To me, the most brilliant piece of music ever composed for the violin solo is Bach's Chaconne (5th movement of Partita in D minor for solo violin (BWV 1004)), performed by many.
However to me Back (nor any of the other "virtuoso" stuff mentioned here), is not "spooky almost make you want to cry" music, whereas Arvo Part is.
The most otherworldy, trancedental "music with violin" are the slow movements of the late Beethoven string quartets:
Opus 127: String Quartet No. 12 in E flat major (1825)
Opus 130: String Quartet No. 13 in B flat major (1825)
Opus 131: String Quartet No. 14 in C sharp minor (1826)
Opus 132: String Quartet No. 15 in A minor (1825)
Opus 133: Große Fuge in B flat major for string quartet (1826), originally the finale to op. 130
Opus 135: String Quartet No. 16 in F major (1826)
However to me Back (nor any of the other "virtuoso" stuff mentioned here), is not "spooky almost make you want to cry" music, whereas Arvo Part is.
The most otherworldy, trancedental "music with violin" are the slow movements of the late Beethoven string quartets:
Opus 127: String Quartet No. 12 in E flat major (1825)
Opus 130: String Quartet No. 13 in B flat major (1825)
Opus 131: String Quartet No. 14 in C sharp minor (1826)
Opus 132: String Quartet No. 15 in A minor (1825)
Opus 133: Große Fuge in B flat major for string quartet (1826), originally the finale to op. 130
Opus 135: String Quartet No. 16 in F major (1826)