TY - JOUR
T1 - Characteristic Fermi surfaces and charge density wave in SrAl4 and related compounds with the BaAl4-type tetragonal structure
AU - Nakamura, Ai
AU - Uejo, Taro
AU - Harima, Hisatomo
AU - Araki, Shingo
AU - Kobayashi, Tatsuo C.
AU - Nakashima, Miho
AU - Amako, Yasushi
AU - Hedo, Masato
AU - Nakama, Takao
AU - Onuki, Yoshichika
N1 - Funding Information:
We are very grateful to S. Shimomura, S. Tsutsui, K. Kaneko, T. Kawasaki, S. Kayama, T. Kagayama, and K. Shimizu for helpful discussions. This work was supported by Grant-in-Aid for Scientific Research on Challenging Exploratory Research (No. 25610097 ) and (C) (No. 25400342 ) from the Ministry of Education, Culture, Sports, Science and Technology , Japan.
Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.
PY - 2016/1/5
Y1 - 2016/1/5
N2 - We succeeded in growing single crystals of SrAl4 and related compounds with the BaAl4-type tetragonal structure by the self-flux method, and measured the electrical resistivity, magnetic susceptibility, Hall coefficient, thermoelectric power, and de Haas-van Alphen (dHvA) effect. A plausible characteristic feature of the charge density wave (CDW) was observed below TCDW = 243 K in SrAl4. We also studied an effect of pressure on the electronic state in SrAl4 by measuring the electrical resistivity and thermoelectric power. TCDW is found to decrease with increasing pressure, with a rate of dTCDW/dP = -12.5 K/GPa. To clarify the Fermi surface nesting, we studied the Fermi surface in SrAl4, which is found to be different from the Fermi surfaces of the similar compounds SrGa4, BaGa4, and BaAl4 without CDW. The Fermi surfaces in these compounds were determined from the dHvA experiments, together with the energy band calculations.
AB - We succeeded in growing single crystals of SrAl4 and related compounds with the BaAl4-type tetragonal structure by the self-flux method, and measured the electrical resistivity, magnetic susceptibility, Hall coefficient, thermoelectric power, and de Haas-van Alphen (dHvA) effect. A plausible characteristic feature of the charge density wave (CDW) was observed below TCDW = 243 K in SrAl4. We also studied an effect of pressure on the electronic state in SrAl4 by measuring the electrical resistivity and thermoelectric power. TCDW is found to decrease with increasing pressure, with a rate of dTCDW/dP = -12.5 K/GPa. To clarify the Fermi surface nesting, we studied the Fermi surface in SrAl4, which is found to be different from the Fermi surfaces of the similar compounds SrGa4, BaGa4, and BaAl4 without CDW. The Fermi surfaces in these compounds were determined from the dHvA experiments, together with the energy band calculations.
KW - Alkaline-earth metal compounds
KW - Charge density wave (CDW)
KW - Crystal growth
KW - de Haas-van Alphen effect
KW - Electrical resistivity
KW - Fermi surfaces
UR - http://www.scopus.com/inward/record.url?scp=84942354171&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84942354171&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2015.08.193
DO - 10.1016/j.jallcom.2015.08.193
M3 - Article
AN - SCOPUS:84942354171
SN - 0925-8388
VL - 654
SP - 290
EP - 299
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
ER -