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Items: 1 to 50 of 58

1.

Rearrangement of Uncorrelated Valence Bonds Evidenced by Low-Energy Spin Excitations in YbMgGaO_{4}.

Li Y, Bachus S, Liu B, Radelytskyi I, Bertin A, Schneidewind A, Tokiwa Y, Tsirlin AA, Gegenwart P.

Phys Rev Lett. 2019 Apr 5;122(13):137201. doi: 10.1103/PhysRevLett.122.137201.

PMID:
31012603
2.

Pressure dependence of spin canting in ammonium metal formate antiferromagnets.

Collings IE, Manna RS, Tsirlin AA, Bykov M, Bykova E, Hanfland M, Gegenwart P, van Smaalen S, Dubrovinsky L, Dubrovinskaia N.

Phys Chem Chem Phys. 2018 Oct 7;20(37):24465-24476. doi: 10.1039/c8cp03761b. Epub 2018 Sep 17.

PMID:
30221645
3.

Breakdown of Magnetic Order in the Pressurized Kitaev Iridate β-Li_{2}IrO_{3}.

Majumder M, Manna RS, Simutis G, Orain JC, Dey T, Freund F, Jesche A, Khasanov R, Biswas PK, Bykova E, Dubrovinskaia N, Dubrovinsky LS, Yadav R, Hozoi L, Nishimoto S, Tsirlin AA, Gegenwart P.

Phys Rev Lett. 2018 Jun 8;120(23):237202. doi: 10.1103/PhysRevLett.120.237202.

PMID:
29932706
4.

Fully gapped d-wave superconductivity in CeCu2Si2.

Pang G, Smidman M, Zhang J, Jiao L, Weng Z, Nica EM, Chen Y, Jiang W, Zhang Y, Xie W, Jeevan HS, Lee H, Gegenwart P, Steglich F, Si Q, Yuan H.

Proc Natl Acad Sci U S A. 2018 May 22;115(21):5343-5347. doi: 10.1073/pnas.1720291115. Epub 2018 May 8.

5.

Models and materials for generalized Kitaev magnetism.

Winter SM, Tsirlin AA, Daghofer M, van den Brink J, Singh Y, Gegenwart P, Valentí R.

J Phys Condens Matter. 2017 Dec 13;29(49):493002. doi: 10.1088/1361-648X/aa8cf5.

PMID:
28914608
6.

The world's smallest capacitive dilatometer, for high-resolution thermal expansion and magnetostriction in high magnetic fields.

Küchler R, Wörl A, Gegenwart P, Berben M, Bryant B, Wiedmann S.

Rev Sci Instrum. 2017 Aug;88(8):083903. doi: 10.1063/1.4997073.

PMID:
28863703
7.

Nearest-neighbour resonating valence bonds in YbMgGaO4.

Li Y, Adroja D, Voneshen D, Bewley RI, Zhang Q, Tsirlin AA, Gegenwart P.

Nat Commun. 2017 Jun 22;8:15814. doi: 10.1038/ncomms15814.

8.

Entropy Evolution in the Magnetic Phases of Partially Frustrated CePdAl.

Lucas S, Grube K, Huang CL, Sakai A, Wunderlich S, Green EL, Wosnitza J, Fritsch V, Gegenwart P, Stockert O, V Löhneysen H.

Phys Rev Lett. 2017 Mar 10;118(10):107204. doi: 10.1103/PhysRevLett.118.107204. Epub 2017 Mar 7.

PMID:
28339268
9.

Crystalline Electric-Field Randomness in the Triangular Lattice Spin-Liquid YbMgGaO_{4}.

Li Y, Adroja D, Bewley RI, Voneshen D, Tsirlin AA, Gegenwart P, Zhang Q.

Phys Rev Lett. 2017 Mar 10;118(10):107202. doi: 10.1103/PhysRevLett.118.107202. Epub 2017 Mar 7.

PMID:
28339219
10.

Grüneisen parameter studies on heavy fermion quantum criticality.

Gegenwart P.

Rep Prog Phys. 2016 Nov;79(11):114502. Epub 2016 Oct 6.

PMID:
27710924
11.

Single crystal growth from separated educts and its application to lithium transition-metal oxides.

Freund F, Williams SC, Johnson RD, Coldea R, Gegenwart P, Jesche A.

Sci Rep. 2016 Oct 17;6:35362. doi: 10.1038/srep35362.

12.

Super-heavy electron material as metallic refrigerant for adiabatic demagnetization cooling.

Tokiwa Y, Piening B, Jeevan HS, Bud'ko SL, Canfield PC, Gegenwart P.

Sci Adv. 2016 Sep 9;2(9):e1600835. doi: 10.1126/sciadv.1600835. eCollection 2016 Sep.

13.

Muon Spin Relaxation Evidence for the U(1) Quantum Spin-Liquid Ground State in the Triangular Antiferromagnet YbMgGaO_{4}.

Li Y, Adroja D, Biswas PK, Baker PJ, Zhang Q, Liu J, Tsirlin AA, Gegenwart P, Zhang Q.

Phys Rev Lett. 2016 Aug 26;117(9):097201. doi: 10.1103/PhysRevLett.117.097201. Epub 2016 Aug 23.

PMID:
27610879
14.

A uniaxial stress capacitive dilatometer for high-resolution thermal expansion and magnetostriction under multiextreme conditions.

Küchler R, Stingl C, Gegenwart P.

Rev Sci Instrum. 2016 Jul;87(7):073903. doi: 10.1063/1.4958957.

PMID:
27475567
15.

Multiple Metamagnetic Quantum Criticality in Sr_{3}Ru_{2}O_{7}.

Tokiwa Y, Mchalwat M, Perry RS, Gegenwart P.

Phys Rev Lett. 2016 Jun 3;116(22):226402. doi: 10.1103/PhysRevLett.116.226402. Epub 2016 May 31.

PMID:
27314732
16.

Characteristic signatures of quantum criticality driven by geometrical frustration.

Tokiwa Y, Stingl C, Kim MS, Takabatake T, Gegenwart P.

Sci Adv. 2015 Apr 24;1(3):e1500001. doi: 10.1126/sciadv.1500001. eCollection 2015 Apr.

17.

Persistent Detwinning of Iron-Pnictide EuFe_{2}As_{2} Crystals by Small External Magnetic Fields.

Zapf S, Stingl C, Post KW, Maiwald J, Bach N, Pietsch I, Neubauer D, Löhle A, Clauss C, Jiang S, Jeevan HS, Basov DN, Gegenwart P, Dressel M.

Phys Rev Lett. 2014 Nov 28;113(22):227001. Epub 2014 Nov 26.

PMID:
25494081
18.

Zero-field quantum critical point in CeCoIn5.

Tokiwa Y, Bauer ED, Gegenwart P.

Phys Rev Lett. 2013 Sep 6;111(10):107003. Epub 2013 Sep 4.

PMID:
25166697
19.

Quantum criticality in a metallic spin liquid.

Tokiwa Y, Ishikawa JJ, Nakatsuji S, Gegenwart P.

Nat Mater. 2014 Apr;13(4):356-9.

PMID:
24651428
20.

Quantum bicriticality in the heavy-fermion metamagnet YbAgGe.

Tokiwa Y, Garst M, Gegenwart P, Bud'ko SL, Canfield PC.

Phys Rev Lett. 2013 Sep 13;111(11):116401. Epub 2013 Sep 9.

PMID:
24074108
21.

Interplay between Kondo suppression and Lifshitz transitions in YbRh2Si2 at high magnetic fields.

Pfau H, Daou R, Lausberg S, Naren HR, Brando M, Friedemann S, Wirth S, Westerkamp T, Stockert U, Gegenwart P, Krellner C, Geibel C, Zwicknagl G, Steglich F.

Phys Rev Lett. 2013 Jun 21;110(25):256403. Epub 2013 Jun 19.

PMID:
23829750
22.

EuFe2(As(1-x)P(x))2: reentrant spin glass and superconductivity.

Zapf S, Jeevan HS, Ivek T, Pfister F, Klingert F, Jiang S, Wu D, Gegenwart P, Kremer RK, Dressel M.

Phys Rev Lett. 2013 Jun 7;110(23):237002. Epub 2013 Jun 5.

PMID:
25167524
23.

Anomalous reduction of the Lorenz ratio at the quantum critical point in YbAgGe.

Dong JK, Tokiwa Y, Bud'ko SL, Canfield PC, Gegenwart P.

Phys Rev Lett. 2013 Apr 26;110(17):176402. Epub 2013 Apr 23.

PMID:
23679749
24.

Thermopower as a sensitive probe of electronic nematicity in iron pnictides.

Jiang S, Jeevan HS, Dong J, Gegenwart P.

Phys Rev Lett. 2013 Feb 8;110(6):067001. Epub 2013 Feb 4.

PMID:
23432292
25.

Crystal-field splitting and correlation effect on the electronic structure of A2IrO3.

Gretarsson H, Clancy JP, Liu X, Hill JP, Bozin E, Singh Y, Manni S, Gegenwart P, Kim J, Said AH, Casa D, Gog T, Upton MH, Kim HS, Yu J, Katukuri VM, Hozoi L, van den Brink J, Kim YJ.

Phys Rev Lett. 2013 Feb 15;110(7):076402. Epub 2013 Feb 13.

PMID:
25166387
26.

Coherent excitations and electron-phonon coupling in Ba/EuFe2As2 compounds investigated by femtosecond time- and angle-resolved photoemission spectroscopy.

Avigo I, Cortés R, Rettig L, Thirupathaiah S, Jeevan HS, Gegenwart P, Wolf T, Ligges M, Wolf M, Fink J, Bovensiepen U.

J Phys Condens Matter. 2013 Mar 6;25(9):094003. doi: 10.1088/0953-8984/25/9/094003. Epub 2013 Feb 12.

PMID:
23399984
27.

Na2IrO3 as a novel relativistic Mott insulator with a 340-meV gap.

Comin R, Levy G, Ludbrook B, Zhu ZH, Veenstra CN, Rosen JA, Singh Y, Gegenwart P, Stricker D, Hancock JN, van der Marel D, Elfimov IS, Damascelli A.

Phys Rev Lett. 2012 Dec 28;109(26):266406. Epub 2012 Dec 27.

PMID:
23368593
28.

Quasiparticle entropy in the high-field superconducting phase of CeCoIn(5).

Tokiwa Y, Bauer ED, Gegenwart P.

Phys Rev Lett. 2012 Sep 14;109(11):116402. Epub 2012 Sep 11.

PMID:
23005654
29.

Spin waves and revised crystal structure of honeycomb iridate Na2IrO3.

Choi SK, Coldea R, Kolmogorov AN, Lancaster T, Mazin II, Blundell SJ, Radaelli PG, Singh Y, Gegenwart P, Choi KR, Cheong SW, Baker PJ, Stock C, Taylor J.

Phys Rev Lett. 2012 Mar 23;108(12):127204. Epub 2012 Mar 20.

PMID:
22540621
30.

Relevance of the Heisenberg-Kitaev model for the honeycomb lattice iridates A2IrO3.

Singh Y, Manni S, Reuther J, Berlijn T, Thomale R, Ku W, Trebst S, Gegenwart P.

Phys Rev Lett. 2012 Mar 23;108(12):127203. Epub 2012 Mar 20.

PMID:
22540620
31.

Ultrafast momentum-dependent response of electrons in antiferromagnetic EuFe2As2 driven by optical excitation.

Rettig L, Cortés R, Thirupathaiah S, Gegenwart P, Jeevan HS, Wolf M, Fink J, Bovensiepen U.

Phys Rev Lett. 2012 Mar 2;108(9):097002. Epub 2012 Feb 27.

PMID:
22463660
32.

Magnetism and superconductivity in Eu0.2Sr0.8(Fe0.86Co0.14)2As2 probed by 75As NMR.

Sarkar R, Nath R, Khuntia P, Jeevan HS, Gegenwart P, Baenitz M.

J Phys Condens Matter. 2012 Feb 1;24(4):045702. doi: 10.1088/0953-8984/24/4/045702. Epub 2012 Jan 3.

PMID:
22214818
33.

Symmetry-breaking lattice distortion in Sr₃Ru₂O₇.

Stingl C, Perry RS, Maeno Y, Gegenwart P.

Phys Rev Lett. 2011 Jul 8;107(2):026404. Epub 2011 Jul 6.

PMID:
21797628
34.

Superconductivity versus quantum criticality: what can we learn from heavy fermions?

Steglich F, Arndt J, Friedemann S, Krellner C, Tokiwa Y, Westerkamp T, Brando M, Gegenwart P, Geibel C, Wirth S, Stockert O.

J Phys Condens Matter. 2010 Apr 28;22(16):164202. doi: 10.1088/0953-8984/22/16/164202. Epub 2010 Mar 30.

PMID:
21386408
35.

High-resolution alternating-field technique to determine the magnetocaloric effect of metals down to very low temperatures.

Tokiwa Y, Gegenwart P.

Rev Sci Instrum. 2011 Jan;82(1):013905. doi: 10.1063/1.3529433.

PMID:
21280843
36.

Evidence for a non-Fermi-liquid phase in Ge-substituted YbRh2Si2.

Custers J, Gegenwart P, Geibel C, Steglich F, Coleman P, Paschen S.

Phys Rev Lett. 2010 May 7;104(18):186402. Epub 2010 May 4.

PMID:
20482193
37.

Quantum oscillations in the anomalous phase in Sr3Ru2O7.

Mercure JF, Goh SK, O'Farrell EC, Perry RS, Sutherland ML, Rost AW, Grigera SA, Borzi RA, Gegenwart P, Mackenzie AP.

Phys Rev Lett. 2009 Oct 23;103(17):176401. Epub 2009 Oct 22.

PMID:
19905773
38.

Kondo-cluster-glass state near a ferromagnetic quantum phase transition.

Westerkamp T, Deppe M, Küchler R, Brando M, Geibel C, Gegenwart P, Pikul AP, Steglich F.

Phys Rev Lett. 2009 May 22;102(20):206404. Epub 2009 May 20.

PMID:
19519047
39.

Evolution of quantum criticality in CeNi(9-x)Cu(x)Ge(4).

Peyker L, Gold C, Scheidt EW, Scherer W, Donath JG, Gegenwart P, Mayr F, Unruh T, Eyert V, Bauer E, Michor H.

J Phys Condens Matter. 2009 Jun 10;21(23):235604. doi: 10.1088/0953-8984/21/23/235604. Epub 2009 May 15.

PMID:
21825591
40.

Divergence of the magnetic Grüneisen ratio at the field-induced quantum critical point in YbRh2Si2.

Tokiwa Y, Radu T, Geibel C, Steglich F, Gegenwart P.

Phys Rev Lett. 2009 Feb 13;102(6):066401. Epub 2009 Feb 10.

PMID:
19257612
41.

Dimensional crossover of quantum critical behavior in CeCoIn5.

Donath JG, Steglich F, Bauer ED, Sarrao JL, Gegenwart P.

Phys Rev Lett. 2008 Apr 4;100(13):136401. Epub 2008 Mar 31.

PMID:
18517974
42.

Multiple energy scales at a quantum critical point.

Gegenwart P, Westerkamp T, Krellner C, Tokiwa Y, Paschen S, Geibel C, Steglich F, Abrahams E, Si Q.

Science. 2007 Feb 16;315(5814):969-71.

43.

Quantum criticality in the cubic heavy-fermion system CeIn3-xSnx.

Küchler R, Gegenwart P, Custers J, Stockert O, Caroca-Canales N, Geibel C, Sereni JG, Steglich F.

Phys Rev Lett. 2006 Jun 30;96(25):256403. Epub 2006 Jun 30.

PMID:
16907329
44.

Metamagnetic quantum criticality in Sr3Ru2O7 studied by thermal expansion.

Gegenwart P, Weickert F, Garst M, Perry RS, Maeno Y.

Phys Rev Lett. 2006 Apr 7;96(13):136402. Epub 2006 Apr 5.

PMID:
16712009
45.

Two-channel Kondo effect in glasslike ThAsSe.

Cichorek T, Sanchez A, Gegenwart P, Weickert F, Wojakowski A, Henkie Z, Auffermann G, Paschen S, Kniep R, Steglich F.

Phys Rev Lett. 2005 Jun 17;94(23):236603. Epub 2005 Jun 16.

PMID:
16090491
46.

Field-induced suppression of the heavy-fermion state in YbRh2Si2.

Tokiwa Y, Gegenwart P, Radu T, Ferstl J, Sparn G, Geibel C, Steglich F.

Phys Rev Lett. 2005 Jun 10;94(22):226402. Epub 2005 Jun 6.

PMID:
16090416
47.

Ferromagnetic quantum critical fluctuations in YbRh2(Si0.95Ge0.05)2.

Gegenwart P, Custers J, Tokiwa Y, Geibel C, Steglich F.

Phys Rev Lett. 2005 Feb 25;94(7):076402. Epub 2005 Feb 23.

PMID:
15783833
48.

Hall-effect evolution across a heavy-fermion quantum critical point.

Paschen S, Lühmann T, Wirth S, Gegenwart P, Trovarelli O, Geibel C, Steglich F, Coleman P, Si Q.

Nature. 2004 Dec 16;432(7019):881-5.

PMID:
15602556
49.

Disorder-sensitive phase formation linked to metamagnetic quantum criticality.

Grigera SA, Gegenwart P, Borzi RA, Weickert F, Schofield AJ, Perry RS, Tayama T, Sakakibara T, Maeno Y, Green AG, Mackenzie AP.

Science. 2004 Nov 12;306(5699):1154-7.

50.

Grüneisen ratio divergence at the quantum critical point in CeCu(6-x)Agx.

Küchler R, Gegenwart P, Heuser K, Scheidt EW, Stewart GR, Steglich F.

Phys Rev Lett. 2004 Aug 27;93(9):096402. Epub 2004 Aug 25.

PMID:
15447119

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