Diode Effect May Assist Finding Proper Superconductivity Mechanism in Copper Oxides
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arXiv
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| Format: | Preprint |
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2026
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| _version_ | 1866908855311532032 |
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| author | Gulian, Armen Teknowijoyo, Serafim Nikoghosyan, Vahan |
| author_facet | Gulian, Armen Teknowijoyo, Serafim Nikoghosyan, Vahan |
| contents | We present measurements demonstrating that copper-oxide high-temperature superconductors can exhibit broken time-reversal symmetry in the absence of external magnetic fields. Using $Tl_{2}Ba_{2}CaCu_{2}O_{8}$ microbridges, we observe a pronounced superconducting diode effect at 100 K under strictly zero-field conditions. This nonreciprocal response remains unchanged in magnetic fields up to $\pm 100 Oe$. Our results are consistent with recent reports of zero-field diode behavior in $Bi_{2}Sr_{2}CaCu_{2}O_{8+δ }$ and together indicate that time-reversal symmetry breaking may be an intrinsic property of the cuprate superconducting state. These findings significantly constrain theoretical models of high-temperature superconductivity that rely on time-reversal-symmetric mechanisms. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_23552 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Diode Effect May Assist Finding Proper Superconductivity Mechanism in Copper Oxides Gulian, Armen Teknowijoyo, Serafim Nikoghosyan, Vahan Superconductivity We present measurements demonstrating that copper-oxide high-temperature superconductors can exhibit broken time-reversal symmetry in the absence of external magnetic fields. Using $Tl_{2}Ba_{2}CaCu_{2}O_{8}$ microbridges, we observe a pronounced superconducting diode effect at 100 K under strictly zero-field conditions. This nonreciprocal response remains unchanged in magnetic fields up to $\pm 100 Oe$. Our results are consistent with recent reports of zero-field diode behavior in $Bi_{2}Sr_{2}CaCu_{2}O_{8+δ }$ and together indicate that time-reversal symmetry breaking may be an intrinsic property of the cuprate superconducting state. These findings significantly constrain theoretical models of high-temperature superconductivity that rely on time-reversal-symmetric mechanisms. |
| title | Diode Effect May Assist Finding Proper Superconductivity Mechanism in Copper Oxides |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2602.23552 |