Pressure tuning of putative quantum criticality on YbV6Sn6
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arXiv
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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866908534889775104 |
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| author | Sabino, P. C. Mendonça-Ferreira, L. Dias, J. G. Vasques, G. G. Dutra, M. Pizzi, H. Pagliuso, P. G. Avila, M. A. |
| author_facet | Sabino, P. C. Mendonça-Ferreira, L. Dias, J. G. Vasques, G. G. Dutra, M. Pizzi, H. Pagliuso, P. G. Avila, M. A. |
| contents | YbV$_6$Sn$_6$ is a recently discovered heavy-fermion compound that orders at T$_N\approx 0.4$ K and exhibits a magnetic field-tuned quantum critical point at $H \approx 10$ kOe. In this work, we have grown YbV$_6$Sn$_6$ single crystals by the self-flux method, to investigate their physical properties at ambient pressure and their electrical transport properties under hydrostatic pressure. At higher temperatures, we observed a decrease in the Kondo temperature, accompanied by the appearance of a local minimum followed by a local maximum, associated with the onset of the coherent Kondo regime. Power law fitting at low temperatures indicated a recovery of the Fermi-liquid regime for pressures below 1 GPa. Above 1 GPa, a reentrance of non-Fermi-liquid behavior is suggested by a decrease in the exponent $n$, accompanied by a substantial increase in the parameter $A$, indicating the approach of a new quantum criticality tuned by hydrostatic pressure. The broad range of interactions present in YbV$_6$Sn$_6$, including RKKY, crystalline electric field (CEF), and Kondo lattice effects, appears to lead to a complex phase diagram. We present a putative phase diagram featuring double quantum criticality tuned by both magnetic field and hydrostatic pressure. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2509_09817 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Pressure tuning of putative quantum criticality on YbV6Sn6 Sabino, P. C. Mendonça-Ferreira, L. Dias, J. G. Vasques, G. G. Dutra, M. Pizzi, H. Pagliuso, P. G. Avila, M. A. Strongly Correlated Electrons YbV$_6$Sn$_6$ is a recently discovered heavy-fermion compound that orders at T$_N\approx 0.4$ K and exhibits a magnetic field-tuned quantum critical point at $H \approx 10$ kOe. In this work, we have grown YbV$_6$Sn$_6$ single crystals by the self-flux method, to investigate their physical properties at ambient pressure and their electrical transport properties under hydrostatic pressure. At higher temperatures, we observed a decrease in the Kondo temperature, accompanied by the appearance of a local minimum followed by a local maximum, associated with the onset of the coherent Kondo regime. Power law fitting at low temperatures indicated a recovery of the Fermi-liquid regime for pressures below 1 GPa. Above 1 GPa, a reentrance of non-Fermi-liquid behavior is suggested by a decrease in the exponent $n$, accompanied by a substantial increase in the parameter $A$, indicating the approach of a new quantum criticality tuned by hydrostatic pressure. The broad range of interactions present in YbV$_6$Sn$_6$, including RKKY, crystalline electric field (CEF), and Kondo lattice effects, appears to lead to a complex phase diagram. We present a putative phase diagram featuring double quantum criticality tuned by both magnetic field and hydrostatic pressure. |
| title | Pressure tuning of putative quantum criticality on YbV6Sn6 |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2509.09817 |