Search for multipolar instability in URu2Si2 studied by ultrasonic measurements under pulsed magnetic field

T. Yanagisawa; S. Mombetsu; H. Hidaka; H. Amitsuka; P. T. Cong; S. Yasin; S. Zherlitsyn; J. Wosnitza; K. Huang; N. Kanchanavatee; M. Janoschek; M. B. Maple; D. Aoki

doi:10.1103/PhysRevB.97.155137

Search for multipolar instability in URu2Si2 studied by ultrasonic measurements under pulsed magnetic field

T. Yanagisawa, S. Mombetsu, H. Hidaka, H. Amitsuka, P. T. Cong, S. Yasin, S. Zherlitsyn, J. Wosnitza, K. Huang, N. Kanchanavatee, M. Janoschek, M. B. Maple, D. Aoki

Materials Processing and Characterization Division

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

The elastic properties of URu2Si2 in the high magnetic field region above 40 T, over a wide temperature range from 1.5 to 120 K, were systematically investigated by means of high-frequency ultrasonic measurements. The investigation was performed at high magnetic fields to better investigate the innate bare 5f-electron properties, since the unidentified electronic thermodynamic phase of unknown origin, the so-called "hidden order" (HO), and associated hybridization of conduction and f electrons (c-f hybridization) are suppressed at high magnetic fields. From the three different transverse modes we find contrasting results; both the Γ4(B2g) and Γ5(Eg) symmetry modes C66 and C44 show elastic softening that is enhanced above 30 T, while the characteristic softening of the Γ3(B1g) symmetry mode (C11-C12)/2 is suppressed in high magnetic fields. These results underscore the presence of a hybridization-driven Γ3(B1g) lattice instability in URu2Si2. However, the results from this work cannot be explained by using existing crystalline electric field schemes applied to the quadrupolar susceptibility in a local 5f2 configuration. Instead, we present an analysis based on a band Jahn-Teller effect.

Original language	English
Article number	155137
Journal	Physical Review B
Volume	97
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevB.97.155137
Publication status	Published - 2018 Apr 17

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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Yanagisawa, T., Mombetsu, S., Hidaka, H., Amitsuka, H., Cong, P. T., Yasin, S., Zherlitsyn, S., Wosnitza, J., Huang, K., Kanchanavatee, N., Janoschek, M., Maple, M. B., & Aoki, D. (2018). Search for multipolar instability in URu2Si2 studied by ultrasonic measurements under pulsed magnetic field. Physical Review B, 97(15), [155137]. https://doi.org/10.1103/PhysRevB.97.155137

Search for multipolar instability in URu2Si2 studied by ultrasonic measurements under pulsed magnetic field. / Yanagisawa, T.; Mombetsu, S.; Hidaka, H.; Amitsuka, H.; Cong, P. T.; Yasin, S.; Zherlitsyn, S.; Wosnitza, J.; Huang, K.; Kanchanavatee, N.; Janoschek, M.; Maple, M. B.; Aoki, D.

In: Physical Review B, Vol. 97, No. 15, 155137, 17.04.2018.

Research output: Contribution to journal › Article › peer-review

@article{669d126ba44e4bf9ada7911177acf329,

title = "Search for multipolar instability in URu2Si2 studied by ultrasonic measurements under pulsed magnetic field",

abstract = "The elastic properties of URu2Si2 in the high magnetic field region above 40 T, over a wide temperature range from 1.5 to 120 K, were systematically investigated by means of high-frequency ultrasonic measurements. The investigation was performed at high magnetic fields to better investigate the innate bare 5f-electron properties, since the unidentified electronic thermodynamic phase of unknown origin, the so-called {"}hidden order{"} (HO), and associated hybridization of conduction and f electrons (c-f hybridization) are suppressed at high magnetic fields. From the three different transverse modes we find contrasting results; both the Γ4(B2g) and Γ5(Eg) symmetry modes C66 and C44 show elastic softening that is enhanced above 30 T, while the characteristic softening of the Γ3(B1g) symmetry mode (C11-C12)/2 is suppressed in high magnetic fields. These results underscore the presence of a hybridization-driven Γ3(B1g) lattice instability in URu2Si2. However, the results from this work cannot be explained by using existing crystalline electric field schemes applied to the quadrupolar susceptibility in a local 5f2 configuration. Instead, we present an analysis based on a band Jahn-Teller effect.",

author = "T. Yanagisawa and S. Mombetsu and H. Hidaka and H. Amitsuka and Cong, {P. T.} and S. Yasin and S. Zherlitsyn and J. Wosnitza and K. Huang and N. Kanchanavatee and M. Janoschek and Maple, {M. B.} and D. Aoki",

note = "Funding Information: The present research was supported by JSPS KAKENHI Grants No. JP17K05525(C), No. JP16H04006, No. JP15H05882, No. JP15H05884, No. JP15H05885, No. JP15H05745, No. JP15KK0146, No. JP15K21732, No. JP23740250, and No. JP23102701, and the Strategic Young Researcher Overseas Visits Program for Accelerating Brain Circulation from JSPS. Experiments performed in the U.S. were supported by U.S. DOE Grant No. DE-FG02-04-ER46105. Experiments performed at CEA Grenoble were supported by the ERC Starting Grant (NewHeavyFermion), and ANR (SINUS). One of the authors (T.Y.) would like to thank Prof. J. A. Mydosh, Prof. H. Kusunose, Dr. T. Keiber, and D. Landry for fruitful discussions. M.J. gratefully acknowledges financial support by the Alexander von Humboldt foundation. We also acknowledge the support of the Hochfeld-Magnetlabor Dresden at HZDR, a member of the European Magnetic Field Laboratory (EMFL). ",

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T1 - Search for multipolar instability in URu2Si2 studied by ultrasonic measurements under pulsed magnetic field

AU - Yanagisawa, T.

AU - Mombetsu, S.

AU - Hidaka, H.

AU - Amitsuka, H.

AU - Cong, P. T.

AU - Yasin, S.

AU - Zherlitsyn, S.

AU - Wosnitza, J.

AU - Huang, K.

AU - Kanchanavatee, N.

AU - Janoschek, M.

AU - Maple, M. B.

AU - Aoki, D.

N1 - Funding Information: The present research was supported by JSPS KAKENHI Grants No. JP17K05525(C), No. JP16H04006, No. JP15H05882, No. JP15H05884, No. JP15H05885, No. JP15H05745, No. JP15KK0146, No. JP15K21732, No. JP23740250, and No. JP23102701, and the Strategic Young Researcher Overseas Visits Program for Accelerating Brain Circulation from JSPS. Experiments performed in the U.S. were supported by U.S. DOE Grant No. DE-FG02-04-ER46105. Experiments performed at CEA Grenoble were supported by the ERC Starting Grant (NewHeavyFermion), and ANR (SINUS). One of the authors (T.Y.) would like to thank Prof. J. A. Mydosh, Prof. H. Kusunose, Dr. T. Keiber, and D. Landry for fruitful discussions. M.J. gratefully acknowledges financial support by the Alexander von Humboldt foundation. We also acknowledge the support of the Hochfeld-Magnetlabor Dresden at HZDR, a member of the European Magnetic Field Laboratory (EMFL).

PY - 2018/4/17

Y1 - 2018/4/17

N2 - The elastic properties of URu2Si2 in the high magnetic field region above 40 T, over a wide temperature range from 1.5 to 120 K, were systematically investigated by means of high-frequency ultrasonic measurements. The investigation was performed at high magnetic fields to better investigate the innate bare 5f-electron properties, since the unidentified electronic thermodynamic phase of unknown origin, the so-called "hidden order" (HO), and associated hybridization of conduction and f electrons (c-f hybridization) are suppressed at high magnetic fields. From the three different transverse modes we find contrasting results; both the Γ4(B2g) and Γ5(Eg) symmetry modes C66 and C44 show elastic softening that is enhanced above 30 T, while the characteristic softening of the Γ3(B1g) symmetry mode (C11-C12)/2 is suppressed in high magnetic fields. These results underscore the presence of a hybridization-driven Γ3(B1g) lattice instability in URu2Si2. However, the results from this work cannot be explained by using existing crystalline electric field schemes applied to the quadrupolar susceptibility in a local 5f2 configuration. Instead, we present an analysis based on a band Jahn-Teller effect.

AB - The elastic properties of URu2Si2 in the high magnetic field region above 40 T, over a wide temperature range from 1.5 to 120 K, were systematically investigated by means of high-frequency ultrasonic measurements. The investigation was performed at high magnetic fields to better investigate the innate bare 5f-electron properties, since the unidentified electronic thermodynamic phase of unknown origin, the so-called "hidden order" (HO), and associated hybridization of conduction and f electrons (c-f hybridization) are suppressed at high magnetic fields. From the three different transverse modes we find contrasting results; both the Γ4(B2g) and Γ5(Eg) symmetry modes C66 and C44 show elastic softening that is enhanced above 30 T, while the characteristic softening of the Γ3(B1g) symmetry mode (C11-C12)/2 is suppressed in high magnetic fields. These results underscore the presence of a hybridization-driven Γ3(B1g) lattice instability in URu2Si2. However, the results from this work cannot be explained by using existing crystalline electric field schemes applied to the quadrupolar susceptibility in a local 5f2 configuration. Instead, we present an analysis based on a band Jahn-Teller effect.

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