Direction‐Dependent Conduction Polarity in Altermagnetic CrSb
Abstract CrSb has recently gained immense attention as an altermagnetic candidate. This work reports on the experimental observation of direction‐dependent conduction polarity (DDCP) in altermagnetic CrSb through Hall and Seebeck thermopower measurements. Conduction is dominated by holes along the c...
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| Format: | Article |
| Language: | English |
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Wiley
2025-07-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202502226 |
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| author | Banik Rai Krishnendu Patra Satyabrata Bera Sk Kalimuddin Kakan Deb Mintu Mondal Priya Mahadevan Nitesh Kumar |
| author_facet | Banik Rai Krishnendu Patra Satyabrata Bera Sk Kalimuddin Kakan Deb Mintu Mondal Priya Mahadevan Nitesh Kumar |
| author_sort | Banik Rai |
| collection | DOAJ |
| description | Abstract CrSb has recently gained immense attention as an altermagnetic candidate. This work reports on the experimental observation of direction‐dependent conduction polarity (DDCP) in altermagnetic CrSb through Hall and Seebeck thermopower measurements. Conduction is dominated by holes along the c‐axis and by electrons in the ab‐plane of the hexagonal crystal of CrSb. Density functional theory (DFT) calculations indicate that DDCP in CrSb arises from a multicarrier mechanism, where electrons and holes living in distinct bands dominate conduction along different crystallographic directions. Furthermore, DFT predicts that DDCP exists within a narrow energy window near the Fermi level and is sensitive to small doping levels. This prediction is experimentally validated by the loss of DDCP in hole‐doped Cr0.98V0.02Sb. These findings highlight the potential for tunable electronic behavior in CrSb, offering promising avenues for applications in devices that require both p‐type and n‐type functionalities within a single material. |
| format | Article |
| id | doaj-art-83fbf10d2a7f4e47aed474bfd062229d |
| institution | DOAJ |
| issn | 2198-3844 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj-art-83fbf10d2a7f4e47aed474bfd062229d2025-08-20T03:12:04ZengWileyAdvanced Science2198-38442025-07-011227n/an/a10.1002/advs.202502226Direction‐Dependent Conduction Polarity in Altermagnetic CrSbBanik Rai0Krishnendu Patra1Satyabrata Bera2Sk Kalimuddin3Kakan Deb4Mintu Mondal5Priya Mahadevan6Nitesh Kumar7Department of Condensed Matter and Materials Physics S. N. Bose National Centre for Basic Sciences Salt Lake City Kolkata 700106 IndiaDepartment of Condensed Matter and Materials Physics S. N. Bose National Centre for Basic Sciences Salt Lake City Kolkata 700106 IndiaSchool of Physical Sciences Indian Association for the Cultivation of Science Jadavpur Kolkata 700032 IndiaSchool of Physical Sciences Indian Association for the Cultivation of Science Jadavpur Kolkata 700032 IndiaDepartment of Condensed Matter and Materials Physics S. N. Bose National Centre for Basic Sciences Salt Lake City Kolkata 700106 IndiaSchool of Physical Sciences Indian Association for the Cultivation of Science Jadavpur Kolkata 700032 IndiaDepartment of Condensed Matter and Materials Physics S. N. Bose National Centre for Basic Sciences Salt Lake City Kolkata 700106 IndiaDepartment of Condensed Matter and Materials Physics S. N. Bose National Centre for Basic Sciences Salt Lake City Kolkata 700106 IndiaAbstract CrSb has recently gained immense attention as an altermagnetic candidate. This work reports on the experimental observation of direction‐dependent conduction polarity (DDCP) in altermagnetic CrSb through Hall and Seebeck thermopower measurements. Conduction is dominated by holes along the c‐axis and by electrons in the ab‐plane of the hexagonal crystal of CrSb. Density functional theory (DFT) calculations indicate that DDCP in CrSb arises from a multicarrier mechanism, where electrons and holes living in distinct bands dominate conduction along different crystallographic directions. Furthermore, DFT predicts that DDCP exists within a narrow energy window near the Fermi level and is sensitive to small doping levels. This prediction is experimentally validated by the loss of DDCP in hole‐doped Cr0.98V0.02Sb. These findings highlight the potential for tunable electronic behavior in CrSb, offering promising avenues for applications in devices that require both p‐type and n‐type functionalities within a single material.https://doi.org/10.1002/advs.202502226altermagnetdirection‐dependent conduction polarityelectrical transportFermi surface geometrySeebeck effect |
| spellingShingle | Banik Rai Krishnendu Patra Satyabrata Bera Sk Kalimuddin Kakan Deb Mintu Mondal Priya Mahadevan Nitesh Kumar Direction‐Dependent Conduction Polarity in Altermagnetic CrSb Advanced Science altermagnet direction‐dependent conduction polarity electrical transport Fermi surface geometry Seebeck effect |
| title | Direction‐Dependent Conduction Polarity in Altermagnetic CrSb |
| title_full | Direction‐Dependent Conduction Polarity in Altermagnetic CrSb |
| title_fullStr | Direction‐Dependent Conduction Polarity in Altermagnetic CrSb |
| title_full_unstemmed | Direction‐Dependent Conduction Polarity in Altermagnetic CrSb |
| title_short | Direction‐Dependent Conduction Polarity in Altermagnetic CrSb |
| title_sort | direction dependent conduction polarity in altermagnetic crsb |
| topic | altermagnet direction‐dependent conduction polarity electrical transport Fermi surface geometry Seebeck effect |
| url | https://doi.org/10.1002/advs.202502226 |
| work_keys_str_mv | AT banikrai directiondependentconductionpolarityinaltermagneticcrsb AT krishnendupatra directiondependentconductionpolarityinaltermagneticcrsb AT satyabratabera directiondependentconductionpolarityinaltermagneticcrsb AT skkalimuddin directiondependentconductionpolarityinaltermagneticcrsb AT kakandeb directiondependentconductionpolarityinaltermagneticcrsb AT mintumondal directiondependentconductionpolarityinaltermagneticcrsb AT priyamahadevan directiondependentconductionpolarityinaltermagneticcrsb AT niteshkumar directiondependentconductionpolarityinaltermagneticcrsb |