1
]}

Szabo, Pavol ^{[2
,3
]}

Huang, Junwei ^{[1
]}

Pereira, Paulo J. ^{[1
]}

Cerbu, Dorin ^{[1
]}

Moshchalkov, Victor V. ^{[1
]}

机构：

[1] Katholieke Univ Leuven, INPAC Insititute Nanoscale Phys & Chem, Celestijnenlaan 200D, B-3001 Leuven, Belgium

[2] Slovak Acad Sci, Inst Expt Phys, Ctr Low Temp Phys, Kosice 04001, Slovakia

[3] Safarik Univ, Fac Sci, Kosice 04001, Slovakia

[4] Russian Acad Sci, Vereshchagin Inst High Pressure Phys, Troitsk 142190, Moscow Region, Russia

[5] Nanjing Univ, RISE, Nanjing 210093, Jiangsu, Peoples R China

来源：

PHYSICAL REVIEW APPLIED | 2016年 / 6卷 / 06期

关键词：

THIN-FILMS; SUPERCONDUCTIVITY; TEMPERATURE; TRANSITION; TIPS; PEAK;

D O I：

10.1103/PhysRevApplied.6.064011

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Quantum confinement and coherence effects are considered the cause of many specific features for systems which are generally low dimensional, strongly disordered, and/or situated in the vicinity of the metal-insulator transition. Here, we report on the observation of anomalous resistance peak and specific heat peaks superimposed at the superconducting transition of heavily boron-doped polycrystalline bulk diamond, which is a three-dimensional system situated deep on the metallic side of the boron-doping-driven metal-insulator transition in diamond. The anomalous resistance peak and specific heat peaks are interpreted as a result of confinement and coherence effects in the presence of intrinsic and extrinsic granularity. Our data, obtained for superconducting diamond, provide a reference for understanding the superconductivity in other granular disordered systems. Furthermore, our study brings attention to the significant influence of granular disorder on the physical properties of boron-doped diamond, which is considered a promising candidate for electronics applications.

引用

页数：9

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