High-Pressure Thermopower of the Mott Insulator Ca2RuO4

被引：0

作者：

Sano, Isuzu ^{[1
]}

Nakano, Tomohito ^{[2
]}

Nakano, Akitoshi ^{[1
]}

Taniguchi, Hiroki ^{[1
]}

Nakamura, Fumihiko ^{[3
]}

Terasaki, Ichiro ^{[1
]}

机构：

[1] Nagoya Univ, Dept Phys, Nagoya, Aichi 4648602, Japan

[2] Niigata Univ, Grad Sch Sci & Technol, Niigata 9502181, Japan

[3] Kurume Inst Technol, Dept Educ & Creat Engn, Kurume, Fukuoka 8300052, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2022年 / 91卷 / 03期

关键词：

THERMOELECTRIC-POWER; LAYERED PEROVSKITE; TRANSITION; CRYSTAL;

D O I：

10.7566/JPSJ.91.033703

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have measured and analyzed the thermopower of single-crystal samples of the Mott insulator Ca2RuO4 in high pressure up to 0.9 GPa. We find that the thermopower rapidly changes at a metal-insulator transition temperature, which is explained in terms of a percolation theory. In contrast, the thermopower in the insulator phase slightly decreases with increasing pressure well below the transition temperature, and is associated with thermodynamic quantities through the Kelvin formula. The pressure dependence is compared with the current-density dependence, and a possible origin for the current-enhanced thermopower is proposed.

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页数：5

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共 48 条

[31] Ca2RuO4: New Mott insulators of layered ruthenate [J].

Nakatsuji, S ;

Ikeda, SI ;

Maeno, Y .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1997, 66 (07) :1868-1871

[32] Anomalous Thermoelectric Response in an Orbital-Ordered Oxide Near and Far from Equilibrium [J].

Nishina, Yasuo ;

Okazaki, Ryuji ;

Yasui, Yukio ;

Nakamura, Fumihiko ;

Terasaki, Ichiro .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2017, 86 (09)

[33] Current-induced Giant Lattice Deformation in the Mott Insulator Ca2RuO4 [J].

Okazaki, Ryuji ;

Kobayashi, Kensuke ;

Kumai, Reiji ;

Nakao, Hironori ;

Murakami, Youichi ;

Nakamura, Fumihiko ;

Taniguchi, Hiroki ;

Terasaki, Ichiro .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2020, 89 (04)

[34] Disorder Effect for an Orbital Order in Ca2RuO4 Revealed by Infrared Imaging Spectroscopy [J].

Okazaki, Ryuji ;

Ikemoto, Yuka ;

Moriwaki, Taro ;

Nakamura, Fumihiko ;

Suzuki, Takashi ;

Yasui, Yukio ;

Terasaki, Ichiro .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2014, 83 (08)

[35] Current-Induced Gap Suppression in the Mott Insulator Ca2RuO4 [J].

Okazaki, Ryuji ;

Nishina, Yasuo ;

Yasui, Yukio ;

Nakamura, Fumihiko ;

Suzuki, Takashi ;

Terasaki, Ichiro .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2013, 82 (10)

[36] Kelvin formula for thermopower [J].

Peterson, Michael R. ;

Shastry, B. Sriram .

PHYSICAL REVIEW B, 2010, 82 (19)

[37] TEMPERATURE AND PRESSURE-DEPENDENCE OF THE NON-LINEAR PROPERTIES OF NBSE3 [J].

RICHARD, J ;

MONCEAU, P .

SOLID STATE COMMUNICATIONS, 1980, 33 (06) :635-639

[38] An organic thyristor [J].

Sawano, F ;

Terasaki, I ;

Mori, H ;

Mori, T ;

Watanabe, M ;

Ikeda, N ;

Nogami, Y ;

Noda, Y .

NATURE, 2005, 437 (7058) :522-524

[39] High-pressure diffraction studies on Ca2RuO4 -: art. no. 094104 [J].

Steffens, P ;

Friedt, O ;

Alireza, P ;

Marshall, WG ;

Schmidt, W ;

Nakamura, F ;

Nakatsuji, S ;

Maeno, Y ;

Lengsdorf, R ;

Abd-Elmeguid, MM ;

Braden, M .

PHYSICAL REVIEW B, 2005, 72 (09)

[40] Giant inductance in non-ohmic conductor [J].

Tanabe, Kenji ;

Taniguchi, Hiroki ;

Nakamura, Fumihiko ;

Terasaki, Ichiro .

APPLIED PHYSICS EXPRESS, 2017, 10 (08)

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