Superconductivity in Boron-Doped Carbon Nanotubes

Haruyama, J.; Matsudaira, M.; Reppert, Jason; Rao, Apparao M.; Koretsune, Takashi; Saito, Susumu; Sano, Hirotaka; Iye, Yasuhiro

doi:10.1007/s10948-010-0906-6

Cited by 10 publications

(5 citation statements)

References 24 publications

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“…For example, diamond is completely composed of sp 3 -coordinated carbon atoms and exhibits superconductivity when carbon atoms are replaced with boron atoms, owing to shallow acceptor states created by boron doping [1][2][3]. Carbon nanotubes where carbon atoms are sp 2 -hybridized also become superconducting when the Fermi energy is tuned to be close to the van Hove singularity in the density of states by hole doping [4,5]. Fullerene crystals and graphite become superconductors when alkali atoms are doped into their empty spaces [6,7].…”

Section: Introductionmentioning

confidence: 99%

“…Q-carbon exhibits superconductivity when doped with boron [10,11]. The reported superconducting transition temperatures (T c ) are 36 K and 55 K for boron doping concentration of 17% and 25%, which are significantly higher than those reported on boron-doped diamond (11 K) and carbon nanotubes (19 K under pressure) [1][2][3][4][5]. The reported T c for the Q-carbon is higher than that of MgB 2 (39 K) [12].…”

Section: Introductionmentioning

confidence: 99%

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Role of atomic coordination on superconducting properties of boron-doped amorphous carbon

Sakai

Chelikowsky

Cohen

2019

Phys. Rev. Materials

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We study the effect of atomic coordination (orbital hybridization) on superconducting properties of boron-doped amorphous carbon. The ratio of three-fold coordinated (sp 2 -hybridized) and fourfold coordinated (sp 3 -hybridized) atoms in the system is found to have an impact on their electronic, vibrational and superconducting properties. Our findings show that a high proportion of four-fold coordination in both carbon and boron atoms are important for realizing a high superconducting transition temperature.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Role of atomic coordination on superconducting properties of boron-doped amorphous carbon

Sakai

Chelikowsky

Cohen

2019

Phys. Rev. Materials

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“…Besides the well-known Luttinger liquid (LL) state, intrinsic superconductivity has been experimentally observed or theoretically predicted in SWCNTs, [1][2][3][4][5][6][7][8][9][10][11][12][13] CNT ropes, [14][15][16][17] multiwall CNTs (MWCNTs), [18][19][20][21][22][23] and doped CNTs. [24][25][26][27] For the case of ultrathin diameter 4-Angstrom metallic SWCNTs, experimental observation of the Meissner effect in 2001 1 has prompted some theoretical works exploring the possibility of superconductivity being the ground state of the system. While some authors predicted Peierls ground state, [28][29][30][31][32] others predicted superconductivity.…”

Section: Introductionmentioning

confidence: 99%

Crossover from Peierls distortion to one-dimensional superconductivity in arrays of (5,0) carbon nanotubes

et al. 2011

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By performing second-order renormalization group analysis on thin arrays of 4-Angstrom (5,0) carbon nanotubes (CNTs) embedded in aluminophosphate-five (AFI) zeolite crystals, we identify singlet superconductivity instability to be dominant at low temperatures, attributable to the screening of the electron-electron Coulomb interaction in the array configuration. Our analysis also shows that there is a crossover as the system scales to lower energy/temperatures, whereby one-dimensional (1D) superconductivity is the ground state, but the response function of the Peierls distortion/charge density wave (CDW) order dominates at the higher energy regime. This crossover behavior indicates that for a thin array of (5,0) CNTs the CDW order may represent an excited state of the array, so that the CDW characteristics can appear at finite temperatures, in conjunction with 1D superconductivity. Experimental results are presented to support this interpretation.

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“…The highest superconducting transition temperature (T c ) is 11.5 and 33 K for graphite (CaC 6 ) and fullurene (Cs x Rb y C 60 ) cases, respectively. Boron (hole) doping in carbon nanotube causes superconductivity with the highest T c of 19 K under pressure [13,14]. Boron-doped sp 3 cubic diamond exhibits superconductivity due to shallow acceptor states with a T c up to 11 K [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Heavy boron doping in superconducting carbon materials

Sakai

Chelikowsky

Cohen

2020

Phys. Rev. Materials

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We examine physical properties of heavily boron-doped sp 3 hybridized carbon allotropes: cubic diamond, hexagonal diamond, and body centered tetragonal C 4. The structural similarity between cubic diamond and hexagonal diamond leads to similar responses to substitutional boron doping. On the other hand, body centered tetragonal C 4 exhibits distinct structural and electronic properties because of its characteristic structure. Our study also shows that the superconducting transition temperatures up to 60 K are possible in heavily-doped carbon materials despite their various atomistic structures.

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Superconductivity in Boron-Doped Carbon Nanotubes

Cited by 10 publications

References 24 publications

Role of atomic coordination on superconducting properties of boron-doped amorphous carbon

Role of atomic coordination on superconducting properties of boron-doped amorphous carbon

Crossover from Peierls distortion to one-dimensional superconductivity in arrays of (5,0) carbon nanotubes

Heavy boron doping in superconducting carbon materials

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