Full superconducting gap and type-I to type-II superconductivity transition in single crystalline NbGe2
We report a mechanical point-contact spectroscopy study on the single crystalline NbGe\(_2\) with a superconducting transition temperature \(T\rm_c\) = 2.0 - 2.1 K. The differential conductance curves at 0.3 K can be well fitted by a single gap s-wave Blonder-Tinkham-Klapwijk model and the temperatu...
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| creator | Zhang, Dongting Le, Tian Lv, Baijing Yin, Lichang Chen, Chufan Nie, Zhiyong Su, Dajun Yuan, Huiqiu Zhu-An, Xu Lu, Xin |
| description | We report a mechanical point-contact spectroscopy study on the single crystalline NbGe\(_2\) with a superconducting transition temperature \(T\rm_c\) = 2.0 - 2.1 K. The differential conductance curves at 0.3 K can be well fitted by a single gap s-wave Blonder-Tinkham-Klapwijk model and the temperature dependent gap follows a standard Bardeen-Cooper-Schrieffer behavior, yielding \(\Delta_0 \sim\) 0.32 meV and 2\(\Delta_0\)/$k\rm_{B}$$T\rm_{c}\( = 3.62 in the weak coupling limit. In magnetic field, the superconducting gap at 0.3 K keeps constant up to \)H_{c1}\sim\(150 Oe and gradually decreases until \)H_{c2}\sim\(350 Oe, indicating NbGe\)_2$ going through a transition from type-I to type-II (possible type-II/1) superconductor at low temperature. |
| doi_str_mv | 10.48550/arxiv.2106.14419 |
| format | Article |
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The differential conductance curves at 0.3 K can be well fitted by a single gap s-wave Blonder-Tinkham-Klapwijk model and the temperature dependent gap follows a standard Bardeen-Cooper-Schrieffer behavior, yielding \(\Delta_0 \sim\) 0.32 meV and 2\(\Delta_0\)/$k\rm_{B}$$T\rm_{c}\( = 3.62 in the weak coupling limit. In magnetic field, the superconducting gap at 0.3 K keeps constant up to \)H_{c1}\sim\(150 Oe and gradually decreases until \)H_{c2}\sim\(350 Oe, indicating NbGe\)_2$ going through a transition from type-I to type-II (possible type-II/1) superconductor at low temperature.</description><identifier>EISSN: 2331-8422</identifier><identifier>DOI: 10.48550/arxiv.2106.14419</identifier><language>eng</language><publisher>Ithaca: Cornell University Library, arXiv.org</publisher><subject>Crystal structure ; Crystallinity ; Low temperature ; Physics - Superconductivity ; Resistance ; Superconductivity ; Temperature dependence ; Transition temperature</subject><ispartof>arXiv.org, 2021-06</ispartof><rights>2021. This work is published under http://arxiv.org/licenses/nonexclusive-distrib/1.0/ (the “License”). 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The differential conductance curves at 0.3 K can be well fitted by a single gap s-wave Blonder-Tinkham-Klapwijk model and the temperature dependent gap follows a standard Bardeen-Cooper-Schrieffer behavior, yielding \(\Delta_0 \sim\) 0.32 meV and 2\(\Delta_0\)/$k\rm_{B}$$T\rm_{c}\( = 3.62 in the weak coupling limit. 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The differential conductance curves at 0.3 K can be well fitted by a single gap s-wave Blonder-Tinkham-Klapwijk model and the temperature dependent gap follows a standard Bardeen-Cooper-Schrieffer behavior, yielding \(\Delta_0 \sim\) 0.32 meV and 2\(\Delta_0\)/$k\rm_{B}$$T\rm_{c}\( = 3.62 in the weak coupling limit. In magnetic field, the superconducting gap at 0.3 K keeps constant up to \)H_{c1}\sim\(150 Oe and gradually decreases until \)H_{c2}\sim\(350 Oe, indicating NbGe\)_2$ going through a transition from type-I to type-II (possible type-II/1) superconductor at low temperature.</abstract><cop>Ithaca</cop><pub>Cornell University Library, arXiv.org</pub><doi>10.48550/arxiv.2106.14419</doi><oa>free_for_read</oa></addata></record> |
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| subjects | Crystal structure Crystallinity Low temperature Physics - Superconductivity Resistance Superconductivity Temperature dependence Transition temperature |
| title | Full superconducting gap and type-I to type-II superconductivity transition in single crystalline NbGe2 |
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